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crop-chem-docs/corpus/epa_ppls/241-337.md
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# PROWL 3.3 EC HERBICIDE
- EPA Reg No: **241-337**
- Registrant: BASF AGRICULTURAL SOLUTIONS US LLC
- Signal word: Caution
- Active ingredients: Pendimethalin (37.4%)
- Label accepted: 2025-03-25
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000241-00337-20250325.pdf
---
March 25, 2025
Christa Ellers-Kirk
Federal Registration Manager
BASF Corporation
26 Davis Drive
Research Triangle Park, NC 27709-3528
Subject: Label Amendment - Registration Review Mitigation for Pendimethalin
Product Name: Prowl 3.3 EC Herbicide
EPA Registration Number: 241-337
Application Date: December 15, 2021
Decision Number: 580756
Case Number: 482928
Dear Christa Ellers-Kirk:
The Agency, in accordance with the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA),
as amended, has completed reviewing all the information submitted with your application to
support the Registration Review of the above referenced product in connection with the
Pendimethalin Interim Decision, and has concluded that your submission is acceptable. The
label referred to above, submitted in connection with registration under FIFRA, as amended, is
acceptable.
Should you wish to add/retain a reference to the companys website on your label, then please
be aware that the website becomes labeling under the Federal Insecticide, Fungicide, and
Rodenticide Act and is subject to review by the Agency. If the website is false or misleading, the
product would be misbranded and unlawful to sell or distribute under FIFRA section 12(a)(1)(E).
40 CFR 156.10(a)(5) list examples of statements EPA may consider false or misleading. In
addition, regardless of whether a website is referenced on your products label, claims made on
the website may not substantially differ from those claims approved through the registration
process. Therefore, should the Agency find or if it is brought to our attention that a website
contains false or misleading statements or claims substantially differing from the EPA approved
registration, the website will be referred to the EPAs Office of Enforcement and Compliance
Assurance.
Page 2 of 2
EPA Reg. No. 241-337
Decision No. 580756
A stamped copy of your labeling is enclosed for your records. This labeling supersedes
all previously accepted labeling and must be used at your next label printing. You must
submit one copy of the final printed labeling before you release the product for
shipment with the new labeling. In accordance with 40 CFR 152.130(c), you may
distribute or sell this product under the previously approved labeling for 12 months
from the date of this letter. After 12 months, you may only distribute or sell this
product if it bears this new revised labeling or subsequently approved labeling. “To
distribute or sell” is defined under FIFRA section 2(gg) and its implementing regulation
at 40 CFR 152.3.
If you have any questions about this letter, please contact Caleb Carr by phone at (202) 566-
0636, or via email at carr.caleb@epa.gov.
Sincerely,
Linda Arrington, Branch Chief
Risk Management and Implementation Branch 4
Pesticide Re-Evaluation Division
Office of Pesticide Programs
ENCLOSURE: Stamped label
Pendimethalin Group 3 Herbicide
FOR USE IN SELECTED CROPS
Active Ingredient*:
pendimethalin: N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine ........ 37.4%
Other Ingredients:............................................... 62.6%
Total: ......................................................... 100.0%
(1 gallon contains 3.3 pounds of pendimethalin)
* Contains aromatic naphtha.
EPA Reg. No. 241-337 EPA Est. No.
KEEP OUT OF REACH OF CHILDREN
CAUTION/PRECAUCION
Si usted no entiende la etiqueta, busque a alguien para que se la explique a usted en
detalle. (If you do not understand the label, find someone to explain it to you in detail.)
See inside for complete First Aid, Precautionary Statements, Directions For Use,
Conditions of Sale and Warranty, and state-specific crop and/or use site restrictions.
In case of an emergency endangering life or property involving this product,
call day or night 1-800-832-HELP (4357).
Net Contents:
BASF Corporation
26 Davis Drive, Research Triangle Park, NC 27709
Mar 25, 2025
241-337
2
Precautionary Statements
Hazards to Humans and Domestic Animals
CAUTION. Causes moderate eye irritation. Harmful if
swallowed or absorbed through the skin. Avoid contact
with skin, eyes or clothing.
Personal Protective Equipment (PPE)
Applicators and other handlers must wear:
• Long-sleeved shirt and long pants
• Chemical-resistant gloves made of barrier laminate,
butyl rubber ≥ 14 mils, nitrile rubber ≥ 14 mils, or viton
≥ 14 mils
• Shoes plus socks
Follow manufacturers instructions for cleaning/maintaining
PPE. If no such instructions for washables exists, use
detergent and hot water. Keep and wash PPE separately
from other laundry. Discard clothing and other absorbent
materials that have been drenched or heavily contaminat-
ed with this products concentrate. DO NOT reuse them.
Engineering Controls:
When handlers use closed systems, enclosed cabs, or air-
craft in a manner that meets the requirements listed in the
Worker Protection Standard (WPS) for agricultural pesti-
cides [(40 CFR 170.240)(d)(4-6)], the handler PPE
requirements may be reduced or modified as specified in
the WPS.
USER SAFETY RECOMMENDATIONS
Users should:
• Wash hands before eating, drinking, chewing gum,
using tobacco, or using the toilet.
• Remove clothing immediately if pesticide gets inside.
Wash thoroughly and put on clean clothing.
• Remove PPE immediately after handling this product.
Wash the outside of gloves before removing. As soon as
possible, wash thoroughly and change into clean clothing.
Environmental Hazards
This product is toxic to fish. DO NOT apply directly to
water, or to areas where surface water is present, or to
intertidal areas below the mean high water mark. Drift and
runoff from treated areas may be hazardous to aquatic
organisms in adjacent aquatic sites. DO NOT contaminate
water when disposing of equipment washwaters or rinsate.
Nontarget Organism Advisory
This product is toxic to plants and may adversely impact
the forage and habitat of nontarget organisms, including
pollinators, in areas adjacent to the treated site. Protect the
forage and habitat of nontarget organisms by following
label directions intended to minimize spray drift.
Endangered Species Protection
It is a Federal offense to use any pesticide in a manner that
results in an unauthorized "take" (e.g., kill or otherwise
harm) of an endangered species, and certain threatened
species, under the Endangered Species Act section 9.
FIRST AID
If swallowed
• Call a poison control center or doctor immediately for treatment advice.
• DO NOT give any liquid to person.
• DO NOT induce vomiting unless told to do so by a poison control center or doctor.
• DO NOT give anything by mouth to an unconscious person.
If in eyes
• Hold eyes open and rinse slowly and gently with water for 15 to 20 minutes.
• Remove contact lenses, if present, after first 5 minutes; then continue rinsing eyes.
• Call a poison control center or doctor for treatment advice.
If on skin
• Take off contaminated clothing.
• Rinse skin immediately with plenty of water for 15 to 20 minutes.
• Call a poison control center or doctor for treatment advice.
NOTE TO PHYSICIAN
Because of increased risk of chemical pneumonia or pulmonary edema caused by aspiration of the hydrocarbon sol-
vent, vomiting should be induced only under professional supervision.
HOT LINE NUMBER
Have the product container or label with you when calling a poison control center or doctor or going for treatment.
You may also contact BASF Corporation for emergency medical treatment information: 1-800-832-HELP (4357).
Prowl® 3.3 EC herbicide
FOR USE IN ALFALFA (FORAGE, HAY OR SEED PRODUCTION), BEARING CITRUS FRUIT TREES, BEARING
NUT TREES, BEARING POME FRUIT TREES, BEARING STONE FRUIT TREES, CARROTS, CORN (FIELD,
POP, SEED, SWEET), COTTON, EDIBLE BEANS, FORAGE LEGUMES, FRUITING VEGETABLES (PEPPER,
TOMATO), GARLIC, GRAIN SORGHUM, LEEK, LENTILS AND PEAS, MINT, NONBEARING FRUIT TREE AND
NUT TREE CROPS, NONBEARING VINEYARDS, ONIONS AND SHALLOTS (DRY BULB, GREEN), PEANUTS,
POTATOES, RICE, SOYBEANS, STRAWBERRY, SUGARCANE, SUNFLOWERS, TOBACCO, AND WHEAT.
3
When using this product, you must follow the measures
contained in the Endangered Species Protection Bulletin
for the area in which you are applying the product. You
must obtain a Bulletin no earlier than six months before
using this product. To obtain Bulletins, consult
http://www.epa.gov/espp/, call 1-844-447-3813, or email
ESPP@epa.gov. You must use the Bulletin valid for the
month in which you will apply the product.
If endangered plant species occur in proximity to the appli-
cation site, the following mitigation measures are required:
• If applied by ground, leave an untreated buffer zone of
200 ft. The product must be applied using a low boom
(20 inches above the ground) and medium or coarser
droplet size (ASAE S572).
• If applied by air, leave an untreated buffer zone of 170 ft.
Must use straight-stream nozzles (D-6 or larger); wind
can be no more than 8 mph; and release height must be
10 ft or less.
Directions For Use
It is a violation of federal law to use this product in a man-
ner inconsistent with its labeling. This label must be in the
possession of the user at the time of pesticide application.
Observe all cautions and limitations in this label and the
labels of products used in combination with
Prowl
® 3.3 EC herbicide. The use of Prowl 3.3 EC not
consistent with this label can result in injury to crops, ani-
mals, or persons. Keep containers closed to avoid spills
and contamination.
DO NOT apply this product in a way that will contact
workers or other persons, either directly or through drift.
Only protected handlers may be in the area during applica-
tion. For any requirements specific to your state or tribe,
consult the agency responsible for pesticide protection.
DO NOT enter or allow other people (or pets) to enter the
treated area until sprays have dried.
BASF intends that this product may not be used for manu-
facturing products for application to turf and ornamentals.
BASF does not recommend or authorize the use of this
product in manufacturing, processing or preparing custom
blends with other products for application to field and row
crops or to orchard, grove, and vineyard crops.
AGRICULTURAL USE REQUIREMENTS
Use this product only in accordance with its labeling and
with the Worker Protection Standard, 40 CFR Part 170.
This standard contains requirements for the protection
of agricultural workers on farms, forests, nurseries, and
greenhouses, and handlers of agricultural pesticides. It
contains requirements for training, decontamination,
notification, and emergency assistance. It also contains
specific instructions and exceptions pertaining to the
statements on this label about personal protective
equipment (PPE) and restricted-entry interval. The
requirements in this box only apply to uses of this prod-
uct that are covered by the Worker Protection Standard.
DO NOT enter or allow worker entry into treated areas
during the restricted-entry interval (REI) of 24 hours.
Exception: if the product is soil injected or soil incorpo-
rated, the Worker Protection Standard, under certain
circumstances, allows workers to enter the treated area
if there will be no contact with anything that has been
treated.
PPE required for early entry to treated areas that is per-
mitted under the Worker Protection Standard and that
involves contact with anything that has been treated,
such as plants, soil, or water, is:
• Coveralls
• Chemical-resistant gloves made of barrier laminate,
butyl rubber ≥ 14 mils, nitrile rubber ≥ 14 mils, or viton
≥ 14 mils
• Shoes plus socks
STORAGE AND DISPOSAL
DO NOT contaminate water, food, or feed by storage or
disposal.
Pesticide Storage
DO NOT STORE BELOW 40° F. Extended storage at
temperatures below 40° F can result in the formation of
crystals on the bottom of the container. If crystallization
does occur, store the container on its side at room tem-
perature (70° F) and rock occasionally until crystals
redissolve.
Pesticide Disposal
Pesticide wastes are toxic. Improper disposal of excess
pesticide, spray mixture, or rinsate is a violation of feder-
al law.
If these wastes cannot be disposed of by use according
to label directions, contact your State Pesticide or
Environmental Control Agency, or the Hazardous Waste
representative at the nearest EPA Regional Office for
guidance.
(continued)
4
STORAGE AND DISPOSAL (continued)
Container Disposal
Nonrefillable Container. DO NOT reuse or refill this
container. Triple rinse or pressure rinse container (or
equivalent) promptly after emptying; then offer for recy-
cling, if available, or reconditioning, if appropriate, or
puncture and dispose of in a sanitary landfill, or by incin-
eration, or by other procedures approved by state and
local authorities.
Triple rinse containers small enough to shake
(capacity ≤ 5 gallons) as follows: Empty the remain-
ing contents into application equipment or a mix tank
and drain for 10 seconds after the flow begins to drip. Fill
the container 1/4 full with water and recap. Shake for
10 seconds. Pour rinsate into application equipment or a
mix tank, or store rinsate for later use or disposal. Drain
for 10 seconds after the flow begins to drip. Repeat this
procedure two more times.
Triple rinse containers too large to shake
(capacity > 5 gallons) as follows: Empty the remain-
ing contents into application equipment or a mix tank.
Fill the container 1/4 full with water. Replace and tighten
closures. Tip container on its side and roll it back and
forth, ensuring at least one complete revolution, for
30 seconds. Stand the container on its end and tip it
back and forth several times. Turn the container over
onto its other end and tip it back and forth several times.
Empty the rinsate into application equipment or a mix
tank, or store rinsate for later use or disposal. Repeat
this procedure two more times.
Pressure rinse as follows: Empty the remaining con-
tents into application equipment or mix tank and
continue to drain for 10 seconds after the flow begins to
drip. Hold container upside down over application
equipment or mix tank, or collect rinsate for later use or
disposal. Insert pressure rinsing nozzle in the side of the
container and rinse at about 40 PSI for at least 30 sec-
onds. Drain for 10 seconds after the flow begins to drip.
Refillable Container. Refill this container with pesticide
only. DO NOT reuse this container for any other pur-
pose. Triple rinsing the container before final disposal is
the responsibility of the person disposing of the contain-
er. Cleaning before refilling is the responsibility of the
refiller.
Triple rinse as follows: To clean the container before
final disposal, empty the remaining contents from this
container into application equipment or mix tank. Fill the
container about 10% full with water. Agitate vigorously or
recirculate water with the pump for 2 minutes. Pour or
pump rinsate into application equipment or rinsate col-
lection system. Repeat this rinsing procedure two more
times.
(continued)
STORAGE AND DISPOSAL (continued)
Container Disposal (continued)
When this container is empty, replace the cap and seal
all openings that have been opened during use; return
the container to the point of purchase or to a designated
location. This container must only be refilled with a pesti-
cide product. DO NOT reuse the container for any other
purpose. Prior to refilling, inspect carefully for damage
such as cracks, punctures, abrasions, worn-out threads
and closure devices. Check for leaks after refilling and
before transport. DO NOT transport if this container is
damaged or leaking. If the container is damaged, or
leaking, or obsolete and not returned to the point of pur-
chase or to a designated location, triple rinse emptied
container and offer for recycling, if available, or dispose
of container in compliance with state and local
regulations.
In Case of Emergency
In case of large-scale spill of this product, call:
• CHEMTREC 1-800-424-9300
• BASF Corporation 1-800-832-HELP (4357)
In case of medical emergency regarding this product, call:
• Your local doctor for immediate treatment
• Your local poison control center (hospital)
• BASF Corporation 1-800-832-HELP (4357)
Steps to take if material is released or spilled:
• Dike and contain the spill with inert material (sand, earth,
etc.) and transfer liquid and solid diking material to sepa-
rate containers for disposal.
• Remove contaminated clothing and wash affected skin
areas with soap and water.
• Wash clothing before reuse.
• Keep the spill out of all sewers and open bodies of water.
General Information
Prowl® 3.3 EC herbicide is a selective herbicide for con-
trolling most annual grasses and certain broadleaf weeds
as they germinate. Refer to Table 1 for a complete list of
controlled weeds. Prowl 3.3 EC will not control estab-
lished weeds.
Unusually cold, excessively wet, or hot and dry conditions
that delay germination or extend germination over a long
period of time can reduce weed control.
Overapplication can result in crop-stand loss, crop injury,
or soil residues.
Uneven application or improper soil incorporation can
decrease weed control or cause crop injury. Soil incorpo-
ration deeper than recommended can reduce weed
control.
Seedling diseases, cold weather, excessive moisture, shal-
low or deep planting, low or high soil pH, high soil salt
concentration, or drought can weaken seedlings and
5
plants and increase the possibility of crop damage from
Prowl® 3.3 EC herbicide. Under these conditions, crop
yields can be reduced.
Table 1. Weeds Controlled
(see crop sections for additional weeds controlled)
Weeds controlled with Prowl 3.3 EC
applied up to 4.8 pts/A
Grasses
Annual ryegrass Italian ryegrass*
Barnyardgrass Japanese brome*
, a
Canarygrass*, b Johnsongrass (seedling)
Cheat*, b Jointed goatgrass*, a
Crabgrass Oat, wild*
Crowfootgrass Panicum, fall
Downy brome* (Cheatgrass) Panicum, Texas
Foxtail, giant Sandbur, field
Foxtail, green Shattercane*
Foxtail, yellow Signalgrass*
Goosegrass Wild proso millet*
Hairy chess*
, a Witchgrass
Itchgrass* Woolly cupgrass*
Broadleaves
Amaranth, Palmer Mustard, black b
Bugloss, smalla Pigweed species
Carpetweed Purslane
Chickweed, common* Pusley, Florida
Henbit Shepherdspurse*
Kochia Smartweed, Pennsylvania*
Ladys thumb Spurge, annual
Lambsquarters, common Velvetleaf*
Lambsquarters, slimleaf Waterhemp species
London rocket*
* Suppression, but controlled when Prowl 3.3 EC use rate exceeds
4.8 pts/A.
a Neither suppressed nor controlled in California.
b Not controlled in California.
(continued)
Table 1. Weeds Controlled (continued)
(see crop sections for additional weeds controlled)
Weeds controlled with Prowl 3.3 EC applied
at 4.8 pts/A or greater
Grasses
Annual bluegrass Lovegrass
Browntop panicum Sprangletop, Mexican
Grass, Guinea
b Sprangletop, red
Junglerice Swollen fingergrass
Broadleaves
Dodder† Prostrate, knotweed
Fiddleneck Puncturevine
Morningglory**
† For optimum dodder control, use the highest labeled rate of
Prowl 3.3 EC specified in the specific crop.
** Suppression
b Not controlled in California.
Mode of Action
Pendimethalin, the active ingredient in Prowl 3.3 EC, is a
Group 3 (WSSA)/Group K1 (HRAC) herbicide belonging
to the dinitroaniline chemistry class. Prowl 3.3 EC is a
meristematic inhibitor that interferes with meristematic
plant cell division or mitosis inhibiting germinating seedling
growth.
Herbicide Resistance Management
Prowl 3.3 EC is a Group 3 herbicide. Any weed popula-
tion may contain or develop plants naturally resistant to
Prowl 3.3 EC and other Group 3 herbicides. Weed spe-
cies with resistance to Group 3 may eventually dominate
the weed population if Group 3 herbicides are used
repeatedly in the same field or in successive years as the
primary method of control for targeted species. This may
result in partial or total loss of control of those species by
Prowl 3.3 EC or other Group 3 herbicides.
To delay herbicide resistance consider:
• Avoiding the consecutive use of Prowl 3.3 EC or other
target site-of-action Group 3 herbicides that have a sim-
ilar target site of action on the same weed species.
• Using tank mixes or premixes with herbicides from differ-
ent target-site-of-action groups as long as the involved
products are all registered for the same use, have differ-
ent sites of action, and are both effective at the tank mix
or prepack rate on the weed(s) of concern.
- Basing herbicide use on a comprehensive IPM
(Integrated Pest Management) program including cul-
tural and mechanical methods.
- Monitoring treated weed populations for loss of field
efficacy, and control of escapes with effective alterna-
tive herbicides or mechanical methods.
- Identify weeds present in the field through scouting and
field history and understand their biology.
6
The weed-control program needs to consider all of the
weeds present.
- Scout fields prior to application to identify the weed
species present and their growth stage to determine if
the intended application will be effective.
- Scout fields after application to verify the treatment was
effective.
- Suspected herbicide-resistance weeds may be identi-
fied by these indicators:
1. Failure to control a weed species normally controlled
by the herbicide at the dose applied, especially if
control is achieved on adjacent weeds;
2. A spreading patch of non-controlled plants of a par-
ticular weed species; and
3. Surviving plants mixed with controlled individuals of
the same species.
• If resistance is suspected, treat weed escapes with an
herbicide with a different MOA and/or use nonchemical
methods to remove escapes, as practical, with the goal
of preventing further seed production.
• Report any incidence of non-performance of this product
against a particular weed species to your local BASF
representative.
• Contacting your local extension specialist, certified crop
advisors, and/or manufacturer for herbicide resistance
management and/or integrated weed management
directions for specific crops and resistant weed biotypes.
Application Rate
Use rates for Prowl® 3.3 EC herbicide when used alone,
in tank mix, or sequential applications are given in
Crop-specific Information . Use rates of this product
vary by soil texture and organic matter. See Table 2 for
soil texture groupings used in this label.
Table 2. Soil Texture Groups
COARSE MEDIUM FINE
sands
loamy sands
sandy loams
sandy clay loams*
sandy clays
loams
silt loams
silts
silty clay loams*
silty clays
clay loams
clays
* Sometimes considered transitional soils and may be classified as
either medium- or fine-textured soils.
Peat and Muck soils: Prowl 3.3 EC may be used on
peat and muck soils, but weed control may be inconsis-
tent and/or reduced. Use maximum labeled use rate
allowed in the specific crop.
Application Timings
Prowl 3.3 EC will provide most effective weed control
when applied by ground or aerial equipment and subse-
quently incorporated into soil within 7 days after
application by rainfall, sprinkler irrigation, or mechanical
tillage prior to weed seedling emergence from soil.
Prowl 3.3 EC can also be applied through chemigation,
including flooded basin irrigation systems. Prowl 3.3 EC is
recommended for preplant surface, preplant incorporated,
surface incorporated, preemergence, early postemer-
gence, postemergence incorporated (CULTI-SPRAY) or
layby treatment. See Crop-specific Information for spe-
cific application directions by crop.
Preplant Surface Applications. For use in minimum till-
age or no-tillage production systems, apply Prowl 3.3 EC
alone or in tank mixes up to 45 days before planting. When
making early preplant surface applications (15 to 45 days
prior to planting), Prowl 3.3 EC should be tank mixed or
followed by a postemergence herbicide application. Rain-
fall or sprinkler irrigation within 7 days after application is
required to move this product into the upper soil surface
where weed seeds germinate.
Preplant Incorporated Applications. Apply
Prowl 3.3 EC and incorporate into the upper (1 inch to
2 inches) soil surface up to 60 days before planting. Use
an implement capable of giving uniform incorporation;
two-pass incorporation usually results in a more consistent
result.
Surface Incorporated Applications. Uniformly apply
Prowl 3.3 EC as broadcast or banded treatment to soil
surface underneath established trees and/or in ground
areas between trees rows. Within 7 days after application,
incorporate into upper (1 inch to 2 inches) soil surface
using either rainfall, sprinkler irrigation, or shallow mechani-
cal incorporation using an implement capable of giving
uniform incorporation; two-pass mechanical incorporation
usually results in a more consistent result.
Preemergence Surface Applications. Broadcast treat-
ment uniformly to the soil surface at planting and up to
2 days after planting. Rainfall, sprinkler irrigation, or shal-
low mechanical incorporation within 7 days after
application is required to move this product into the upper
soil surface where weed seeds germinate. If adequate
rainfall or irrigation does not occur and weed seedling
emergence begins, a shallow cultivation or rotary hoeing
will improve performance.
Early Postemergence Applications. Prowl 3.3 EC
must be applied prior to weed seedling emergence or in a
tank mix with products that control the emerged weeds.
Refer to Crop-specific Information for specific poste-
mergence application recommendations by crop.
Postemergence Incorporated Applications (CULTI-
SPRAY). Prior to application, crop must be cultivated in
such a manner as to throw at least one inch of soil over the
base of the crop plants. This will prevent direct contact of
Prowl 3.3 EC and the zone of brace root formation.
Prowl 3.3 EC must be applied broadcast with a ground
sprayer when crop is at least 4 inches tall up to layby. Use
drop nozzles if crop foliage will prevent uniform coverage
of the soil surface within the rows. Thoroughly and uni-
formly incorporate Prowl 3.3 EC treatments into the soil
with:
(1) a sweep-type or rolling cultivator set to provide thor-
ough incorporation in the top 1 inch of soil, or
(2) adequate overhead irrigation water or rainfall. See
Crop-specific Information (Corn and Grain
7
Sorghum) for more details on (CULTI-SPRAY)
application.
Layby Application. Apply Prowl® 3.3 EC herbicide
directly to the soil between rows as a directed spray fol-
lowing the last normal cultivation (layby). See
Crop-specific Information for more details on layby
application.
Split Applications. Prowl 3.3 EC may be applied pre-
plant incorporated up to 60 days prior to planting and
followed by a preemergence application at planting or up
to 2 days after planting. The total amount of Prowl 3.3 EC
applied per acre per season cannot exceed the highest
labeled rate for any given soil type. See Crop-specific
Information for more details on split applications.
Fall Applications. Prowl 3.3 EC may be used in fall
application programs in certain crops. See Crop-specific
Information for details on fall application timing.
Application Instructions
Prowl 3.3 EC may be applied using either water or spray-
able fluid fertilizer (such as straight 32-0-0 or 28-0-0) as
the spray carrier. Additionally, Prowl 3.3 EC may be
impregnated on dry bulk fertilizer. Sprayable fluid fertilizer
as a carrier is NOT recommended for use after crop emer-
gence unless the typical fertilizer burn symptoms on the
crop are acceptable.
Spray Mix Compatibility Test
If liquid fertilizer/herbicide(s) mixture separates in the spray
tank, clogged equipment and uneven application can
result. Always predetermine the compatibility of
Prowl 3.3 EC alone or with other herbicides based on the
following compatibility “jar test”:
1. Add 1 pint of fertilizer to a quart jar.
2. Add 1 to 4 teaspoon(s) of the Dry Flowable (DF), Wetta-
ble Powder (WP), Aqueous Solution (AS), Flowable (F) or
Liquid (L) formulation (depending on mixing ratio
required) to the liquid fertilizer. The number of teaspoons
of the formulation to add can be determined by the fol-
lowing formula:
lbs or pts of product/acre x1 1 . 4=
number of
teaspoons of
herbicide to add to
1 pint of fertilizer
gallons of fertilizer/acre
3. Close the jar and agitate until the herbicide(s) are evenly
dispersed in the liquid fertilizer. If the materials DO NOT
disperse well, it may be necessary to slurry the chemi-
cals in water before adding to the fertilizer.
4. After dispersing the materials, add appropriate number
of teaspoons of Prowl 3.3 EC to the jar and shake well.
Add water soluble concentrate herbicides to the mixture
last and agitate. Let the mixture stand for 30 minutes
and then observe the results. Look for signs of separa-
tion: an oily layer or globules, sludge, flakes or other
precipitates.
5. Evaluate compatibility.
(a) If the herbicide(s) and liquid fertilizer mixture does not
separate, use this mixture in your spray tank.
(b) If the mixture separates but mixes readily with shak-
ing, the mixture can be used provided that good
agitation is maintained in the spray tank.
(c) If separation of the mixture occurs and agitation does
not correct this problem, a compatibility agent is
needed.
6. If the need for a compatibility agent is demonstrated, the
following procedure is recommended: Using a clean
quart jar, repeat step 1 above and add 1/2 teaspoon of
the compatibility agent to the liquid fertilizer. Mix well
and repeat steps 2, 3 and 4. If separation or precipita-
tion occurs with the compatibility agent, DO NOT use
Prowl 3.3 EC with that specific liquid fertilizer.
Aerial Applications
Uniformly apply in 5 or more gallons of water per acre.
Ground Applications (Broadcast)
Uniformly apply with properly calibrated ground equipment
in 10 or more gallons of water per acre or 20 or more gal-
lons of liquid fertilizer per acre. Keep the bypass line on or
near the bottom of the tank to minimize foaming. Nozzle
and in-line screens must be no finer than 50 mesh.
Ground Applications (Band)
Uniformly apply the broadcast equivalent rate and volume
per acre. To determine these:
Band Width in Inches x Broadcast Rate
per Acre = Band Rate
per AcreRow Width in Inches
Band Width in Inches x Broadcast
Volume per Acre =
Band
Volume
per AcreRow Width in Inches
Ground Applications (Dry Bulk Fertilizer)
Apply Prowl 3.3 EC/dry bulk fertilizer mixtures only with
ground equipment. DO NOT impregnate Prowl 3.3 EC
onto coated ammonium nitrate or limestone because these
materials will not absorb the herbicide. Dry fertilizer blends
containing mixtures of ammonium nitrate or limestone may
be impregnated with Prowl 3.3 EC. A minimum of
200 pounds of impregnated dry bulk fertilizer, excluding
the weight of ammonium nitrate or limestone, must be
applied per acre.
Calculate the amount of Prowl 3.3 EC to be impregnated
on a ton of dry bulk fertilizer based on the rate of fertilizer
to be applied per acre:
2000 x
Pints of
Prowl 3.3 EC
(Recommended
Rate per Acre)
=
Pints of
Prowl 3.3 EC
per Ton of
Fertilizer
Pounds of Dry
Fertilizer per Acre
To impregnate Prowl 3.3 EC on bulk fertilizer, use a
closed rotary-drum mixer or other commonly used dry
bulk fertilizer blender equipped with suitable spray equip-
ment. Spray nozzles must be placed to provide uniform
coverage of Prowl 3.3 EC onto the fertilizer during mixing.
Apply the Prowl 3.3 EC/dry bulk fertilizer mixture with an
accurately calibrated dry fertilizer spreader. The
Prowl 3.3 EC/dry bulk fertilizer mixture must be spread
uniformly on the soil surface.
8
Chemigation Applications via Sprinkler Irrigation
Systems
Prowl
® 3.3 EC herbicide may be applied as a chemiga-
tion treatment through sprinkler irrigation systems. Refer to
Crop-specific Information sections for individual crops.
DO NOT apply Prowl 3.3 EC via chemigation to crops
unless specified in Crop-specific Information section.
Apply this product ONLY through a sprinkler irrigation sys-
tem of the following type: center pivot, lateral move, end
tow, side (wheel) roll, traveler, big gun, solid set, or hand
move.
DO NOT apply this product through any other type
of sprinkler irrigation system.
Uniform distribution of Prowl 3.3 EC-treated irrigation
water is the sole responsibility of the applicator and is
required to avoid crop injury, lack of herbicide effective-
ness or illegal pesticide residues in the crop. If you have
any questions about calibration, you should contact state
extension service specialists, equipment manufacturers, or
other experts.
The system must be properly calibrated (with water only) to
ensure that the amount of Prowl 3.3 EC applied corre-
sponds to the recommended rate. Apply Prowl 3.3 EC in
1/2 to 3/4 inches of water during the first sprinkler set (use
at least 1 inch of water in the states of Texas, New Mexico
and Oklahoma). Maintain agitation in the injection nurse
tank to keep a uniform herbicide suspension during appli-
cation. When application is complete, flush the system with
water.
Chemigation Instructions (for low volume micro
sprinklers)
Output of low volume sprinkler = 4 to 50 gallons per hour
(gph) per emitter. Point of application MUST be above
ground.
Irrigation system should run a sufficient amount of time
prior to Prowl 3.3 EC injection to have all emitters func-
tioning properly. After system is operating properly, length
of injection should be such that at one period of time
during the injection, the first and last emitters in the system
contain Prowl 3.3 EC-treated water. Add Prowl 3.3 EC to
the supply tank already filled with the volume of water
required for the injection period. Maintain proper agitation
in Prowl 3.3 EC injection tank. Prowl 3.3 EC should be
mixed in clean water and injected down-line from filters.
Following Prowl 3.3 EC injection, system should be
flushed for a period of time sufficient to clear the line of
Prowl 3.3 EC. (If Prowl 3.3 EC application is made during
a normal irrigation cycle, injection should be made during
the last stage.)
Chemigation Calibration (for low volume micro
sprinklers)
Calculation of use rate is based on wetted area around
emitters - NOT on tree acres. To determine correct
amount of Prowl 3.3 EC, use the following formula:
1. Treated area per each emitter = A
A = 3.14 x (radius x radius)
2. The area in square feet
wet in each acre = B B = A x emitters/acre
144
3. The total area (in square feet) wet by your system = C
C = B x acres covered by system.
4. Rate per treated acre of Prowl 3.3 EC
(based on length of control desired) = R
Amount of
Prowl 3.3 EC
to inject = S
S =
C
x R = qts of Prowl 3.3 EC
43,560
Example:
If the average distance from emitter to perimeter of wet-
ted area measured one inch below soil surface is
13 inches, then
A = 3.14 x (13" x 13"),
and A = 530.7 square inches.
If there are 300 emitters per acre, then
B =
530.7 x 300
and B = 1105.6 square feet
wetted per acre.144
If the system covers 20 acres, then
C =
C =
1105.6 square feet per acre x 20 acres and
22,112 square feet wetted by system.
If the desired application rate per treated acre is 2.4 qts of
Prowl 3.3 EC, then
S =
22,112
x 2.4 and S =
1.2 qts of Prowl 3.3 EC
should be injected into the
system.43,560
Special Instructions for Chemigation
1. DO NOT apply when wind speed favors drift beyond
the area intended for treatment.
2. DO NOT connect an irrigation system used for pesticide
application to a public water system unless the pesticide
label-prescribed safety devices for public water systems
are in place.
3. A person knowledgeable of the chemigation system and
responsible for its operation, or under the supervision of
the responsible person, shall shut the system down and
make necessary adjustments should the need arise.
4. The pesticide injection pipeline must contain a function-
al, automatic quick-closing check valve to prevent the
flow of fluid back toward the injection pump. It must also
contain a functional, normally closed solenoid-operated
valve located on the intake side of the injection pump
and connected to the system interlock to prevent fluid
from being withdrawn from the supply tank when the
irrigation system is either automatically or manually shut
down.
5. The sprinkler chemigation system must contain a func-
tional check valve, vacuum relief valve, and low-pressure
9
drain appropriately located on the irrigation pipeline to
prevent water source contamination from backflow. In
addition, systems must use a metering pump, such as a
positive displacement injection pump (e.g. diaphragm
pump) effectively designed and constructed of materials
that are compatible with pesticides and capable of
being fitted with a system interlock.
6. The sprinkler chemigation system must contain func-
tional interlocking controls to automatically shut off the
pesticide injection pump when the water pump motor
stops, or in cases where there is no water pump, when
the water pressure decreases to the point where pesti-
cide distribution is adversely affected.
7. The irrigation line or water pump must include a func-
tional pressure switch that will stop the water pump
motor when the water pressure decreases to the point
where pesticide distribution is adversely affected.
Chemigation Systems Connected to Public Water
Systems
1. Public water system means a system for the provision to
the public of piped water for human consumption if such
system has at least 15 service connections or regularly
serves an average of at least 25 individuals daily at least
60 days out of the year.
2. Chemigation systems connected to public water sys-
tems must contain a functional, reduced-pressure zone
backflow preventer (RPZ) or the functional equivalent in
the water supply line upstream from the point of pesti-
cide introduction. As an option to the RPZ, the water
from the public water system should be discharged into
a reservoir tank prior to pesticide introduction. There
shall be a complete physical break (air gap) between the
outlet end of the fill pipe and the top or overflow rim of
the reservoir tank of at least twice the inside diameter of
the fill pipe.
3. All chemigation systems connected to public water sys-
tems must also follow restrictions listed in the preceding
section titled Chemigation.
Applications via Flooded Basin Irrigation Systems
Prowl
® 3.3 EC herbicide may be applied via flooded
basin irrigation systems, but only to the following crops:
bearing and nonbearing fruit and nut trees, nonbearing
vineyards, and alfalfa grown for forage, hay or seed
production.
Use Instructions and Precautions for Flooded Basin
Irrigation
1. Prowl 3.3 EC may be applied through flooded basin
irrigation systems designed to uniformly distribute irri-
gation water along the soil surface. Solid set systems
utilizing tall riser for overhead application are excluded.
2. Follow all label recommendations for Prowl 3.3 EC
regarding rates per acre, timing of application, and
crop-specific restrictions and limitations.
3. DO NOT connect an irrigation system used for pesti-
cide application to a public water system unless the
pesticide label-prescribed safety devices for public
water systems are in place.
4. A person knowledgeable of the chemigation system
and responsible for its operation, or under the
supervision of the responsible person, shall shut the
system down and make necessary adjustments
should the need arise.
5. BASF recommends that Prowl 3.3 EC is mixed with
water at a 1:1 ratio in the injection nurse tank to assist
with product flowability. Maintain agitation in the injec-
tion nurse tank to keep a uniform herbicide
suspension during application. When application is
complete, flush the system with water.
6. Tail water (runoff water) from flood irrigation that con-
tains Prowl 3.3 EC should be re-circulated and
contained in the field of initial application or used only
on adjacent tree or vine crops or alfalfa for which
Prowl 3.3 EC is registered for this type of application.
7. Systems using a gravity-flow pesticide dispensing sys-
tem must meter the pesticide in the water at the head
of the field downstream of a hydraulic discontinuity,
such as a drop structure or weir box, to decrease
potential for water source contamination from backflow
water.
8. Systems utilizing a pressurized water and pesticide
injection system must meet the following
requirements:
• The system must contain a functional check valve,
vacuum-relief valve, and low-pressure drain appropri-
ately located in the irrigation pipe to prevent water
source contamination from backflow.
• The pesticide injection pipeline must contain a func-
tional automatic quick closing check valve to prevent
flow of fluids back towards the injection pump.
• The pesticide injection pipeline must also contain a
functional, normally closed solenoid-operated valve
located on the intake side of the injection pump and
connected to the system interlock to prevent fluid
from being withdrawn from the supply tank when the
irrigation system is either automatically or manually
shut down.
• The system must contain a functional interlocking
control to automatically shut off the pesticide injec-
tion pump when the water pump stops.
• The irrigation pipe or water pump must include a
functional pressure switch, which will stop the pump
motor when the water pressure decreases to the
point where pesticide distribution is adversely
affected.
• Systems must use a metering pump, such as a posi-
tive displacement injection pump (e.g. diaphragm
pump), of effective design and constructed of materi-
als that are compatible with pesticides and capable
of being fitted with a system interlock.
• Any alternative to the above safety devices must con-
form to the list of EPA-approved alternative devices.
9. Regularly measure the flow in the field to ensure the
correct amount of Prowl 3.3 EC is being metered into
the irrigation water and also regularly monitor to
ensure that treated water is being uniformly distributed
across the field. Flow rates through metering devices
and distribution of Prowl 3.3 EC can vary with water
temperature and speed of water flow across the field.
10
10. Uniform distribution of Prowl® 3.3 EC herbicide-
treated irrigation water is the sole responsibility of the
applicator and is required to avoid crop injury, lack of
herbicide effectiveness, or illegal pesticide residues in
the crop.
11. If you have questions about calibration, you should
contact state extension service specialists, equip-
ment manufacturers or other experts.
Mandatory Spray Drift Management
Ground Boom Applications
• Applicators must only apply with the nozzle height rec-
ommended by the manufacturer, but no more than 3 ft
above the ground or crop canopy.
• Applicators are required to use a medium or coarser
droplet size (ASAE S572).
• DO NOT apply when wind speeds exceed 15 mph at
the application site.
• DO NOT apply during temperature inversions.
Boomless Ground Applications
• Applicators are required to use a medium or coarser
droplet size (ASAE S572) for all applications.
• DO NOT apply when wind speeds exceed 15 mph at
the application site.
• DO NOT apply during temperature inversions.
Aerial Applications
• Applicators are required to use a medium or coarser
droplet size (ASABE S641).
• Applicators must use 1/2 swath displacement upwind
at the downwind edge of the field.
• Nozzles must be oriented so the spray is directed
toward the back of the aircraft.
• DO NOT release spray at a height greater than 10 ft
above the crop canopy, unless a greater application
height is necessary for pilot safety.
• DO NOT apply when wind speeds exceed 15 mph at
the application site. If the wind speed is greater than
10 mph, the boom length must not exceed 65% of the
wingspan for fixed wing aircraft or 75% of the rotor
diameter for helicopters. Otherwise, the boom length
must not exceed 75% of the wingspan for fixed wing
aircraft or 90% of the rotor diameter for helicopters.
• DO NOT apply during temperature inversions.
Spray Drift Advisories
The applicator is responsible for avoiding off-site spray
drift. Be aware of nearby nontarget sites and environmen-
tal conditions.
Importance of Droplet Size
An effective way to reduce spray drift is to apply large
droplets. Use the largest droplets that provide target pest
control. While applying larger droplets will reduce spray
drift, the potential for drift will be greater if applications are
made improperly or under unfavorable environmental
conditions.
Controlling Droplet Size - Ground Boom
• Volume - Increasing the spray volume so that larger
droplets are produced will reduce spray drift. Use the
highest practical spray volume for the application. If a
greater spray volume is needed, consider using a nozzle
with a higher flow rate.
• Pressure - Use the lowest spray pressure recommend-
ed for the nozzle to produce the target spray volume and
droplet size.
• Spray Nozzle - Use a spray nozzle that is designed for
the intended application. Consider using nozzles
designed to reduce drift.
Controlling Droplet Size - Aircraft
• Adjust Nozzles - Follow nozzle manufacturers recom-
mendations for setting up nozzles. Generally, to reduce
fine droplets, nozzles should be oriented parallel with the
airflow in flight.
Boom Height - Ground Boom
For ground equipment, the boom should remain level with
the crop and have minimal bounce.
Release Height - Aircraft
Higher release heights increase the potential for spray drift.
Boomless Ground Applications
Setting nozzle at the lowest effective height will help to
reduce the potential for spray drift.
Shielded Sprayers
Shielding the boom or individual nozzles can reduce spray
drift. Consider using shielded sprayers. Verify that the
shields are not interfering with the uniform deposition of
the spray on the target area.
Temperature and Humidity
When making applications in hot and dry conditions, use
larger droplets to reduce effects of evaporation.
Temperature Inversion
Drift potential is high during a temperature inversion. Tem-
perature inversions are characterized by increasing
temperature with altitude and are common on nights with
limited cloud cover and light to no wind. The presence of
an inversion can be indicated by ground fog or by the
movement of smoke from a ground source or an aircraft
smoke generator. Smoke that layers and moves laterally in
a concentrated cloud (under low wind conditions) indicates
an inversion, while smoke that moves upward and rapidly
dissipates indicates good vertical air mixing. Avoid applica-
tions during temperature inversions.
Wind
Drift potential generally increases with wind speed. AVOID
APPLICATIONS DURING GUSTY WIND CONDITIONS.
Applicators need to be familiar with local wind patterns
and terrain that could affect spray drift.
Sensitive Areas
This pesticide should only be applied when the potential
for drift to adjacent sensitive areas (e.g. residential areas,
bodies of water, known habitat for threatened or endan-
gered species, or nontarget crops or plants) is minimal
(e.g. when wind is blowing away from the sensitive areas).
11
Additives
Spray adjuvants have little or no influence on performance
of Prowl® 3.3 EC herbicide when applications are made
prior to weed emergence. However, several tank mixes
with Prowl 3.3 EC require adjuvants to improve burndown
of emerged weeds. Therefore, surfactants, liquid fertilizer
(28%, 30%, or 32% UAN (urea ammonium nitrate) or
ammonium sulfate), or crop oil concentrate may be used
with Prowl 3.3 EC tank mixes applied preplant, pre-
emergence, or early postemergence to the crop. Follow
the adjuvant recommendations on the tank mix partners
label.
When an adjuvant (or a specific adjuvant product, such as
a drift control agent) is to be used with this product, the
use of a Chemical Producers and Distributors Association
(CPDA) certified adjuvant is recommended. The recom-
mended adjuvants must contain ingredients accepted by
the EPA.
Tank Mixing Information
Prowl 3.3 EC may be applied in a tank mix or a sequential
application with other herbicides registered for use in a
given crop. Refer to the companion label for weeds con-
trolled in addition to Prowl 3.3 EC alone.
When using tank mixtures or sequential applications with
Prowl 3.3 EC, always read the companion product label(s)
to determine the specific use rates by soil types, weed
species, and weed or crop growth stage. In addition, fol-
low all precautions and restrictions including state and
local use restrictions that may apply to specific products.
Always follow the most restrictive label.
Uses with Other Products (Tank Mixes)
If this product is used in combination with any other prod-
uct except as specifically recommended in writing by
BASF, then BASF shall have no liability for any loss, dam-
age, or injury arising out of its use in any such combination
not so specifically recommended. If used in combination
recommended by BASF, the liability of BASF shall in no
manner extend to any damage, loss, or injury not directly
caused by the inclusion of the BASF product in such com-
bination use, and in any event shall be limited to return of
the amount of the purchase price of the product. Always
perform a mixing test to check the compatibility of
Prowl 3.3 EC with all potential tank mix partners.
Mixing Instructions
1. Fill tank 1/2 to 3/4 full with clean water or liquid fertilizer
and agitate. Prior to mixing Prowl 3.3 EC or
Prowl 3.3 EC tank mixtures in liquid fertilizer, refer to
appropriate label sections for recommended uses in
liquid fertilizer, application instructions, and compatibil-
ity determinations.
NOTE: Prowl 3.3 EC will NOT mix in high salt formu-
lation fertilizers, such as 10-34-0. When utilizing high
salt formulation fertilizers as the spray carrier, use one
of the following:
(a) Pre-slurry Prowl 3.3 EC in water prior to adding to
tank; use 1:1 ratio of water to Prowl 3.3 EC.
(b) Add water to fertilizer solution prior to adding
Prowl 3.3 EC. The amount of water should be
equal to or greater than the amount of
Prowl 3.3 EC to be used.
2. Prowl 3.3 EC Alone
When using Prowl 3.3 EC alone, add Prowl 3.3 EC
to the partially filled tank while agitating and then fill the
remainder of the tank with water or liquid fertilizer.
3. Prowl 3.3 EC Tank Mixes
Add the tank mixture ingredients in the order listed
below prior to adding Prowl 3.3 EC.
(for tank mixtures with Butyrac
® 200, Gramoxone®
Extra or glyphosate, see mixing instructions at the
end of this section):
(a) Wettable Powder (WP) formulations - Make a
slurry of the WP in water (1:2 ratio). Add the slurry
slowly into the partially filled tank while agitating.
(b) Dry Flowable (DF)/Water Dispersible Granule
(WDG) formulations - Add the granules to the
partially filled tank while agitating. Make a slurry of
the granules in water before adding to liquid
fertilizer.
(c) Flowable (F) formulations - Add the F formulation
to the partially filled tank while agitating.
(d) Water Soluble Concentrate (WSC)
formulations - Add the WSC formulation to the
partially filled tank while agitating.
(e) Emulsifiable Concentrate (EC) formulations  -
Add the EC formulation to the partially filled tank
while agitating.
After complete mixing, add Prowl 3.3 EC to the tank.
(f) NOTE: For tank mixes including Butyrac 200,
Gramoxone Extra or glyphosate: After complete
mixing of Prowl 3.3 EC, continue filling the sprayer
with water and add Butyrac or Gramoxone Extra
or glyphosate near the end of the filling process.
If Gramoxone Extra is included in the tank mixture,
add 8 ozs of non-ionic surfactant per 100 gallons of
total spray mixture as the last ingredient in the tank.
Fill the remainder of the tank with water or liquid fertilizer
while agitating.
4. Thorough and continuous sprayer-tank agitation
MUST be maintained during mixing and spraying of
Prowl 3.3 EC. If the spray mixture is allowed to settle
for any period of time, thorough agitation is essential to
resuspend the mixture before spraying is resumed.
Continue agitation while spraying.
Cleaning Spray Equipment
Clean application equipment thoroughly by using a strong
detergent or commercial spray cleaner according to the
manufacturers directions, and then triple rinsing the equip-
ment before and after applying this product.
12
Restrictions and Limitations
• DO NOT exceed the maximum labeled rate for any soil
type.
• Prowl® 3.3 EC herbicide will not control established
weeds. Destroy emerged weeds prior to application.
• Prowl 3.3 EC is most effective in controlling weeds
mechanically incorporated or when incorporated into the
weed germination zone by adequate rainfall or overhead
irrigation after application.
• When using tank mixtures with Prowl 3.3 EC, always
read the companion product label(s) to determine the
specific use rates by soil types, weed species, and weed
or crop growth stage. In addition, follow all precautions
and restrictions including state and local use restrictions
that may apply to specific products. Always follow the
most restrictive label.
• In the event of a crop loss due to adverse weather condi-
tions or other reasons, any crop registered for a preplant
incorporated application of Prowl 3.3 EC can be
replanted without adverse effects the same year (see
Crop-specific Information for exceptions). If replanting
is necessary, DO NOT work the soil deeper than the
treated zone.
• Refer to Crop-specific Information for crop-specific
preharvest intervals and feeding and grazing restrictions.
Crop Rotation Restrictions
• Use of Prowl 3.3 EC in accordance with label directions
is expected to result in normal growth of rotational crops
in most situations; however, various environmental and
agronomic factors, such as arid conditions, make it
impossible to eliminate all risks associated with the use
of this product and, therefore, rotational crop injury is
always possible. Soil characteristics and environmental
conditions which may contribute to crop stress that may
be accentuated by the use of Prowl 3.3 EC include:
coarse soils, compaction, high salinity, eroded knolls/
hilltops, cold and/or wet soils, drought, and heavy rainfall
soon after application.
• When Prowl 3.3 EC is used in tank mix or sequential
combinations, refer to labels of other herbicides for addi-
tional rotational crop restrictions.
• Restrictions for rotational cropping after the use
of Prowl 3.3 EC are dependent on the application
use rate of Prowl 3.3 EC in the primary crop. The
user should thoroughly read the following restric-
tions to determine the rotational crops for their
specific situation, according to application use
rate.
I. Rotational Crop Restrictions Following Applica-
tions of Prowl 3.3 EC to Field and Row Crops
1. Application Rate less than or equal to 4.8 pts/A
(2.0 lbs ai/A):
(a) Crops which are labeled for preplant incorporated
application may be planted the same season in
which Prowl 3.3 EC was applied.
(b) Sugar beets, Red beets and Spinach
To avoid crop injury, DO NOT plant sugar beets,
red beets or spinach for 12 months following a
spring application of Prowl 3.3 EC or 14 months
following a fall application of Prowl 3.3 EC.
These crops should not be planted for 18 months
following a spring application of Prowl 3.3 EC or
20 months following a fall application of
Prowl 3.3 EC if rainfall or irrigation was not suffi-
cient to produce a crop.
To ensure thorough mixing of soil prior to planting
sugar beets, red beets and spinach, land should be
plowed using a moldboard plow to a depth of
12 inches.
(c) Proso millet, Sorghum (milo), and Annual or
Perennial grass crops or mixtures
Proso millet, sorghum (milo), and annual or perenni-
al grass crops or mixtures should not be planted for
10 months after a spring application of
Prowl 3.3 EC or 12 months after a fall application
of Prowl 3.3 EC except in the following conditions:
In the states of Minnesota, North Dakota and
South Dakota, these crops should not be planted
for 18 months following a spring application of
Prowl 3.3 EC or 21 months following a fall applica-
tion of Prowl 3.3 EC.
To avoid the possibility of crop injury in areas that
receive less than 20 inches of rainfall or irrigation to
produce a crop, these crops should not be planted
for 18 months following a spring application of
Prowl 3.3 EC or 20 months following a fall applica-
tion of Prowl 3.3 EC if rainfall or irrigation was not
sufficient to produce a field or row crop.
(d) Wheat and Barley
Wheat and barley may be planted 4 months after
an application of Prowl 3.3 EC, except under the
following conditions:
If less than 12 inches of rainfall or overhead irriga-
tion was received between application and
rotational crop planting, wheat should not be plant-
ed before 12 months after a spring application of
Prowl 3.3 EC or 14 months after a fall application
of Prowl 3.3 EC.
In dryland areas and/or areas where irrigation is
necessary to produce the crop treated with
Prowl 3.3 EC, DO NOT plant winter wheat or
13
barley as a follow crop if crop failure/destruction
occurs and land is fallowed during the summer.
(e) All Other Rotational Crops Not Specifically
Addressed Above
Crops, other than those to which Prowl
® 3.3 EC
herbicide may be applied as a preplant incorpo-
rated treatment, may be planted the year following
application of Prowl 3.3 EC, except under the fol-
lowing condition:
If rainfall or irrigation was not sufficient to produce a
crop, delay planting for 18 months following a
spring application of Prowl 3.3 EC or 20 months
following a fall application of Prowl 3.3 EC.
2. Application Rate greater than 4.8 pts/A
(2.0 lbs ai/A):
In the growing season following application of
Prowl 3.3 EC to field and row crops at greater than
4.8 pts/A, plant only those crops for which
Prowl 3.3 EC is labeled for preplant incorporated
treatment or crop injury may occur. DO NOT plant
other crops for 24 months.
II. Rotational Crop Restrictions Following Applica-
tions of Prowl 3.3 EC to Orchard, Grove, and
Vineyard Crops
In the growing season following application of
Prowl 3.3 EC to bearing fruit and nut trees, plant only
those crops for which Prowl 3.3 EC is labeled for pre-
plant incorporated treatment or crop injury may occur.
DO NOT rotate to other crops (except for nut crops,
fruit trees, or grapes) for 24 months following a
Prowl 3.3 EC application to bearing fruit or nut trees.
Use Area
NORTHERN STATES
SOUTHERN STATES
Crop-specific Information
Crop Injury Disclaimer: Prowl 3.3 EC use may result in
crop injury, loss or damage to certain crops under a num-
ber of conditions, including but not limited to agronomic,
cultural, mechanical, and environmental. Numerous risks
of loss or damage to certain crops may be associated with
the use of Prowl 3.3 EC even when directions for use are
followed completely. The user or grower should take all
such risks into consideration before deciding to apply the
product. BASF recommends testing on a small por-
tion of the target crop to determine if damage is
likely to occur. Each grower who is considering the
product for such use should test Prowl 3.3 EC in order to
determine its suitability. A grower should use
Prowl 3.3 EC only to the extent that in his sole opinion the
benefit of Prowl 3.3 EC use outweighs the potential injury
to the growers crop.
In addition, many factors can affect crop growth and/or
yield, including but not limited to, insects, diseases, weed
competition, poor seed quality, improper planting depth,
mechanical cultivation, poor weather (such as freezing or
excessive wind, rain, heat, or cold), lack of or excessive
moisture, crusting, fertility, or hardpans. Risk of loss or
damage to crops may be associated with the use of
Prowl 3.3 EC and contribute to poor stands due to failure
of crop to emerge, swelling of roots or other below-ground
plant parts, less vigorous plant growth and development,
and reduction in yield potential. Prowl 3.3 EC may also
cause injury to sensitive rotational crops.
ALFALFA
(Grown for Forage, Hay, or Seed Production)
Prowl 3.3 EC may be applied by ground, air, chemigation,
flooded basin irrigation systems, or on dry bulk fertilizer.
Use Methods, Timings and Rates
Established Alfalfa for Forage/Hay (defined as alfalfa
planted in the fall or spring that has gone through a first
cutting/mowing):
Uniformly apply Prowl 3.3 EC at a broadcast rate of 1.2 to
4.8 quarts per acre prior to weed emergence. Applications
can be made in the fall after the last mowing/cutting,
during winter dormancy, in the spring, or between cuttings.
Applications should be made prior to the alfalfa reaching
6 inches in regrowth.
Established Alfalfa Grown for Seed Production (defined as
alfalfa planted in the fall or spring that has gone through a
summer season of cutting/mowing):
Uniformly apply Prowl 3.3 EC at a broadcast rate of 1.2 to
4.8 quarts per acre prior to weed emergence in one of the
following ways:
1. Apply to dormant established alfalfa.
2. Apply before alfalfa exceeds 10 inches in height after
first mowing/beating.
3. Once the alfalfa reaches 10 inches in height or if the
alfalfa has been mowed/beaten two or more times,
Prowl 3.3 EC must be applied with drop nozzles
directing the spray so that there is little to no contact
with the foliage.
Seedling Alfalfa (defined as alfalfa planted in the fall or
spring which has NOT gone through a cutting/mowing):
Uniformly apply Prowl 3.3 EC at a broadcast rate of 1.2 to
2.4 pints per acre prior to weed emergence. Applications
can be made once the seedling alfalfa has reached the
2nd trifoliate stage of growth. Applications should be made
prior to the alfalfa reaching 6 inches in growth.
14
Alfalfa Stand Establishment: Apply Prowl® 3.3 EC
herbicide at a broadcast rate of 1.2 to 1.8 pints per acre
as a preplant incorporated or preemergence treatment in
direct-seeded alfalfa. Some crop stand reduction and
stunting may occur with this use of Prowl 3.3 EC; howev-
er, reduced weed competition will allow establishment of a
quality stand. Use the lower rates on coarse-texture soil or
in lower rainfall areas (receiving less than 20 inches of rain-
fall and irrigation a year).
- Preplant incorporated: Uniformly incorporate
Prowl 3.3 EC into the top 2 to 3 inches of the final seed-
bed prior to planting.
- Preemergence: Apply directly after drill seeding alfalfa.
Alfalfa should be planted into a seedbed that is firm and
free of clods.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions .
Flooded Basin Irrigation Systems
Prowl 3.3 EC may be applied in flooded basin irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering Flooded
Basin Irrigation in Spraying Instructions .
Restrictions and Limitations
• DO NOT exceed 4.8 quarts of Prowl 3.3 EC per acre in
any one crop season.
• Follow all precautions and restrictions on the labels of all
products applied in combination with Prowl 3.3 EC.
Always follow the most restrictive label.
• DO NOT apply Prowl 3.3 EC less than 50 days prior to
alfalfa harvest for forage or hay.
• DO NOT apply Prowl 3.3 EC less than 90 days prior to
alfalfa harvest for seed.
• Some stunting and chlorosis of the alfalfa may
occur with postemergence applications.
• Applications made after the alfalfa exceeds 6 inch-
es in height may result in poor weed control due to
possible reduced spray coverage to the soil.
BEARING FRUIT AND NUT TREES
Prowl 3.3 EC may be applied in the following individual
crops within the fruit tree and tree nut crop groupings:
Citrus Fruit Crop Grouping
calamondin
citrus citron
citrus hybrids
grapefruit
kumquat
lemon
lime
mandarin (tangerine)
orange (sweet and sour)
pummelo
satsuma mandarin
tangelo
Tree Nuts Crop Grouping
almond
beech nut
Brazil nut
butternut
cashew
chestnut
chinquapin
filbert (hazelnut)
hickory nut
macadamia nut
pecan
pistachio
walnut
Pome Fruits
Crop Grouping
Stone Fruits
Crop Grouping
apple
crabapple
loquat
mayhaw
pear
pear, oriental
quince
apricot
aprium
cherry, sweet
cherry, tart
nectarine
peach
plum
plum, chicksaw
plum, Damson
plum, Japanese
plumcot
pluot
prune
Other Fruit Trees
pomegranate and Juneberry
Use Methods, Timings and Rates
Prowl 3.3 EC may only be applied by ground, chemiga-
tion, or flooded basin irrigation systems.
Prowl 3.3 EC may be applied either in a single application
or sequentially with an interval of 30 days or more. Apply
Prowl 3.3 EC at between 2.4 to 4.8 quarts per acre
(depending on desired length of control, see chart below)
per application, but not to exceed a total of 4.8 quarts/A
per year in pome, stone and other fruit trees, and not to
exceed a total of 7.2 quarts/A per year in citrus and nut
trees.
Prowl 3.3 EC Use Rate per Acre:
Short-term control 2.4 quarts
Long-term control 4.8 quarts
Ground Applications - Prowl 3.3 EC may be applied
surface incorporated or (surface) preemergence.
Apply Prowl 3.3 EC as a broadcast or banded treatment
using ground equipment before weed emergence. Apply
the spray directly to the ground beneath the trees and/or in
areas between rows. DO NOT apply over the top of trees
with leaves or buds or fruit. Contact by the spray mixture
with leaves, shoots, or buds may cause injury.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions . DO NOT apply
Prowl 3.3 EC-treated irrigation water over top of trees
15
with leaves or buds or fruit. Contact with leaves, shoots, or
buds by spray mixture may cause injury.
Flooded Basin Irrigation Systems
Prowl® 3.3 EC herbicide may be applied in flooded
basin irrigation systems. Follow all recommendations, spe-
cial instructions and precautions in the general section
Flooded Basin Irrigation in Spraying Instructions .
Restrictions and Limitations
• DO NOT apply more than 4.8 quarts of Prowl 3.3 EC
per acre per year in pome, stone and other fruit trees.
• DO NOT apply more than 7.2 quarts of Prowl 3.3 EC
per acre per year in citrus and nut trees.
• DO NOT apply by air.
• DO NOT feed forage or graze livestock in treated groves
or orchards.
• DO NOT apply within 1 day of harvest of citrus fruit.
• DO NOT apply within 60 days of harvest of pome and
stone fruit or other tree fruit.
• DO NOT apply within 60 days of harvest of nuts, except
almonds.
• DO NOT apply within 120 days of harvest of almonds.
• DO NOT apply to newly seeded nursery stock.
CARROTS
Prowl 3.3 EC may be applied by ground, air, or
chemigation.
Use Methods, Timings and Rates
Preemergence - Make a single broadcast application by
ground or by air or by chemigation at 2.4 pints per acre of
Prowl 3.3 EC as a postplant treatment prior to emergence
of the crop and before weed emergence. Apply as a pre-
emergence treatment within 2 days after planting.
Layby - Prowl 3.3 EC may be applied only by ground
equipment at layby (last mechanical cultivation) at 2.0 pints
per acre as a directed spray to the soil between rows.
Prowl 3.3 EC should be applied prior to weed emer-
gence. Emerged weeds will not be controlled by this
treatment. DO NOT allow the spray to contact carrot
plants or injury may occur. DO NOT apply layby applica-
tions by chemigation or by air.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions . DO NOT allow
Prowl 3.3 EC-treated irrigation water to contact carrot
plants.
DO NOT apply tank mixtures through any type of irrigation
system unless the label instructions on chemigation of all
products are followed.
Restrictions and Limitations
• DO NOT apply more than 2.4 pints per acre per season.
• DO NOT apply within 60 days of harvest.
• DO NOT feed forage or graze livestock in treated fields.
• DO NOT apply as a broadcast spray over top of carrots
or crop injury may result.
• DO NOT apply layby applications by chemigation or by
air.
CARROTS GROWN FOR
SEED PRODUCTION
Prowl 3.3 EC may be applied only by layby.
Use Methods, Timings and Rates
Last Cultivation (Layby) - Apply Prowl 3.3 EC following
the last normal mechanical cultivation (layby) at a rate of
1.2 to 4.8 pints per acre (on a broadcast basis). Uniformly
apply as a directed spray to the soil between rows.
DO NOT allow the spray to contact carrot plants or injury
may occur. Use protective shields to avoid contact with
carrot foliage. Use properly calibrated and accurate noz-
zles and equipment.
Layby applications can be applied to carrots previously
treated with herbicides registered in/on carrots. Consult
the labels of those herbicides for suggested treatments,
rates to be used, and precautions or restrictions for use in
carrots and for follow crop restrictions.
Restrictions and Limitations
• DO NOT apply as a broadcast spray over top of carrots
or crop injury may result.
• DO NOT apply layby applications by chemigation or by
air.
• DO NOT apply within 60 days of carrot seed harvest.
• DO NOT feed, forage or graze livestock in treated fields.
• DO NOT harvest carrots for food or feed use.
SPECIAL CROP USE RESTRICTIONS
The pesticide applicator, the producer of the crop, and the
seed conditioner must be aware that use of this product
according to this labeling is deemed a nonfeed/nonfood
use. If the applicator of this pesticide is not the producer,
the applicator should provide a copy of this labeling to the
producer of the crop. Producers of this crop who use this
product, or cause the product to be used on a field they
operate, should provide a copy of this pesticide label to the
seed conditioner.
Consequently, no portion of this carrot seed crop, includ-
ing but not limited to green chop, hay, pellets, meal, whole
seed, cracked seed, roots, bulbs, foliage and seed screen-
ings, may be used or distributed for food or feed purposes.
Processed carrot seed from a field treated with this prod-
uct must bear a specific tag or conspicuous container
labeling, or if shipped in bulk, on the shipment invoice or
bill of lading, with the following statement: “Not for human
consumption or animal feed.” All seed screenings from
seed processing shall be disposed of in such a manner
that the screenings cannot be distributed or used for
human food or animal feed purposes.
The seed conditioner shall keep records of screening dis-
posal for three years from the date of disposal and shall
furnish the records immediately upon request. Conditioner
16
disposal records shall consist of documentation of on-farm
disposal, disposal at a controlled dumpsite, incinerator,
composter or other equivalent disposal site and shall
include the lot numbers, amount of material disposed of,
the grower(s), and the date of disposal.
CORN
(Field, Pop, Seed, Sweet)
Prowl® 3.3 EC herbicide may be applied by ground, air
or chemigation.
Prowl 3.3 EC may be applied in conventional, minimum,
or no-till as a preemergence, postemergence, or poste-
mergence incorporated (CULTI-SPRAY) application in field
corn.
Prowl 3.3 EC may be applied in conventional tillage as a
preemergence or postemergence application in sweet
corn, seed corn, or popcorn.
Regardless of tillage system, plant corn at least
1 -1/2 inches deep and completely cover with soil.
In conventional tillage systems, plant into a seedbed that is
firm and free of clods and trash. Use only where adequate
tillage is practiced to provide good soil coverage of the
corn seed.
In no-till systems, utilize a no-till planter that is capable of
planting through crop residue. The use of no-till planters
under conditions that do not allow good soil coverage of
the corn seed can result in reduced crop stand or injury if
Prowl 3.3 EC contacts the germinating corn seed. Check
equipment to ensure good seed coverage.
Prowl 3.3 EC or Prowl 3.3 EC tank mix combination
treatments are most effective in controlling weeds when
adequate rainfall or overhead irrigation is received within
7 days after application. If cultivation is necessary because
of soil crusting or weed germination, use shallow tillage
and make certain corn seeds are below the tilled area.
Additional Weeds Controlled: In addition to the weeds
listed in Table 1, Prowl 3.3 EC will control the following
weeds in corn with CULTI-SPRAY application:
wild proso millet and shattercane.
Use Methods and Timings
Preemergence - Apply after planting but before weeds
and crop emerge.
Postemergence - Apply postemergence until field corn is
30 inches tall (20 to 24 inches tall for pop, seed and sweet
corn) or in the V8 growth stage, whichever is more restric-
tive. If the corn canopy prevents applications from reaching
the soil, use drop nozzles and apply as a directed spray.
CULTI-SPRAY - Apply Prowl 3.3 EC alone or
Prowl 3.3 EC plus atrazine when field corn is at least
4 inches tall until last cultivation (layby). Prowl 3.3 EC plus
atrazine must be applied before the field corn reaches
12 inches in height.
DO NOT exceed 1.2 lbs ai per acre of atrazine, as
specified on the atrazine label. Under situations of low
rainfall or soil moisture when deep germinating weeds
such as shattercane or field sandbur are anticipated,
mechanical incorporation will provide best results. If culti-
vation is needed after application and incorporation of
Prowl 3.3 EC, the depth of cut should be no deeper than
the depth of cut used to incorporate.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions .
Use Rates
Preemergence or Postemergence Applications
Soil Texture
Organic Matter
< 1.5%
(pts/A)
1.5% to 3.0%
(pts/A)
> 3.0%
(pts/A)
Coarse 1.8 to 2.4 2.4 to 3.6 3.6
Medium 2.4 to 3.6 3.6 3.6 to 4.8
Fine 2.4 to 3.6 3.6 to 4.8 3.6 to 4.8
CULTI-SPRAY Applications - Field Corn ONLY
Soil Texture Southern States 1
(pts/A)
Northern States 1
(pts/A)
Coarse 1.2 to 1.8 1.8 to 2.4
Medium 1.8 to 2.4 2.4 to 3.6
Fine 1.8 to 3.6 2.4 to 3.6
1 See Restrictions and Limitations for map of specific states.
Restrictions and Limitations
• DO NOT apply Prowl 3.3 EC in reduced, minimum or
no-till sweet corn, seed corn or popcorn.
• DO NOT apply Prowl 3.3 EC in no-till in California.
• DO NOT apply preplant incorporated.
• DO NOT apply postemergence in liquid fertilizer.
• Livestock can graze or be fed forage from treated corn
after 21 days following application.
• DO NOT exceed one application per crop season at the
highest rate per acre for any given soil type and applica-
tion method.
COTTON
Prowl 3.3 EC may be applied by ground, air, or chemiga-
tion in conventional, minimum, stale seedbed, or no-till as
a preplant surface, preplant incorporated, preemergence,
or layby application in cotton.
Preplant surface, preemergence, and layby treatments are
most effective in controlling weeds when adequate rainfall
or overhead irrigation is received within 7 days after appli-
cation. A shallow cultivation is recommended if soil
crusting or soil compaction occurs. If weeds begin to ger-
minate or adequate moisture is not received within 7 days
17
after application, use shallow tillage (rotary hoe or light har-
row) and make sure cotton seeds are below tilled area.
The use of a postemergence herbicide treatment may be
required to control weed escapes at planting or following
cotton emergence.
Additional Weeds Suppressed: In addition to the
weeds listed in Table 1, Prowl
® 3.3 EC herbicide will
suppress Russian thistle in the state of Arizona.
Use Methods and Timings
Preplant Surface - Apply Prowl 3.3 EC up to 15 days
prior to planting. Apply Prowl 3.3 EC tank mixes and
sequential programs as specified under the tank mix
section.
Preplant Incorporated - Apply Prowl 3.3 EC up to
60 days prior to planting and incorporate within 7 days of
application. Apply Prowl 3.3 EC tank mixes and sequen-
tial programs as specified under the tank mix section.
Preemergence - Apply Prowl 3.3 EC at planting or up to
2 days after planting. Apply to a seedbed that is firm and
free of clods. Apply Prowl 3.3 EC tank mixes and sequen-
tial programs as specified under the tank mix section.
Preplant Incorporated followed by Preemergence  -
Apply Prowl 3.3 EC up to 60 days prior to planting and
incorporate within 7 days of application. Apply overlay
application of Prowl 3.3 EC at planting or up to 2 days
after planting. Total amount of Prowl 3.3 EC applied per
acre cannot exceed the highest labeled rate for a given soil
type. Preplant incorporated and preemergence applica-
tions of Prowl 3.3 EC may be applied with the labeled
tank mix herbicide(s).
Layby Application (at last cultivation) - Apply
Prowl 3.3 EC directly to the soil between rows as a direct-
ed spray following the last normal cultivation (layby). Layby
applications can be applied in cotton previously treated
with Prowl 3.3 EC or any herbicide(s) registered for use in
cotton. Consult the labels of those herbicides for suggest-
ed treatments, rates to be used, and precautions or
restrictions for use in cotton, and for follow-crop restric-
tions. The total amount of Prowl 3.3 EC applied per acre
per season cannot exceed the highest labeled rate for a
given soil type.
DO NOT apply as a broadcast spray over the top of the
cotton or SERIOUS CROP INJURY CAN RESULT.
AVOID CONTACT OF THE SPRAY to the non-woody
portion of cotton stems and to cotton foliage or SERIOUS
CROP INJURY CAN RESULT. To reduce the potential for
crop injury caused by herbicide contact with cotton foliage
and stems, use protective shields when conditions favoring
spray drift occur.
Glyphosate-containing products may be applied with
Prowl 3.3 EC at layby in cotton with the Roundup
Ready
® gene. DO NOT apply glyphosate-containing
products at layby on non-Roundup Ready cotton.
DO NOT apply Prowl 3.3 EC and glyphosate tank mix
as a broadcast spray over the top of cotton or CROP
INJURY MAY RESULT.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions .
Fall Application - Prowl 3.3 EC may be applied for
weed control in cotton in the fall after October 15 (up to
140 days prior to planting cotton) in Arizona, California,
Louisiana, New Mexico, Mississippi, Oklahoma and Texas.
Apply Prowl 3.3 EC at the broadcast rate of 2.4 pints per
acre on coarse or medium soils and 3.6 pints per acre on
fine soils.
Use Rates
Soil Texture
Conventional
or Minimal Tillage
(pts/A)
No-till2
(pts/A)
Coarse 1.2 to 2.4 1 1.8 to 2.4
Medium 1.8 to 2.4 2.4 to 3.6
Fine 2.4 to 3.6 3.6 to 4.8
1 DO NOT exceed 1.8 pts/A on coarse-textured soils in California.
2 Not recommended for soils with more than 3% organic matter.
Restrictions and Limitations
• DO NOT apply Prowl 3.3 EC in no-till in California.
• Preharvest Interval (PHI) is 60 days between the last
Prowl 3.3 EC application and harvest.
• DO NOT feed forage or graze livestock in treated cotton
fields.
• DO NOT exceed the highest seasonal rate per acre for
any given soil type.
EDIBLE BEANS
Dry, Lima, Snap, Chickpeas
(Garbanzo Beans), Southern Peas
(Cowpeas), and Sweet Lupines
Prowl 3.3 EC may only be applied (fall) preplant surface
or preplant incorporated in chickpeas (garbanzo beans),
dry beans, lima beans, snap beans, and Southern peas
(cowpeas). Prowl 3.3 EC may be applied (fall) preplant
surface or preplant incorporated or preemergence in
sweet lupines.
Use Methods and Timings
Preplant Incorporated - Apply up to 60 days prior to
planting and incorporate within 7 days of application.
Preemergence - Apply only to sweet lupines at planting
or up to 2 days after planting. Apply to a seedbed that is
firm and free of clods.
18
Use Rates
Soil Texture
Southern
States1
(pts/A)
Northern States 1
< 3% Organic Matter > 3%
(pts/A)
Coarse 1.8 2.4 2.4
Medium 2.4 3.0 3.6
Fine 3.6 3.6 3.6
1 See Restrictions and Limitations for map of specific states.
Fall Applications - Fall preplant surface and preplant
incorporated applications may be made in North Dakota,
South Dakota, Minnesota, Oregon, Washington, Montana,
Idaho, and Wyoming only. Rainfall or irrigation is required
for incorporation and activation. Unpredictable weed con-
trol can be expected since factors such as length of time
between application and planting as well as uncontrollable
weather factors will determine herbicide activity and
longevity.
Apply Prowl
® 3.3 EC herbicide and incorporate (rainfall,
irrigation or mechanically) in late fall prior to planting edible
beans [chickpeas (garbanzo beans)], dry beans (such as
navy, great northern, red kidney, black turtle, cranberry,
and small white type), lima beans, snap beans, Southern
peas (cowpeas), and sweet lupines the following spring.
Apply Prowl 3.3 EC in the late fall when soil temperatures
are 45° F or below but before the ground freezes.
DO NOT apply when the air temperature is below 45° F.
Preplant Surface and Preplant Incorporated
(Fall Application
1)
Use Rates
Soil Texture
Broadcast Rate
< 3% Organic
Matter
(pts/A)
Broadcast Rate
> 3% Organic
Matter
(pts/A)
Coarse 1.2 to 2.4 2.4
Medium 1.8 to 3.0 3.0 to 3.6
Fine 2.4 to 3.6 3.6
1 For use in North Dakota, South Dakota, Minnesota, Oregon,
Washington, Montana, Idaho, and Wyoming only.
Restrictions and Limitations
• DO NOT feed lupine hay and forage or graze livestock in
treated lupine fields.
• DO NOT apply Prowl 3.3 EC more than once per crop-
ping season.
• DO NOT apply in any type of irrigation system.
FORAGE LEGUMES
Prowl 3.3 EC may be used in forage legumes used as a
cover crop in federal set-aside or conservation reserve
program areas.
Some stand reduction of the legume cover crop may
occur with this use. Consult local county extension service
or the local ASC committee for recommended cover
crops.
If loss of cover crop occurs due to adverse weather condi-
tions, any crop registered for Prowl 3.3 EC preplant
incorporated use can be replanted the same year into
Prowl 3.3 EC-treated soil without adverse effects. If
replanting is necessary, DO NOT rework the soil deeper
than the Prowl 3.3 EC-treated zone. DO NOT feed or
graze legume cover crops established following
Prowl 3.3 EC application.
The cover crop residue should ultimately be destroyed by
tillage or left on the surface to retard erosion or as directed
by the local ASC committee.
Use Methods, Timings, and Rates
Prowl 3.3 EC may be applied preplant incorporated or
preemergence for weed control in legume cover crops.
Use Rates Preplant Incorporated or Preemergence
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.2 to 1.8
Medium 1.8 to 2.4
Fine 2.4 to 3.0
FRUITING VEGETABLES
Prowl 3.3 EC may be applied to the following fruiting veg-
etables: tomato, eggplant, groundcherry (Physalis spp.),
pepper (includes bell pepper, chili pepper, cooking pepper,
pimento, sweet pepper), pepino, tomatillo.
Use Methods and Timings
Uniformly apply Prowl 3.3 EC only by ground or air as a
broadcast preplant incorporated application, or as a
broadcast preplant surface appl ication prior to transplant-
ing fruiting vegetables, or as a post-directed application to
transplanted or established direct-seeded fruiting
vegetables.
DO NOT apply prior to direct-seeded fruiting vegetables.
DO NOT apply postemergence over the top of or to foli-
age of fruiting vegetables as severe injury may occur.
Prowl 3.3 EC can be applied as a post-directed spray on
the soil at the base of the plant, beneath plants, and
between rows. Avoid direct contact with foliage or stems.
Be sure roots of transplants are established. Following the
post-directed spray and when sufficient rainfall or irrigation
does not occur to activate the herbicide, mechanically
incorporate at the time of blocking and thinning or at
“layby.” Prowl 3.3 EC should be applied prior to weed
emergence. EMERGED WEEDS WILL NOT BE CON-
TROLLED BY THIS TREATMENT.
19
Use Rates
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.2 to 1.8
Medium 1.8 to 2.4
Fine 1.8 to 3.6
Restrictions and Limitations
• DO NOT apply more than 3.6 pints per acre per season.
• DO NOT apply within 70 days of harvest.
• DO NOT allow Prowl® 3.3 EC herbicide-treated soil to
come in contact with transplant area.
• DO NOT apply if row is to later be covered with plastic.
GARLIC
Prowl 3.3 EC may be applied preemergence, postemer-
gence, or split application by ground, air, or chemigation.
Use Methods and Timings
Preemergence - After planting but before crop and
weeds emerge.
Postemergence - 1st to 5th true-leaf growth stage.
Split Application - At both preemergence and postemer-
gence timings.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Apply between the 2nd and 9th true-leaf stage
(2nd to 6th true-leaf stage in California). DO NOT irrigate in
excess of 0.5 inch of water. Follow all recommendations,
special instructions and precautions in the general section
covering Chemigation in Spraying Instructions .
Use Rates
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.8
Medium 2.4
Fine 3.6
Restrictions and Limitations
• DO NOT exceed 3.6 pints per acre per crop (except
Idaho, Oregon, and Washington).
• DO NOT apply within 60 days of harvest in California
and within 45 days of harvest in all other states.
• DO NOT feed or graze these crops.
GRAIN SORGHUM
Uniformly apply Prowl 3.3 EC in water by ground equip-
ment or by aircraft.
Prowl 3.3 EC may be applied as a postemergence incor-
porated (CULTI-SPRAY) application in grain sorghum
grown in all states.
In addition, Prowl 3.3 EC may be applied early postemer-
gence in grain sorghum grown in states east of the
Mississippi River and in Arkansas, eastern Texas,
Louisiana, and the Missouri “bootheel.”
DO NOT apply Prowl 3.3 EC in grain sorghum preplant
incorporated or preemergence as serious crop injury can
result. DO NOT apply Prowl 3.3 EC in grain sorghum
more than once per crop season.
Additional Weeds Controlled: In addition to the weeds
listed in Table 1, Prowl 3.3 EC as a CULTI-SPRAY appli-
cation will control the following weeds in grain sorghum:
wild proso millet and shattercane.
Use Methods and Timings
CULTI-SPRAY: Prowl 3.3 EC treatments can be applied
from the 4-inch growth stage to as late as the last cultiva-
tion (layby) of grain sorghum. See specific directions for
(CULTI-SPRAY) application under Application
Instructions .
Early Postemergence: For use only in states east of the
Mississippi River plus Arkansas, eastern Texas, Louisiana,
and the “bootheel” of Missouri.
The seedbed should be firm and free of clods and trash.
Use only where adequate tillage is practiced to provide
good seed coverage. Plant grain sorghum at least
1 - 1/2 inches deep to ensure good seed coverage.
Use Rates
CULTI-SPRAY Application
Soil Texture Southern States 1
(pts/A)
Northern States 1
(pts/A)
Coarse 1.8 2.4
Medium 2.4 3.6
Fine 3.6 3.6
1 See Restrictions and Limitations for map of specific states.
Early Postemergence Application
Soil Texture Prowl 3.3 EC
Coarse DO NOT USE
Medium, Fine 2.4 pts/A
Restrictions and Limitations
• DO NOT apply Prowl 3.3 EC preplant incorporated or
preemergence.
• DO NOT apply Prowl 3.3 EC as a CULTI-SPRAY treat-
ment in grain sorghum planted in double row beds.
• DO NOT replant grain sorghum if crop loss occurs.
• DO NOT apply in liquid fertilizer.
• Livestock can graze or be fed forage from Prowl 3.3 EC-
treated grain sorghum fields after 21 days following
application.
20
GREEN ONIONS
(Leeks, Spring Onions or Scallions,
Japanese Bunching Onions, Green Shallots
or Green Eschalots)
Prowl® 3.3 EC herbicide may be applied preemergence,
postemergence, or split application by ground, air, or
chemigation.
Use Methods, Timings and Rates
Uniformly apply 2.4 pints per acre of Prowl 3.3 EC as a
broadcast spray to the soil surface as preemergence spray
or as a postemergence spray to the crop at the 2 to 3 true-
leaf stage at least 30 days before harvest. If Prowl 3.3 EC
is to be applied sequentially as both a preemergence and
postemergence spray, the preemergence spray must be
applied 30 days prior to the postemergence spray.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Apply at 2 to 3 true-leaf stage at least 30 days
before harvest. DO NOT irrigate in excess of 0.5 inch of
water. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions .
Restrictions and Limitations
• DO NOT apply more than 2.4 pints per acre per
application.
• DO NOT apply more than 4.8 pints per acre per season.
• DO NOT apply within 30 days of harvest.
• DO NOT feed forage or graze livestock in treated fields.
LENTILS AND PEAS
(English, Dry, Garden, Dwarf,
Green, Pigeon, and Edible Pod)
Prowl 3.3 EC may be applied (fall) preplant surface or
preplant incorporated for weed control in lentils and peas.
Use Methods and Timings
Preplant Incorporated - Prowl 3.3 EC may be applied
60 days prior to planting up to immediately before planting.
After application, rotary hoeing and shallow cultivation/
tillage can be practiced without reducing weed control.
Avoid tillage that will bring untreated soil to the surface.
Use Rates
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.8
Medium 2.4
Fine 3.6
Fall Applications - Fall preplant surface and preplant
incorporated applications may be made in North Dakota,
South Dakota, Minnesota, Oregon, Washington, Montana,
Idaho, and Wyoming only. Rainfall or irrigation is required
for incorporation and activation. Unpredictable weed con-
trol can be expected since factors such as length of time
between application and planting as well as uncontrollable
weather factors will determine herbicide activity and
longevity.
Apply Prowl 3.3 EC and incorporate (via rainfall, irrigation
or mechanically) in late fall prior to planting lentils or peas
(English, dry, garden, dwarf, green, pigeon, and edible
pod) the following spring. Apply Prowl 3.3 EC in the late
fall when soil temperatures are 45° F or below but before
the ground freezes.
DO NOT apply when the air temperature is below 45° F.
Preplant Surface and Preplant Incorporated
(Fall Application
1)
Use Rates
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.2 to 1.8
Medium 1.8 to 2.4
Fine 2.4 to 3.6
1 For use in North Dakota, South Dakota, Minnesota, Oregon,
Washington, Montana, Idaho, and Wyoming only.
Restrictions and Limitations
• DO NOT use in California.
• DO NOT apply Prowl 3.3 EC preemergence in peas.
• DO NOT apply Prowl 3.3 EC more than once per crop-
ping season.
• DO NOT apply to peas, lentils, pea or lentil forage, pea
silage, pea hay, or pea straw grown for livestock feed.
• DO NOT apply in any type of irrigation system.
• Any crop registered for a preplant incorporated applica-
tion of Prowl 3.3 EC can be double cropped after peas.
MINT
(Peppermint and Spearmint)
Prowl 3.3 EC may be applied by ground or air.
Use Methods and Timings
Make a single broadcast preemergence application of
Prowl 3.3 EC to mint at 1.8 pints to 4.8 pints per acre,
depending on soil texture (see chart below), to dormant
established mint before weed emergence. After a
Prowl 3.3 EC application, some temporary crop injury
may be observed early in the growing season as mint
breaks dormancy and begins to grow.
Prowl 3.3 EC will not cause crop injury when applied
according to the label under normal growing conditions.
Non-uniform application may result in injury to crops, poor
stands, or soil residues; conversely, uneven application
may reduce weed control. Diseases, cold weather, exces-
sive moisture, deep planting, low or high pH, salinity, or
drought may weaken seedlings and plants and make them
more susceptible to herbicidal damage.
21
Use Rates
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.8 to 2.4
Medium 2.4 to 4.8
Fine 2.4 to 4.8
Restrictions and Limitations
• DO NOT apply Prowl® 3.3 EC herbicide to “baby”
mint in the first year of growth and establishment.
• DO NOT apply to mint that has broken dormancy or
crop injury may result. Application to mint that is near
dormancy break can result in crop injury. Risk of crop
injury increases the closer application is to mint dorman-
cy break.
• DO NOT apply to mint stands that have been weakened
by age, disease, cold weather, excessive moisture, or
other factors that reduce crop vigor. Mint growing under
stress is more susceptible to herbicidal damage.
• DO NOT apply more than 4.8 pints per acre per season.
• DO NOT apply within 90 days of harvest.
• DO NOT allow livestock to graze on treated spent hay or
feed treated spent hay to livestock.
• DO NOT apply this product on mint through any type of
irrigation system.
• DO NOT use in California except as directed in supple-
mental labeling.
NONBEARING FRUIT AND NUT TREE
CROPS and NONBEARING VINEYARDS
Prowl 3.3 EC may be applied for preplant incorporated,
preplant surface, surface incorporated or preemergence
weed control in several nonbearing fruit and nut tree crops
and nonbearing vineyards. Prowl 3.3 EC may be used
before or after transplanting the following nonbearing
crops:
almond
apple
apricot
cherry
citrus
grape
grapefruit
lemon
nectarine
orange
peach
pear
pecan
pistachio
plum
prune
tangelo
tangerine
walnut, English
Apply the spray directly to the ground beneath the trees or
vines. DO NOT apply over the top of trees or vines with
leaves or buds. Contacting leaves, shoots, or buds with
the spray mixture may cause malformed plant tissue.
DO NOT apply to newly seeded nursery stock.
FOR NEWLY TRANSPLANTED AND ONE-YEAR-OLD
GRAPEVINES:
• Apply only to dormant grapevines.
• DO NOT apply if buds have started to swell. Application
after buds have started to swell may result in leaf
distortion.
• DO NOT apply to newly transplanted trees or vines until
ground has settled and no cracks are present.
Use Methods, Timings and Rates
Prowl 3.3 EC may be applied by ground, air, chemigation
or flooded basin irrigation systems.
Prowl 3.3 EC may be applied either in a single application
or sequentially with an interval of 30 days or more. Apply
Prowl 3.3 EC at 2.4 to 4.8 quarts per acre (depending on
desired length of control, see chart below) per application,
but not to exceed a total of 4.8 quarts/A per year in pome,
stone and other fruit trees, and not to exceed a total of
7.3 quarts/A per year in citrus, nut trees and grapevines.
Preplant Surface - Prior to transplanting, uniformly apply
with ground or aerial equipment. Avoid root contact with
treated soil when placing transplants into the hole or injury
may occur.
Preplant Incorporated - Uniformly apply Prowl 3.3 EC
prior to transplanting but before weeds emerge. Incorpo-
rate Prowl 3.3 EC to a depth of 1 to 2 inches. Application
and incorporation must be made prior to transplanting to
avoid mechanical injury to the crop. Avoid root contact
with treated soil when placing transplants into the hole or
injury may occur.
Preemergence (postplant) - Applications may be in a
band or broadcast.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions . DO NOT apply
Prowl 3.3 EC-treated irrigation water over top of trees or
vines with leaves or buds.
Flooded Basin Irrigation Systems
Prowl 3.3 EC may be applied in flooded basin irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering Flooded
Basin Irrigation in Spraying Instructions .
Use Rate per Acre
Short-term control 2.4 quarts
Long-term control 4.8 quarts
Restrictions and Limitations
• DO NOT feed forage or graze livestock in treated fields.
• DO NOT apply more than 4.8 quarts of Prowl 3.3 EC
per acre per year in pome, stone and other fruit trees.
• DO NOT apply more than 7.3 quarts of Prowl 3.3 EC
per acre per year in citrus, nut trees and grapevines.
22
ONIONS
(Direct-Seeded and Transplanted Dry Bulb)
and SHALLOTS (Dry Bulb)
Prowl® 3.3 EC herbicide may be applied by ground, air
or chemigation.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Apply between the 2nd and 9th true-leaf stage
(2nd to 6th true-leaf stage in California) unless otherwise
specified below. DO NOT irrigate in excess of 0.5 inch of
water. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions .
Mineral Soils
Use Rates, Methods and Timings
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.8
Medium 2.4
Fine 3.6
State-Specific Instructions
In All States Except California:
Apply Prowl 3.3 EC as a broadcast treatment when
onions or shallots have 2 to 9 true leaves.
Additional Use in Colorado, Kansas, and Nebraska:
Prowl 3.3 EC may be applied sequentially in seeded
onions. Apply first application of Prowl 3.3 EC at loop
stage. Apply sequential application of Prowl 3.3 EC early
postemergence (2nd to 9th true-leaf stage). DO NOT
exceed the maximum labeled rate for a given soil texture.
DO NOT apply Prowl 3.3 EC at loop stage through the
9th true-leaf stage if heavy rains are expected, or severe
crop injury may result.
Additional Use in Colorado and the High Plains of
Texas:
For transplanted onions only, apply and shallow incorpo-
rate (less than 2 inches deep) Prowl 3.3 EC into
preformed beds prior to transplanting.
Additional Use in Idaho, Oregon, and Washington:
Apply Prowl 3.3 EC as a broadcast treatment when
onions or shallots are between the flag leaf to 9th true-leaf
stage.
Prowl 3.3 EC may be used at 3.6 to 4.8 pints per acre for
dodder control on medium- and fine-textured soils.
DO NOT apply Prowl 3.3 EC using chemigation at the
dodder control rate.
Prowl 3.3 EC may be applied in the fall or spring to the
furrow area of land bedded in the fall in preparation for
planting seed of dry bulb onions the following spring.
Apply Prowl 3.3 EC as a banded application at rates
based on appropriate soil texture. Band width should be
approximately 1/2 the width of the row spacing. Keep
Prowl 3.3 EC away from the area where onion seed will
be planted. Harrow-off tops of beds following
Prowl 3.3 EC furrow applications prior to planting onions.
For selective weed control in the onion row, apply
Prowl 3.3 EC as a banded postemergence application to
flag leaf onions at the labeled rates based on soil texture.
Apply Prowl 3.3 EC only once to the furrow area and
once to the onion row as a postemergence application.
Additional Use in Michigan:
For mineral soils containing >10% organic matter, follow
the directions for muck soils (see following).
In California:
Prowl 3.3 EC may only be applied as a single application
when onions or shallots have 2 to 6 true leaves.
Restrictions and Limitations (Mineral Soils)
• DO NOT mechanically incorporate except as specified
for use on dry bulb onions in Colorado and the Texas
High Plains.
• DO NOT exceed 3.6 pints per acre per crop (except
Idaho, Oregon, and Washington).
• DO NOT apply within 60 days of harvest in California
and within 45 days of harvest in all other states.
• DO NOT feed or graze these crops.
• DO NOT apply Prowl 3.3 EC preemergence through
the loop stage if heavy rains are expected or severe crop
injury may result. If irrigating immediately after
Prowl 3.3 EC application at the preemergence through
loop stage, DO NOT irrigate in excess of 0.5 inch of
water.
Muck Soils
Use Rates, Methods and Timings
Prowl 3.3 EC may be applied sequentially on muck soils
as follows:
Application Timing and Growth Stage Rate
(pts/A)
Preemergence through Loop Stage 4.8
Early Postemergence (2nd to 6th true-leaf stage) 4.8
Late Postemergence (6th to 9th true-leaf stage) 4.8
Restrictions and Limitations (Muck Soils)
• DO NOT apply to muck soils in California.
• DO NOT apply within 45 days of harvest.
• DO NOT feed or graze these crops.
• DO NOT apply more than 14.4 pints per acre per grow-
ing season on muck soils. To maximize crop safety,
ensure good soil coverage during planting or transplant-
ing and delay preemergence applications to the loop
stage, if possible.
• DO NOT apply Prowl 3.3 EC preemergence through
the loop stage if heavy rains are expected or severe crop
injury may result. If irrigating immediately after
Prowl 3.3 EC application at the preemergence through
loop stage, DO NOT irrigate in excess of 0.5 inch of
water.
23
• DO NOT plant sugar beets, red beets, spinach, winter
wheat, or winter barley as rotational crops on muck soils
for 12 months from the time of last application if more
than 3.6 pints per acre of Prowl
® 3.3 EC herbicide is
applied to the onion crop.
• If loss of onion crop occurs, DO NOT replant any crop
other than onions in muck soil during the same cropping
year and DO NOT work the soil deeper than 2 inches.
PEANUTS
Prowl 3.3 EC may be applied by ground, air, or
chemigation.
Prowl 3.3 EC may be applied preplant incorporated in
peanuts.
Prowl 3.3 EC may also be applied preemergence to pea-
nuts grown under overhead irrigation.
DO NOT use in California.
Use Methods and Timings
Preplant Incorporated - Apply Prowl 3.3 EC up to
60 days prior to planting and incorporate within 7 days
after applications.
Preemergence - Apply Prowl 3.3 EC at planting or up to
2 days after planting and before crop emergence. To pre-
vent decreased crop pegging, adequate incorporation
must be achieved by applying a minimum of 0.75 inch of
overhead irrigation or rainfall within 48 hours of application.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions .
Use Rates
Region Rate
(pts/A)
Texas, Oklahoma and New Mexico 1.2 to 2.4
Other peanut growing states* 2.4
* For heavy weed infestations, especially of Texas panicum, up to
3.6 pts/A of Prowl 3.3 EC can be used in Alabama, Georgia or
Florida.
POTATOES
Prowl 3.3 EC may be applied by ground, air, or
chemigation.
Prowl 3.3 EC may be applied preemergence, pre-
emergence incorporated, or early postemergence in
potatoes.
Additional Weeds Controlled: In addition to the weeds
listed in Table 1, Prowl 3.3 EC will control stinging nettle
in potatoes.
Use Methods and Timings
Preemergence - Apply Prowl 3.3 EC after planting, but
before potatoes and weeds emerge, or after dragoff.
Preemergence Incorporated - Apply Prowl 3.3 EC and
incorporate after planting but before potatoes and weeds
emerge. Where dragoff is practiced, apply Prowl 3.3 EC
and incorporate before, at, or after dragoff, but before
potatoes and weeds emerge. Incorporate Prowl 3.3 EC
within 7 days of application. Prowl 3.3 EC must be thor-
oughly and uniformly incorporated into the top 1 to
2 inches of soil. Mechanical incorporation is not required if
adequate rainfall for good crop and weed emergence
occurs or irrigation is received within 7 days after applica-
tion. Care must be taken so that incorporation equipment
does not damage seed pieces or elongating sprouts.
Early Postemergence - Apply Prowl 3.3 EC from crop
emergence to the 6-inch stage of growth. DO NOT apply
Prowl 3.3 EC postemergence if potatoes are under stress
from cold/wet or hot/dry conditions or crop injury may
occur.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Apply Prowl 3.3 EC preemergence after plant-
ing, after dragoff, or early postemergence through sprinkler
irrigation systems. Follow all recommendations, special
instructions and precautions in the general section cover-
ing Chemigation in Spraying Instructions .
Use Rates
Soil Texture < 3% Organic Matter > 3%
(pts/A)
Coarse 1.8 1.8
Medium 2.4 3.6
Fine 3.6 3.6
Restrictions and Limitations
• DO NOT apply to sweet potatoes or yams.
• DO NOT apply preplant.
• DO NOT make more than one application of
Prowl 3.3 EC per season.
• Application of Prowl 3.3 EC on White Rose variety pota-
toes during or followed by cool and/or wet weather
conditions may result in crop injury.
RICE
Prowl 3.3 EC may be applied as a pre-flood, pre-
emergence application in dry-seeded or drilled rice or as a
delayed preemergence application in drilled dry-seeded
rice or as an early postemergence application in
dry-seeded rice. Treatments may be applied to conven-
tional, reduced or minimum tillage, and no-till (stale
seedbed) rice. The seedbed should be firm and free of
clods and must be prepared to allow for good seed cover-
age. The use of a planter under conditions that do not
allow good soil coverage of the rice seed can result in
24
reduced stand or stunting if Prowl® 3.3 EC herbicide
contacts germinating rice seed.
Additional Weeds Controlled: In addition to the weeds
listed in Table 1, Prowl 3.3 EC will control the following
weeds in rice:
junglerice and sprangletop.
Use Methods and Timings
Pre-Flood, Preemergence - Prowl 3.3 EC may be
applied for preemergence weed control as a pre-flood,
pre-rice germination herbicide in lightly incorporated
dry-seeded rice or on drilled rice.
SEEDING DIRECTIONS: For all rice seed incorporation
methods, seed must be incorporated shallowly or no more
than 1 inch below soil surface. Seed left on the surface
may be injured or killed by Prowl 3.3 EC. However, it is
recommended that 15 to 20% of seed total be visible
at surface in order to ensure that seed is not cov-
ered too deeply. Seeding rates should be increased by a
percentage corresponding to the amount of seed left on
the surface. Adjust seeding ratios to meet individual prac-
tices, incorporation depths and field conditions.
EXAMPLE: Target seeding rate is 150 lbs per acre. If
approximately 15% of seed is left on soil surface, seeding
rate should then be increased 22.5 lbs per acre to
177.5 lbs per acre.
Seeding depths can be affected by soil textures, tillage
practices, irrigation, and methods of mechanical incorpo-
ration. Seed that is incorporated either mechanically
and/or by irrigation flush must remain at a shallow depth of
no more than 1 inch below the soil surface. Fields where
rice seed is incorporated too deeply will experience
reduced crop stands.
Following are examples of typical implements that can be
used for rice seed incorporation: rice roller/ridger, ring roll-
er, light harrow, or flat roller. Regardless of the implement
or method of incorporation used, seed incorporation must
be less than 1 inch below the soil surface.
After rice seed is incorporated, uniformly apply to soil sur-
face as broadcast spray the tank mixture of Prowl 3.3 EC
at 2.4 pints per acre plus FirstChoice
® SafeGuardTM
spray adjuvant at 1.6 pints per acre. Use of
Prowl 3.3 EC without tank mixing with FirstChoice
SafeGuard spray adjuvant can result in crop injury and
loss of rice stand.
After herbicide application, flush field with irrigation water
with method best employed to facilitate a thorough soak-
ing of field and a rapid drain. Tail water (runoff water) from
flood irrigation that contains Prowl 3.3 EC should be
re-circulated and contained in the field of initial application
or used only on adjacent crops for which Prowl 3.3 EC (or
other pendimethalin-based products) is registered for use.
Rice seed covered with water for longer than 8 days may
result in reduced stand and weed control.
Delayed Preemergence - Apply Prowl 3.3 EC alone or
with tank mix partner for delayed preemergence weed
control in grain-drilled, dry-seeded rice. Apply
Prowl 3.3 EC alone or in tank mixture to levees after the
levees are pulled and planted. Exposed seeds that come
in contact with Prowl 3.3 EC may be injured. Apply only
when growing conditions favor vigorous rice growth. The
seedbed should have adequate moisture for seed germi-
nation. Not for use in California.
Uniformly apply the recommended rate of Prowl 3.3 EC
after rice planting and before rice and weed emergence
(spiking). Apply after the rice seed has absorbed water and
germinated and after the soil has been previously sealed
over the seed by at least 1 inch of rainfall or by irrigation
(flush). If the soil has not been sealed by rain or flush, apply
when 80 percent of germinated seeds have a primary root
(radicle) or shoot at least 1/2-inch long. If there is insuffi-
cient moisture, flushing is recommended before
Prowl 3.3 EC application to supply moisture for root (radi-
cle) initiation and for vigorous rice and weed growth.
If applied to soil prior to these conditions or to cracked soil,
stand reduction or stunting of rice may occur. Under some
conditions, use of gibberellic acid-treated seed, heavy rain-
fall after application, or flushing after application may result
in herbicide injury to rice. Rice can overcome moderate
injury with appropriate cultural practices.
Due to the residual activity of Prowl 3.3 EC, this treatment
may be applied if rice is too small to maintain a flood on
the field for weed control. However, proper water manage-
ment practices must be followed for normal rice growth
and activity of Prowl 3.3 EC.
Early Postemergence - Apply Prowl 3.3 EC as a tank
mix partner. Base applications on weed and crop size
guidelines of the tank mix partner. DO NOT apply to fields
with standing water. If necessary, fields may be flushed
prior to treatment to produce vigorous rice and weed
growth. Since soil and weeds must be completely exposed
to spray coverage, no flood water should be on the field at
the time of application. Cloddy soil, standing water (pud-
dles) at the time of application, or cracks in the soil that
form after application may result in reduced weed control.
Because of residual activity of Prowl 3.3 EC, this treat-
ment may be applied if rice is too small to maintain a flood
on the field for weed control. However, proper water man-
agement practices must be followed for normal rice
growth and activity of Prowl 3.3 EC.
Since the residual activity of Prowl 3.3 EC is activated by
moisture, Prowl 3.3 EC is most effective in controlling
emerging weeds when adequate rainfall or irrigation (flush)
is received within 7 days after application.
25
Use Rates
Delayed Preemergence Applications
Soil Texture Rate
(pts/A)
Sands, loamy sands DO NOT USE
Sandy loams 1.8
Loams, silt loams, silts, sandy clay
loams 2.4
Silty clay loams, clay loams, sandy
clays, silty clays, clays 2.4
Early Postemergence Application
Soil Texture Rate
(pts/A)
Coarse 1.8
Medium 2.4
Fine 2.4
Restrictions and Limitations
• DO NOT apply Prowl® 3.3 EC herbicide as a pre-
flood, preemergence treatment in rice unless tank mixed
with FirstChoice
® SafeGuardTM spray adjuvant.
• DO NOT apply Prowl 3.3 EC through any type of irriga-
tion system.
• DO NOT apply in liquid fertilizer.
• DO NOT use on water-seeded rice except as specified
in other BASF labeling.
• DO NOT apply to rice fields if fields are used for fish pro-
duction, especially catfish or crayfish farming.
• DO NOT use water containing Prowl 3.3 EC residues
from rice cultivation to irrigate food or feed crops that are
not registered for use with Prowl 3.3 EC.
• In case of a crop failure due to weather conditions or dis-
ease following treatment with Prowl 3.3 EC alone or in a
tank mixture, only drilled dry-seeded rice may be imme-
diately replanted; however, the grower assumes all risks
and consequences associated with replanting of rice
because there is the potential for stand reduction or
stunting. A 10 percent increase in seeding rate is recom-
mended. Replant seed below the herbicide layer
because reduced stand or stunting may occur if
Prowl 3.3 EC contacts germinating rice seed. DO NOT
replant with gibberellic acid-treated seed. DO NOT reap-
ply Prowl 3.3 EC alone or in a tank mixture.
• DO NOT apply Prowl 3.3 EC and then flush for
germination.
• DO NOT apply to stressed rice. Stress factors include
cold or hot temperature extremes, excessive moisture or
drought, problem soils, poor field drainage, or deep
water after application.
• DO NOT apply early preemergence nor preplant incor-
porated as severe rice injury is possible.
• DO NOT feed forage or graze livestock in treated fields.
SOYBEANS
Prowl 3.3 EC may be applied in conventional, minimum,
or no-till as a fall surface, fall incorporated, preplant sur-
face, preplant incorporated, or preemergence application
in soybeans.
Additional Weeds Controlled: In addition to the weeds
listed in Table 1, Prowl 3.3 EC will control or reduce com-
petition from the following weeds in soybeans:
itchgrass and red rice. For specific rates for red rice and
itchgrass management, see table at end of this section.
Use Methods and Timings
Fall Applied - Prowl 3.3 EC may be surface applied or
incorporated in the fall, after fall harvest and prior to
ground freeze in states north of I-80 and the entire states
of Iowa, Illinois, Indiana, Kansas, Kentucky, Missouri,
Nebraska, Ohio, Oklahoma, and Texas. Fall applications of
Prowl 3.3 EC will not provide season-long weed control.
Preplant Surface - Apply Prowl 3.3 EC up to 15 days
prior to planting. Prowl 3.3 EC may be applied up to
45 days prior to planting when used in a tank mix or
applied sequentially with Extreme
®, Raptor®, or Pursuit®
herbicides. Apply Prowl 3.3 EC tank mixes and sequen-
tial programs as specified under the tank mix section.
Preplant Incorporated - Apply Prowl 3.3 EC up to
60 days prior to planting and incorporate within 7 days
after application.
Preemergence - Apply Prowl 3.3 EC at planting or up to
2 days after planting. Apply to a firm seedbed free of
clods. DO NOT make applications of Prowl 3.3 EC pre-
emergence north of Interstate 80, except in the states of
Indiana, Michigan and Ohio, or as specified in BASF sup-
plemental labeling.
Use Rates
Fall Surface, Fall Incorporated,
Preplant Surface, or Preplant Incorporated
Soil Texture < 3% Organic Matter > 3%
(pts/A)
Coarse 1.8 2.4
Medium 3.0 1 3.6
Fine 3.6 3.6
1 DO NOT exceed 2.1 pts for southern states; see Restrictions and
Limitations for map of specific states.
2 For heavy clay soils, apply Prowl 3.3 EC at the broadcast rate of
3.6 pints per acre.
Preemergence Applications
Soil Texture < 3% Organic Matter > 3%
(pts/A)
Coarse 1.8 1.8
Medium 2.4 2.4
Fine 2.4 3.0
26
Preplant Incorporated Applications
for Red Rice Control and Itchgrass Suppression
Soil Texture < 3% Organic Matter > 3%
(pts/A)
Coarse 3.6
Medium 3.6
Fine 4.8
1 This use is not recommended for soils with more than 3% organic
matter.
Restrictions and Limitations
• DO NOT APPLY POSTEMERGENCE or serious crop
injury can result.
• DO NOT use Prowl
® 3.3 EC herbicide in soybeans in
California.
• Livestock can graze or be fed forage from treated soy-
bean fields.
• DO NOT apply within 85 days of harvest.
• DO NOT exceed one application per crop season at the
highest rate per acre for any given soil type and applica-
tion method.
STRAWBERRY
Prowl 3.3 EC may be applied by ground, air, or
chemigation.
Use Methods and Timings
Stunting, reduced growth, or reduction in daughter plants
may occur with this use. Uniformly apply 1.8 to 3.6 pints
per acre of Prowl 3.3 EC as a broadcast spray to the soil
surface at pre-transplant time. A second application of
1.8 to 3.6 pints per acre of Prowl 3.3 EC may be applied
in a band to the soil between crop rows 35 days before
harvest, but DO NOT CONCENTRATE THE RATE per
acre into the treated area and DO NOT allow spray to con-
tact strawberry plants. The second application rate is
based on per unit of treated area.
Chemigation Applications
Prowl 3.3 EC may be applied through sprinkler irrigation
systems. Follow all recommendations, special instructions
and precautions in the general section covering
Chemigation in Spraying Instructions . DO NOT allow
Prowl 3.3 EC-treated irrigation water to contact straw-
berry plants.
Use Rates
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.8
Medium 2.4 to 3.0
Fine 3.0 to 3.6
Restrictions and Limitations
• DO NOT apply more than 3.6 pints per acre per
application.
• DO NOT apply more than 7.2 pints per acre per season.
• DO NOT apply within 35 days of harvest.
• DO NOT feed forage or graze livestock in treated fields.
• DO NOT apply if row is to later be covered with plastic.
SUGARCANE
Use Methods and Timings
Prowl 3.3 EC may be applied preemergence through
layby to plant or ratoon sugarcane. Applications may be
made band or broadcast. Although there may be adequate
crop tolerance for postemergence applications at layby,
the spray must be directed under the sugarcane canopy in
order to obtain effective weed control.
Prowl 3.3 EC must be thoroughly and uniformly incorpo-
rated into the soil with either (a) mechanical incorporation
equipment as outlined below, or (b) with rainfall or irriga-
tion, if rainfall or irrigation is adequate for good crop and
weed emergence and received within 7 days after applica-
tion. If rainfall or irrigation is not obtained, Prowl 3.3 EC
should be mechanically incorporated.
Mechanical Incorporation
Prowl 3.3 EC should be applied to loosened beds and
incorporated into the top 1 to 2 inches of soil within 7 days
after application.
Use Rates
Use Area Broadcast Rate1
(pts/A)
All states, except Hawaii 4.8 to 7.2
Muck soils (Florida only) 4.8 to 9.7
Hawaii 4.8 to 9.7
1 Use the high rate if: clay soils; no mechanical incorporation is
planned; heavy weed populations are anticipated; itchgrass infesta-
tion is anticipated; shaving is planned.
Restrictions and Limitations
• DO NOT exceed 14.4 pints of Prowl 3.3 EC per acre in
one growing season.
• DO NOT use less than 11 gallons of water as a carrier
when applying Prowl 3.3 EC for weed control.
• Ratoon sugarcane must be lightly shaved in early spring
to remove the old stubble before incorporation over the
line of sugarcane is possible. Carefully adjust equipment
to incorporate without causing excessive damage to
emerging shoots.
• DO NOT make aerial applications at close-in because
complete and uniform coverage cannot be obtained.
• DO NOT apply through any type of irrigation system.
• DO NOT apply within 90 days of harvest.
• DO NOT graze treated fields or feed treated forage or
fodder to livestock.
27
SUNFLOWERS
Prowl® 3.3 EC herbicide may be applied preplant incor-
porated in all states. Fall preplant incorporated applications
may be made in North Dakota, South Dakota and Minne-
sota only. Prowl 3.3 EC may be applied preemergence in
conventional tillage sunflowers, except in the state of
California.
Plant sunflowers 1.5 inches to 2 inches deep and
completely cover with soil.
Use Methods and Timings
Preplant Incorporated (Spring) - Apply up to 60 days
prior to planting and incorporate within 7 days after
application.
Preplant Incorporated (Fall applications in North
Dakota, South Dakota and Minnesota) - Apply
Prowl 3.3 EC and immediately incorporate in late fall prior
to planting sunflowers the following spring. Apply
Prowl 3.3 EC in the late fall when soil temperatures are
45° F or below but before the ground freezes. DO NOT
apply when the air temperature is below 45º F.
Prior to sunflower planting in the spring, fields treated with
Prowl 3.3 EC should receive at least one shallow addi-
tional incorporation. Spring incorporation should be at an
angle to the last tillage operation.
Preemergence - Apply Prowl 3.3 EC at planting or up to
2 days after planting. Preemergence applications of
Prowl 3.3 EC to sunflowers may increase the likelihood of
crop injury, especially when sunflowers are grown in stress
situations, such as compacted soils. Decreased herbicide
performance compared to preplant incorporated applica-
tions may also result from a preemergence application. If
dry conditions with limited precipitation exist or unseason-
ably cool temperatures following planting are forecast,
apply Prowl 3.3 EC prior to planting and mechanically
incorporate with tillage.
Use Rates
Preplant Incorporated (Spring) or
Preemergence (Conventional Tillage)
Soil Texture
Southern
States1
(pts/A)
Northern States
< 3% Organic Matter > 3%
(pts/A)
Coarse 1.8 2.4 2.4
Medium 2.4 3.0 3.6
Fine 3.6 3.6 3.6
1 See Restrictions and Limitations for map of specific states.
Preplant Incorporated (Fall) Application 1
Soil Texture < 3% Organic Matter > 3%
(pts/A)
Coarse 3.0 3.0
Medium 3.6 4.2
Fine 4.2 4.2
1 For use in North Dakota, South Dakota and Minnesota only.
NO-TILL SUNFLOWERS
Prowl 3.3 EC may be applied at 3.6 pints per acre up to
30 days before planting (preplant) to immediately after
planting (preemergence).
Prowl 3.3 EC is most effective in controlling weeds when
adequate rainfall or overhead irrigation is received within
7 days after application.
Restrictions and Limitations (all tillage types)
• DO NOT apply Prowl 3.3 EC postemergence.
• DO NOT feed forage or graze livestock in treated sun-
flower fields.
• DO NOT use in California.
TOBACCO
Prowl 3.3 EC may be applied preplant incorporated or as
a layby application in transplanted tobacco.
Use Methods and Timings
Preplant Incorporated - Apply Prowl 3.3 EC with
ground sprayer up to 60 days prior to transplanting tobac-
co and incorporate within 7 days after application.
Applied according to directions and under normal growing
conditions, Prowl 3.3 EC will not harm transplanted
tobacco. Under stress conditions for plant growth such as
cold/wet or hot/dry weather, Prowl 3.3 EC can produce a
temporary retardation of tobacco development.
Layby - Prowl 3.3 EC may be applied as a directed spray
following the last normal cultivation (layby), usually 4 to
6 weeks after transplanting tobacco. Apply Prowl 3.3 EC
in a 16- to 24-inch band between the crop rows. The spray
should not contact tobacco plants.
28
Use Rates
Preplant Incorporated Application
Use Area Soil Texture Rate
(pts/A)
Florida
Georgia
Maryland
North
Carolina
South
Carolina
Virginia
Coarse 2.4
Medium
sandy clay loams,
loams
silt loams, silts
2.4
3.0
Fine 3.0
Other states
Coarse 2.4
Medium 3.6
Fine 3.6
Layby Application
Soil Texture Broadcast Rate
(pts/A)
Coarse 1.8
Medium 2.4
Fine 2.4
Restrictions and Limitations
• DO NOT apply as a broadcast spray as contact may
cause malformed tobacco leaves.
WHEAT
Prowl® 3.3 EC herbicide may be applied by ground or
air.
Prowl 3.3 EC may be applied preemergence, delayed
preemergence, or postemergence to wheat for weed con-
trol in fall, winter or spring seeded wheat.
Use Methods and Timings
Apply to a seedbed that is firm and free of clods and trash.
The seedbed MUST be prepared to ensure good seed
coverage by the soil and seed-to-soil contact. Use high
quality seed. When applications of Prowl 3.3 EC are
intended to be made preemergence or delayed pre-
emergence, plant seed at least 1 inch deep to avoid
possible crop injury, but not too deep for proper germina-
tion. When applications of Prowl 3.3 EC are intended to
be made postemergence, plant seed at least 0.5 inch to
1.0 inch to avoid crop injury.
Uniformly apply Prowl 3.3 EC as a preemergence, or
delayed preemergence (after wheat seed has germinated),
or postemergence treatment from the 1st-leaf stage of
wheat until before the flag leaf is visible/emerged for weed
control. Prowl 3.3 EC should be applied prior to weed
emergence. EMERGED WEEDS WILL NOT BE CON-
TROLLED BY THIS TREATMENT. Adequate rainfall or
irrigation within 7 days after application will provide the
most consistent weed control.
For control of established weeds, Prowl 3.3 EC may be
tank mixed with any postemergence herbicide registered
for use in wheat. Prowl 3.3 EC will provide residual con-
trol of the weeds listed in this label. Always perform a
mixing test to check the compatibility of Prowl 3.3 EC
with all potential tank mix partners.
Use Rates
Soil Texture Southern States 1
(pts/A)
Northern States 1
(pts/A)
Coarse 1.8 to 2.4 1.8
Medium 1.8 to 3.6 3.0
Fine 2.4 to 3.6 2.4 to 3.6
1 See Use Area map in Restrictions and Limitations .
Restrictions and Limitations
• DO NOT apply more than 3.6 pints per season.
• NOTE: If loss of grain crop occurs, any crop registered
for Prowl 3.3 EC preplant incorporated use may be
replanted the same year without adverse effects.
DO NOT replant wheat.
• DO NOT apply Prowl 3.3 EC within 60 days of harvest
of wheat grain or straw.
• DO NOT apply Prowl 3.3 EC within 28 days of harvest
of wheat hay.
• DO NOT apply Prowl 3.3 EC within 11 days of harvest
of wheat forage.
29
© 2025 BASF Corporation
All rights reserved.
000241-00337 .20211214f.NVA 2021-04-129-0219
Supersedes: NVA 2016-04-129-0016
BASF Corporation
26 Davis Drive
Research Triangle Park, NC 27709
Conditions of Sale and Warranty
The Directions For Use of this product reflect the
opinion of experts based on field use and tests. The
directions are believed to be reliable and must be
followed carefully. However, it is impossible to eliminate
all risks inherently associated with the use of this
product. Crop injury, ineffectiveness or other unintended
consequences may result because of such factors as
weather conditions, presence of other materials, or use
of the product in a manner inconsistent with its labeling,
all of which are beyond the control of BASF
CORPORATION (“BASF”) or the Seller. To the extent
consistent with applicable law, all such risks shall be
assumed by the Buyer.
BASF warrants that this product conforms to the
chemical description on the label and is reasonably fit for
the purposes referred to in the Directions For Use ,
subject to the inherent risks, referred to above.
TO THE EXTENT CONSISTENT WITH APPLICABLE
LAW, BASF MAKES NO OTHER EXPRESS OR
IMPLIED WARRANTY OF FITNESS OR
MERCHANTABILITY OR ANY OTHER EXPRESS OR
IMPLIED WARRANTY.
TO THE EXTENT CONSISTENT WITH APPLICABLE
LAW, BUYERS EXCLUSIVE REMEDY AND BASFS
EXCLUSIVE LIABILITY, WHETHER IN CONTRACT,
TORT, NEGLIGENCE, STRICT LIABILITY, OR
OTHERWISE, SHALL BE LIMITED TO REPAYMENT
OF THE PURCHASE PRICE OF THE PRODUCT.
TO THE EXTENT CONSISTENT WITH APPLICABLE
LAW, BASF AND THE SELLER DISCLAIM ANY
LIABILITY FOR CONSEQUENTIAL, EXEMPLARY,
SPECIAL OR INDIRECT DAMAGES RESULTING
FROM THE USE OR HANDLING OF THIS
PRODUCT.
BASF and the Seller offer this product, and the Buyer
and User accept it, subject to the foregoing Conditions
of Sale and Warranty which may be varied only by
agreement in writing signed by a duly authorized
representative of BASF.
1108
Extreme, Prowl, Pursuit, and Raptor are registered
trademarks of BASF.
Butyrac is a registered trademark of Albaugh, Inc.
FirstChoice is a registered trademark, and Safeguard is
a trademark of Loveland Products, Inc.
Gramoxone is a registered trademark of a Syngenta
Group Company.
Roundup Ready is a registered trademark of Bayer
CropScience.