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# HM-1604 Herbicide
- EPA Reg No: **5905-643**
- Registrant: HELENA AGRI-ENTERPRISES, LLC, D/B/A HELENA CHEMICAL COMP
- Signal word: Danger
- Active ingredients: Dicamba (10.8%); 2,4-D (29.1%)
- Label accepted: 2021-12-02
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/005905-00643-20211202.pdf
---
Registration Notice Unconditional v.20150320
U.S. ENVIRONMENTAL PROTECTION AGENCY
Office of Pesticide Programs
Registration Division (7505P)
1200 Pennsylvania Ave., N.W.
Washington, D.C. 20460
EPA Reg. Number:
5905-643
Date of Issuance:
12/2/21
NOTICE OF PESTICIDE:
X Registration
Reregistration
Term of Issuance:
Unconditional
(under FIFRA, as amended)
Name of Pesticide Product:
HM-1604 Herbicide
Name and Address of Registrant (include ZIP Code):
Helena Agri-Enterprises, LLC
225 Schilling Blvd. Suite 300
Collierville, TN 38017
Note: Changes in labeling differing in substance from that accepted in connection with this registration must be submitted to and accepted by the
Registration Division prior to use of the label in commerce. In any correspondence on this product always refer to the above EPA registration number.
On the basis of information furnished by the registrant, the above named pesticide is hereby registered
under the Federal Insecticide, Fungicide, and Rodenticide Act.
Registration is in no way to be construed as an endorsement or recommendation of this product by the
Agency. In order to protect health and the environment, the Administrator, on his motion, may at any
time suspend or cancel the registration of a pesticide in accordance with the Act. The acceptance of any
name in connection with the registration of a product under this Act is not to be construed as giving the
registrant a right to exclusive use of the name or to its use if it has been covered by others.
This product is unconditionally registered in accordance with FIFRA section 3(c)(5) provided that you:
1. Submit and/or cite all data required for registration/reregistration/registration review of your
product when the Agency requires all registrants of similar products to submit such data.
2. Submit one copy of the revised final printed label for the record before you release the product
for shipment.
Continues page 2
Signature of Approving Official:
Mindy Ondish, Product Manager 23
Herbicide Branch, Registration Division (7505P)
Date:
12/2/21
EPA Form 8570-6
Page 2 of 2
EPA Reg. No. 5905-643
Decision No. 563335
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 FIFRA 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.
If these conditions are not complied with, the registration will be subject to cancellation in accordance
with FIFRA section 6. Your release for shipment of the product constitutes acceptance of these
conditions. A stamped copy of the label is enclosed for your records. Please also note that the record for
this product currently contains the following CSFs:
 Basic CSF dated 4/16/2021
 Alternate CSF A-B dated 4/26/2021
If you have any questions, please contact Julia Kerr by phone at 202-566-2810, or via email at
kerr.julia@epa.gov
Enclosure
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 1
Dicamba Acid GROUP 4 HERBICIDE
2,4 -D Acid GROUP 4 HERBICIDE
HM-1604 HERBICIDE
For control of a wide-spectrum of annual, biennial, and perennial broadleaf weeds and brush in Pasture s,
Rangelands and Grass (Hay, Silage); Conservation Re serve Program land; General Farmstead Areas; Post-
Harvest, Fallow, Crop Stubble and Set Aside Acres; Forest Management; Sorghum; Wheat; Roadsides,
Rights-of-way, Industrial Sites and similar Non-crop areas.
ACTIVE INGREDIENT(S): % by wt.
Dicamba acid: 3,6-dichloro-o-anisic acid*………………………… ……………………… 10.80 %
2,4-D acid: Dimethylamine salt of 2,4-dichlorophenoxyacetic acid**……….………… 29.10 %
OTHER INGREDIENTS:………....…………………………………………………………… 60.10 %
TOTAL ….……………………….................…………………………...... ...……… 100.00 %
Equivalent to:
*Dicamba Acid, 1.0 lbs./gal (CAS # 1918-00-9)
**2,4-D Acid equivalent, 2.3 lbs./gal (CAS # 94-75-7) Isomer specific by AOAC Method 6.D01-5 (12th E d.)
KEEP OUT OF REACH OF CHILDREN
WARNING / AVISO
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 t o explain it you in detail.).
FIRST AID
IF IN EYES:
 Hold eye open and rinse slowly and gently with wat er for 15-20 minutes.
 Remove contact lenses, if present, after first 5 m inutes, then continue rinsing eye.
 Call a poison control center or doctor for treatme nt advice
IF
SWALLOWED:
 Call a poison control center or doctor immediately for treatment advice.
 Have a person sip a glass of water if able to swal low.
 Do not induce vomiting unless told to do so by a p oison control center or doctor.
 Do not give anything by mouth to an unconscious or convulsing person.
IF INHALED:  Move person to fresh air.
 If person is not breathing, call 911 or an ambulan ce, then give artificial respiration,
preferably mouth-to-mouth if possible.
 Call a poison control center or doctor for further treatment advice.
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 1-800-424-9300 for emergency medical treatment
information.
NOTE TO PHYSICIAN: Probable mucosal damage may contraindicate the use of gastric lavage.
SEE INSIDE PANEL FOR ADDITIONAL PRECAUTIONS AND DIR ECTIONS FOR USE
EPA Reg. No. 5905-643 NET CONTENTS: ___________
EPA Est. No. ___________ AD XXXXXX
MANUFACTURED FOR
HELENA AGRI-ENTERPRISES, LLC
225 SCHILLING BOULEVARD, SUITE 300
COLLIERVILLE, TN 38017
12/02/2021
5905-643
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 2
PRECAUTIONARY STATEMENTS
HAZARDS TO HUMANS AND DOMESTIC ANIMALS
WARNING / AVISO
Causes substantial but temporary eye injury. Harm ful if swallowed or inhaled. Do not get in eyes or on
clothing. Wash thoroughly with soap and water aft er handling and before eating, drinking, chewing gu m,
using tobacco or using the toilet. Remove and wash contaminated clothing before reuse. Prolonged or
frequently repeated skin contact may cause allergic reactions in some individuals
PERSONAL PROTECTIVE EQUIPMENT (PPE)
All mixers, loaders, applicators, flaggers, and other handlers must wear:
1. Long-sleeved shirt and long pants.
2. Shoes and socks.
3. Chemical resistant gloves (made of barrier lami nate, butyl rubber ≥ 14 mils, neoprene rubber ≥ 14 mils,
polyvinyl chloride (PVC) ≥ 14 mils, or Viton ≥ 14 m ils) (except for applicators using groundboom
equipment, pilots, and flaggers)
4. Chemical resistant apron when applying with any handheld nozzle or equipment, mixing or loading,
cleaning up spills or equipment, or otherwise exposed to the concentrate.
5. Protective eyewear (goggles or face shield)
See engineering controls for additional requirements.
Follow manufacturer's instructions for cleaning/mai ntaining PPE. If no such instructions for washable s exist,
use detergent and hot water. Keep and wash PPE sep arately from other laundry. After each day of use,
clothing or PPE must not be re-used until it has been cleaned.
ENGINEERING CONTROLS
When handlers use enclosed cabs, or aircraft in a m anner that meets the requirements listed in the Wor ker
Protection Standard (WPS) for agricultural pesticid es [40 CFR 170.607 (e-f)], the handler PPE requirem ents
may be reduced or modified as specified in the WPS.
Pilots must use cockpits in a manner that meets the requirements, listed in the Worker Protection Stan dard
(WPS) for agricultural pesticides [40 CFR 170.607(f)].
USER SAFETY RECOMMENDATIONS
 Users should wash hands before eating, drinking, c hewing gum, using tobacco or using the toilet.
 Users should remove clothing/PPE immediately if pe sticide gets inside. Then wash thoroughly and
put on clean clothing.
 Users should 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
2,4-D is toxic to fish and aquatic invertebrates. D rift and runoff may be hazardous to aquatic organis ms in
water adjacent to treated areas.
Do not apply directly to water, to areas where surf ace water is present, or to intertidal areas below the mean
high water mark. Do not contaminate water when disposing of equipment wash water or rinsate.
2,4-D has properties and characteristics associated with chemicals detected in groundwater. The use of this
chemical in areas where soils are permeable, partic ularly where the water table is shallow, may result in
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 3
groundwater contamination. Application around a cis tern or well may result in contamination of drinkin g water
or groundwater.
Groundwater Contamination: Most cases of groundwater contamination involving phenoxy herbicides such
as 2,4-D have been associated with mixing/loading a nd disposal sites. Caution should be exercised when
handling 2,4-D pesticides at such sites to prevent contamination of groundwater supplies. Use of close d
systems for mixing or transferring this pesticide w ill reduce the probability of spills. Placement of the
mixing/loading equipment on an impervious pad to co ntain spills will help prevent groundwater
contamination.
Endangered Species Concerns: The use of any pesticide in a manner that may kill or otherwise harm and
endangered species or adversely modify their habitat is a violation of federal law.
PHYSICAL OR CHEMICAL HAZARDS
Do not use or store near any oxidizing or reducing agents.
DIRECTIONS FOR USE
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
Do not apply this product in a way that will contac t workers or other persons, either directly or thro ugh drift.
Only protected handlers may be in the area during a pplication. For any requirements specific to your S tate or
Tribe, consult the agency responsible for pesticide regulation. This labeling must be in the users p ossession
during application.
AGRICULTURAL USE REQUIREMENTS
Use this product only in accordance with its labeli ng and with the Worker Protection Standard, 40 CFR part
170. This Standard contains requirements for the p rotection of agricultural workers on farms, forests ,
nurseries, and greenhouses, and handlers of agricul tural pesticides. It contains requirements for tra ining,
decontamination, notification, and emergency assist ance. It also contains specific instructions and
exceptions pertaining to the statements on this lab el about personal protective equipment (PPE), and
restricted-entry interval. The requirements in thi s box only apply to uses of this product that are c overed by
the Worker Protection Standard.
Do not enter or allow worker entry into treated areas during the restricted entry interval (REI) of 48 hours.
PPE required for early entry to treated areas that is permitted under the Worker Protection Standard a nd that
involves contact with anything that has been treated, such as plants, soil, or water, is:
 Coveralls worn over short-sleeved shirt and short pants.
 Chemical resistant gloves made of barrier laminate , butyl rubber ≥ 14 mils, neoprene rubber ≥ 14 mils,
polyvinyl chloride (PVC) ≥ 14 mils, or Viton ≥ 14 mils .
 Chemical resistant footwear plus socks
 Chemical-resistant headgear for overhead exposure
 Protective eyewear
NON-AGRICULTURAL USE REQUIREMENTS
The requirements in this box apply to uses of this product that are NOT within the scope of the Worker
Protection Standard for agricultural pesticides (40 CFR Part 170). The WPS applies when this product is
used to produce agricultural plants on farms, fores ts, nurseries, or greenhouses.
Do not apply this product in a way that will contac t workers or other persons, either directly or thro ugh drift.
Only protected handlers may be in the area during application.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 4
USE REQUIREMENTS FOR PASTURES, PERENNIAL GRASSLANDS , RANGELAND, FALLOW LAND
AND NONCROP AREAS: Do not enter treated areas unti l spray has dried. For early entry to treated areas,
wear eye protection, chemical-resistant gloves, long-sleeved shirt, long pants, shoes and socks.
TURF USE REQUIREMENTS: Keep unprotected persons ou t of treated areas until sprays have dried.
NOTE: For application to turf being grown for sale or other commercial use as sod, or for commercial seed
production, or for research purposes, follow AGRICU LTURAL USE REQUIREMENTS on this label.
RESISTANCE MANAGEMENT
For resistance management, HM-1604 HERBICIDE is a Group 4 mode of action herbicide containing 2, 4-D
acid and dicamba acid. Any weed population may cont ain or develop plants naturally resistant to HM-1604
HERBICIDE and other Group 4 mode of action herbicides. The re sistant biotypes may dominate the weed
population if these herbicides are used repeatedly in the same field. Appropriate resistance managemen t
strategies should be followed.
To delay herbicide resistance, take one or more of the following steps:
 Rotate the use of
HM-1604 HERBICIDE or other Group 4 herbicides within a growing seaso n
sequence or among growing seasons with different he rbicide groups that control the same weeds in
a field.
 Use tank-mixtures with herbicides from a different group if such use is permitted; where information
on resistance in target weed species is available, use the less resistance-prone partner at a rate tha t
will control the target weed(s) equally as well as the more resistance-prone partner. Consult your
local extension service or certified crop advisor i f you are unsure as to which active ingredient is
currently less prone to resistance.
 Adopt an integrated weed-management program for he rbicide use that includes scouting and uses
historical information related to herbicide use and crop rotation, and that considers tillage (or othe r
mechanical control methods), cultural (e.g., higher crop seeding rates; precision fertilizer applicati on
method and timing to favor the crop and not the wee ds), biological (weed-competitive crops or
varieties) and other management practices.
 Scout before and after herbicide application to mo nitor weed populations for early signs of resistanc e
development. Indicators of possible herbicide resis tance include: (1) failure to control a weed species
normally controlled by the herbicide at the dose ap plied, especially if control is achieved on adjacen t
weeds; (2) a spreading patch of non-controlled plan ts of a particular weed species; (3) surviving
plants mixed with controlled individuals of the sam e species. If resistance is suspected, prevent
weed seed production in the affected area by an alt ernative herbicide from a different group or by a
mechanical method such as hoeing or tillage. Preven t movement of resistant weed seeds to other
fields by cleaning harvesting and tillage equipment when moving between fields, and planting clean
seed.
 If a weed pest population continues to progress af ter treatment with this product, discontinue use of
this product, and switch to another management stra tegy or herbicide with a different mode of action,
if available.
 Contact your local extension specialist or certifi ed crop advisors for additional pesticide resistanc e-
management and/or integrated weed-management recomm endations for specific crops and weed
biotypes.
 For further information or to report suspected resistance, contact Helena Agri-Enterprises, LLC
representatives at (901) 761-0050.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 5
Fields should be scouted prior to application to identify the weed species present and their growth st age to
determine if the intended application will be effective.
Fields should be scouted after application to verif y that the treatment was effective.
Suspected herbicide-resistant weeds may be identified by these indicators:
 Failure to control a weed species normally control led by the herbicide at the dose applied, especiall y
if control is achieved on adjacent weeds;
 A spreading patch of non-controlled plants of a pa rticular weed species; and
 Surviving plants mixed with controlled individuals of the same species.
Report any incidence of non-performance of this product against a particular weed species to your Hele na
Agri-Enterprises retailer, representative or call 901-761-0050. If resistance is suspected, treat weed escapes
with an herbicide having a different mechanism of a ction and/or use non-chemical means to remove
escapes, as practical, with the goal of preventing further seed production.
Plant into weed-free fields and keep fields as weed-free as possible.
To the extent possible, use a diversified approach toward weed management. Whenever possible
incorporate multiple weed-control practices such as mechanical cultivation, biological management prac tices,
and crop rotation.
Fields with difficult to control weeds should be rotated to crops that allow the use of herbicides with
alternative mechanisms of action or different management practices.
To the extent possible do not allow weed escapes to produce seeds, roots or tubers. Manage weed seeds at
harvest and post-harvest to prevent a buildup of the weed seed-bank.
Prevent field-to-field and within-field movement of weed seed or vegetative propagules. Thoroughly cle an
plant residues from equipment before leaving fields.
Prevent an influx of weeds into the field by managing field borders.
Identify weeds present in the field through scouting and field history and understand their biology. T he weed-
control program should consider all of the weeds pr esent.
Difficult to control weeds may require sequential applications of herbicides with differing mechanisms of
action.
Apply this herbicide at the correct timing and rate needed to control the most difficult weed in the f ield.
Use a broad spectrum soil-applied herbicide with a mechanism of action that differs from this product as a
foundation in a weed-control program. Do not use mo re than two applications of this or any other herbicide
with the same mechanism of action within a single growing season unless mixed with an herbicide with
another mechanism of action with an overlapping spectrum for the difficult-to-control weeds.
If resistance is suspected, treat weed escapes with an herbicide with a different MOA or use non-chemi cal
methods to remove escapes.
Contact your local sales representative, crop advisor, or extension agent to find out if suspected resistant
weeds to these MOAs have been found in your region. Do not assume that each listed weed is being
controlled by multiple mechanisms of action. Co-formulated active ingredients are intended to broaden the
spectrum of weeds that are controlled. Some weeds m ay be controlled by only one of the active ingredient in
this product.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 6
PRODUCT INFORMATION
HM-1604 HERBICIDE is a postemergence herbicide for controlling a wid e spectrum of annual, biennial, and
perennial broadleaf weeds and brush in pastures, ra ngeland, and grass (hay, silage); sorghum; wheat;
conservation reserve program land; postharvest, fal low, crop stubble, set-aside acres; general farmste ad
areas; certain noncrop areas; and for forest management.
Mode of Action
HM-1604 HERBICIDE contains two active ingredients uniquely formulate d to be used alone or tank mixed
with other listed products as well as liquid fertil izer solutions. HM-1604 HERBICIDE is readily absorbed by
plants through shoot and root uptake, translocates throughout the plants system, and accumulates in a reas
of active growth. HM-1604 HERBICIDE interferes with the plants growth hormones (auxin s) resulting in
death of many broadleaf weeds.
For best results, thoroughly clean sprayer equipmen t (tank, lines and nozzles) immediately after use b y
flushing system with water and heavy duty detergent or other suitable tank cleaner.
APPLICATION INSTRUCTIONS
Apply HM-1604 HERBICIDE at the rates and growth stages listed in Tables 1 and 2 as follows unless
instructed differently by section on “ Food/Feed Crop Specific Information ” or “ Non-Food/Feed Use (Land
not Harvested, Grazed or Foraged)-Specific Informat ion .” Use either water or sprayable liquid fertilizer
as a carrier for HM-1604 HERBICIDE. Use sprayable liquid fertilizer as the carrier in preplant or pre-
emergence use for all crops listed on this label. Postemergence uses with sprayable fluid fertilizer may be
made on pasture, hayland, or wheat crops only. Th e most effective application rate and timing varies based
on the target weed species (refer to Table I). In mixed populations of weeds the correct rate is dete rmined
by the weed species requiring the highest rate. De laying application permits weeds to exceed the maxi mum
size and will prevent adequate control.
For certain specified applications liquid fertilize r or oil may replace
part or all of the water as diluent. If dry flowabl e (DF), wettable powder (WP) or flowable (F) tank m ix
products are to be used, these should generally be added to the spray tank first.
It is the pesticide users responsibility to ensure that all products are registered for the intended use. Read
and follow the applicable restrictions, limitations , and directions for use on all product labels invo lved in the
tank mixture. Users must follow the most restrictiv e directions for use and precautionary statements o f each
product in the tank mixture.
Apply product only when active weed growth is evident.
CHEMIGATION PROHIBITION
Do not apply this product through any type of irrigation system.
Spray Coverage:
Weeds must be thoroughly covered with spray. Dense leaf canopies shelter smaller weeds and prevent
adequate spray coverage.
Sensitive Crop Precautions:
HM-1604 HERBICIDE may cause injury to desirable trees and plants, pa rticularly beans, cotton, flowers, fruit
trees, grapes, ornamentals, peas, potatoes, soybean s, sunflowers, tobacco, tomatoes and other broadlea f
plants when contacting their roots, stems or foliag e. At high temperatures (about 85 degrees or higher ),
vapors from this product may cause injury to the af orementioned susceptible crops. These plants are m ost
sensitive to HM-1604 HERBICIDE during their development or growing stage. Do not treat areas where
either possible downward movement into the soil or surface washing may cause contact of HM-1604
HERBICIDE with the roots of desirable trees and shrubs.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 7
Drift Reduction Information:
The following information may be helpful in reducin g possible spray drift from ground or aerial applic ations.
Avoid making applications when spray particle may b e carried by air currents to areas where sensitive crops
and plants are growing. Do not spray near sensitiv e plants if the wind is gusty or in excess of 5 mph and
moving in the direction of nearby sensitive crops o r if a temperature inversion exists. Always determ ine the
direction and distance of possible spray drift prio r to application. Leave an adequate buffer zone bet ween
area to be treated and sensitive plants. Coarse sp rays are less likely to drift out of the target are a than fine
sprays. Properly maintain and calibrate all spray e quipment. The use of agriculturally accepted drift
retardants are acceptable and advised. Avoid applic ations within the vicinity of susceptible plants wh en at all
possible. Do not apply in greenhouses.
AERIAL APPLICATION METHODS AND EQUIPMENT
Water Volume: Use 3-10 gallons of water per acre. Use the highe r spray volume when treating dense or tall
vegetation.
Application Equipment: Select nozzles designed to produce minimal amounts of fine spray particles. Make
applications at the lowest stage height to reduce t he exposure of spray droplets to evaporation and wi nd.
The applicator must follow the most restrictive use precautions to avoid drift hazards, including thos e found
in the this labeling as well as applicable state and local regulations and ordinances.
SPRAY DRIFT MANAGEMENT
A variety of factors including weather conditions (e.g. wind direction, wind speed, temperature, relative
humidity) and method of application (e.g., ground, aerial, and airblast) can influence pesticide drift. The
applicator must evaluate all factors and make appropriate adjustments when applying this product.
Droplet Size
When applying sprays that contain 2,4-D as the sole active ingredient, or when applying sprays that c ontain
2,4-D mixed with active ingredients that require a Coarse or coarser spray, apply only as a Coarse o r
coarser spray (ASABE standard 572) or a volume mean diameter of 385 microns or greater for spinning
atomizer nozzles.
When applying sprays that contain 2,4-D mixed with other active ingredients that require a Medium or more
fine spray, apply only as a Medium or coarser spra y (ASABE standard 572) or a volume mean diameter of
300 microns or greater for spinning atomizer nozzles.
Wind Speed
Do not apply at wind speeds greater than 15 mph. Only apply this product if the wind direction favors on-
target deposition and are not sensitive areas (including, but not limited to, residential areas, bodies of water,
known habitat for nontarget species, nontarget crops) within 250 feet downwind. If applying a Medium spray,
leave one swath unsprayed at the downwind edge of t he treated field.
Temperature Inversions
If applying at wind speeds less than 3 mph, the app licator must determine if: a) conditions of temperature
inversion exist, or b) stable atmospheric conditions exist at or below nozzle height. Do not make app lications
into areas of temperature inversions or stable atmo spheric conditions.
2,4-D esters may volatize during conditions of low humidity and high temperatures. Do not apply during
conditions of low humidity and high temperatures
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 8
Susceptible Plants
Do not apply under circumstances where spray drift may occur to food, forage, or other plantings that might
be damaged or crops thereof rendered unfit for sale , use or consumption. Susceptible crops include, but are
not limited to cotton, okra, flowers, grapes (in growing stage), fruit trees (foliage), soybeans (vegetative
stage), ornamentals, sunflowers, tomatoes, beans, and other vegetables, or tobacco. Small amounts of
spray drift that might not be visible may injure susceptible broadleaf plants.
Other State and Local Requirements
Applicators must follow all state and local pesticide drift requirements regarding application of 2,4- D
herbicides. Where states have more stringent regulations, they must be observed.
Equipment
All aerial equipment and ground application equipme nt must be properly maintained and calibrated using
appropriate carriers or surrogates.
For aerial equipment, the boom length must not exce ed 75% of the wingspan or 90% of the rotor blade
diameter.
Release spray at the lowest height consistent with efficacy and flight safety. Do not release spray at a height
greater than 10 feet above the crop canopy unless a greater height is required for aircraft safety. This
requirement does not apply to forestry or rights-of-way applications.
When applications are made in a crosswind, the swat h will be displaced downwind. The applicator must
compensate for this by adjusting the path of the aircraft upwind.
For ground boom application, do not apply with a nozzle height greater than 4 feet above the crop canopy.
SENSITIVE AREAS
The pesticide should only be applied when the poten tial for drift to adjacent sensitive areas (e.g. re sidential
areas, bodies of water, known habitat for threatene d or endangered species, non-target crops) is minim al
(e.g. when wind is blowing away from the sensitive areas).
Table 1. Application Rate and Timing Annual Weeds
For use in non-food/feed crops only: the addition of liquid fertilizer (28-0-0, 32-0-0) solutions at ½ the GPA
spray solution has shown to give increased efficacy.
Weeds Controlle d
(including ALS and
triazine-resistant)
Rate Per Acre (according to weed growth stage)
1/3 pints 2/3 pints 1 pints 1 1/8 pints 1 2/3 pints 2 pints
Amaranth, Palmer actively growing
, Powell actively growing
, Spiny actively growing
Beebalm, Spotted - - - pre-bloom post-bloom -
Black Medic
Broomweed 1-3" 3" branching - branching - after branching
Buckwheat, Wild - 1-6" - - - -
Buffalobur - - - 1-6" - Flowering
Burdock - pre-flower - - - -
Buttercup - pre-flower - early bloom late bloom -
Carpetweed actively growing
Chickweed, Common - Seedling 1-3" - - -
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 9
Weeds Controlle d
(including ALS and
triazine-resistant)
Rate Per Acre (according to weed growth stage)
1/3 pints 2/3 pints 1 pints 1 1/8 pints 1 2/3 pints 2 pints
Cockle, Cow - < 3" - - - -
Cocklebur, Common - 1-6" 6-12" 12-18" - -
Coreopsis, Plains 1-4" 1-6" - - - -
Croton, Woolly - 4-12" 12-30" - - -
Dogfennel - - - 10-15" - -
Evening Primrose - < 2" - 2-6" - -
Flax - < 2" - - - -
Fleabane, Annual - 1-4" 4-8" 8" -
Flixweed - < 3" - - -
Henbit - - preflower - flower -
Knotweed Spp. - < 3" runners - > 3" runners - actively growing
Kochia - 1-6" 6-10" 10-20" - actively growing
Lambsquarters, Common - 1-6" 6-10" 10-20" - activel y growing
Mallow, Common - < 3" - - - -
Marestail (Horseweed) actively growing
Morning glory, Ivyleaf - pre-flower - - - -
, Tall - pre-flower - post-flowe r - -
Mustards, Annual Rosette early bolt - -
, Tansy - < 3" -
Pennycress, Field - - - rosette - -
Pepperweed, Virginia - - 1-3" 3-6" after branching -
Pigweed, Prostrate - < 3" - - - -
, Redroot - < 3" 3-10" - - -
, Smooth - < 3" - - - -
, Tumble - < 3" - mature - -
Pineapple Weed actively growing
Poorjoe - prior to
flower
- - - actively growing
Puncturevine actively growing
Purslane, Common < 3" 3-8" - -
Ragweed, Common >10" -
Western, Lanceleaf 1-3" 3-6" 6-10" actively growing - -
Rocket, London actively growing
, Yellow actively growing
Sedge 1 - - - - - -
Shepherdspurse - Rosette - - - -
Smartweed, Pennsylvania - < 4" - - 4-12" -
Sneezeweed, Bitter - 1-4" prior to flower flower - -
Sowthistle - Rosette - bolting - -
Sunflower - 1-3" 3-6" 6-24" - -
Thistle, Russian - - - rosette - -
Velvetleaf - < 6" 6-20" > 20" - -
1 For use in non-food/feed crop only. Adding crop oil concentrate has shown to improve performance on actively growing
annual sedge.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 10
Table 2. Application Rate and Timing Biennial and Perennial Weeds.
The addition of liquid fertilizer (28-0-0, 32-0-0) at ½ the GPA of the spray solution has proven to gi ve
increase suppression or control on certain species of weeds.
Weeds Controlled
Rate Per Acre (according to weed growth stage)
1/3 pints 2/3 pints 1 pints 1 1/8 pints 1 2/3 pin ts 2 3 1/4 pints
Bindweed, Field - - - - - actively growing
Bittercress - 2-3" - - - -
Black Locust actively growing
Buckeye species - - - - full leaf -
Bullnettle 1 - - - flower - -
Carrot, Wild actively growing
Chickweed, Field actively growing
, Mouseear actively growing
Chicory - - - - early bolting -
Clover, Bur - - Pre-flower - - -
Clover actively growing
Dandelion, Common - rosette - bolting - -
Dewberry, Southern - - - - - spring or fall
Dock, Curly - - prior to bolting - after bolting -
Elderberry 1 - - - - - actively growing
Goldenrod, Missouri - - - 3-15" flower -
Groundsel, Texas - rosette post-bolting - - -
Honeysuckle, Hairy - - - - spring or fall -
Horsenettle, Carolina - - - - - flower or berry
Ironweed actively growing
Ivy, Poison - - - after bloom - -
Knapweed, Black 1 - - - - - actively growing
, Russian 1 - - - - - actively growing
, Spotted - - - - - actively growin g
Kudzu actively growing
Marshelder - - - <12" 12"/prebloom
Mesquite 2 - - - - - 45-90 days
after budbreak
Milkweed, Antelopehorn 1 - - - pre-flower - Flower
Nettle, Stinging actively growing
Nightshade, Silverleaf - - - full flower - -
,Black - - - full flower - actively growing
Persimmon, Eastern 2 - - - - - actively growing
Plantain, Broadleaf actively growing
, Buckhorn actively growing
Poison Oak actively growing
Prickly, Lettuce - - - rosette - actively growing
Rabbitbrush 1 - - - - - -
Ragwort, Tansy - - - rosette - actively growing
Redvine 1 - - - - - actively growing
Russian Olive actively growing
Sagebrush, Fringed 1 - - - - - actively growing
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 11
Weeds Controlled
Rate Per Acre (according to weed growth stage)
1/3 pints 2/3 pints 1 pints 1 1/8 pints 1 2/3 pin ts 2 3 1/4 pints
Smartweed - - - - - -
Sorrel, Red - - Rosette bolting flower actively gro wing
Sowthistle 1 - - - - - actively growing
Spurge, Leafy 1 - - - - - full leaf
Tallow Tree, Chinese 3 - - - - - -
Teasel actively growing
Thistle, Bull - - Rosette bolting - actively growin g
, Canada 1 - - - - - -
, Musk - - - rosette/bolting - -
, Plumeless - - Rosette bolting - -
Toadflax, Dalmatian actively growing
Vetch, Hairy - 1-4" 4-8" 8" full flower - -
Willow actively growing
Yankeeweed - - - 10-18" - Rosette
Yarrow, Common actively growing
Yellow Starthistle - - - - - -
Yucca actively growing
1 Specified rate will provide top growth suppression only.
2 For improved root kill or woody species such as mesquite and eastern persimmon spray 2 pints of per acre HM-1604
HERBICIDE each year for 3 consecutive years.
3 Under dense populations, a second application may be needed the following growing season.
For increased control of weeds such as blackberry and dewberry, HM-1604 HERBICIDE may be tank mixed with metsulfuron-
methyl, if labeled for the use site.
Ground Application (Banding)
Do not apply with a nozzle height greater than 4 feet above the crop canopy.
When applying HM-1604 HERBICIDE by banding, determine the amount of herbicide and water volume
needed using the following formula:
Bandwidth in inches x Broadcast rate = Banding herbicide
Row width in inches per acre rate per acre
Bandwidth in inches x Broadcast rate = Banding water
Row width in inches volume per acre volume per acre
Ground Application (Broadcast)
Water volume : Use 10-25 gallons of spray solution per broadcast acre for optimal performance. Use the
higher spray volume when treating dense or tall vegetation.
Application Equipment : Select nozzle design to produce minimal amounts o f fine spray particles. Spray
nozzles as close to the weeds as is practical for good weed coverage.
Spot or Small Area Application
HM-1604 HERBICIDE may be applied to individual clumps or small areas of undesirable vegetation using
handgun or similar types of application equipment. Apply diluted sprays to allow complete wetting (up to
runoff) of foliage and stems. For knapsack or othe r small capacity sprayers, prepare a solution of HM-1604
HERBICIDE in water according to Table 3 (assuming that the s pot treatment rate equates to 40 gallons pre
acre on the broadcast basis.) Adding a surfactant (0.5% by volume) can help improve control.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 12
Do not make spot treatments in addition to broadcast or band treatments.
Application equipment: Select nozzles designed to p roduce minimal amounts of fine spray particles. Sp ray
with nozzles as close to the weeds as is practical for good weed coverage.
Table 3. Knapsack Sprayer Dilution Instructions
Sprayer Capacity
(gallons of water)
Amount of HM -1604 HERBICIDE
to add to the spray tank
1 gallon 2/3 fluid ounce*
3 gallons 2 fluid ounces
5 gallons 3 fluid ounces
* 1 fluid ounce = 2 tablespoons
ADDITIVES
To improve burndown of emerged weeds, surfactants a nd/or low use rates of liquid fertilizers (28-0-0; 32-0-
0), or crop oil concentrate may be used with HM-1604 HERBICIDE or HM-1604 HERBICIDE tank mixes
applied after the weeds have emerged. Crop oil con centrate is for non-food/feed crop uses only. Do n ot
apply tank mixes that include Ammonium Sulfate or C rop Oil Concentrate to any food/feed crop use liste d on
this label. For food/feed crop use, do not use liq uid fertilizers that contain Ammonium Sulfate (AMS) as a
source of nitrogen as tolerances in commodities der ived from the crop may contain residues that exceed
established tolerances.
Oil Concentrate
A crop oil concentrate must contain either a petrol eum or vegetable oil base and must meet all of the
following criteria:
 be non-phytotoxic
 provide good mixing quality in the jar test, and
 be successful in local experience
The exact composition of suitable products will var y; however, vegetable oil and petroleum oil concent rates
should contain emulsifiers to provide good mixing q uality. Highly refined vegetable oils have proven more
satisfactory than unrefined vegetable oils. For ad ditional information, see Compatibility Test for Mi x
Components.
Adjuvants containing crop oil concentrates may be u sed for preplant, pre-emergence and between croppin g
applications. Do not use crop oil concentrate for p ostemergence applications to food/feed crops (i.e.
sorghum, grass (hay or silage), pastures, rangeland, and wheat.
Nitrogen Source
Sprayable liquid fertilizers: Use ½ GPA of sprayabl e liquid fertilizers (28-0-0; 32-0-0) per acre. Do not use
brass or aluminum nozzles when spraying fertilizers.
Non-ionic Surfactant
The standard label rates are 2-4 pints of an 80% ac tive non-ionic spray surfactant per 100 gallons of water.
(Rate will vary with the size and condition of weed s to be controlled. Use lowest rate per 100 gallon s when
weeds are small and actively growing. As weeds inc rease in size and or become hardened off, the rate of
non-ionic surfactant will have to be increased to give optimum coverage and control.)
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 13
Table 4. Additive Rate Per Acre.
Additive 1 Rate Add itive Per Acre
Non-ionic Surfactant 2-4 pints per 100 gallons 2
Sprayable Liquid Fertilizers (28-0-0; 32-0-0) ½ GPA of spray solution
Crop Oil Concentrate 1 quart
1 See manufacturers label for specific rates.
2 Use lowest rate per 100 gallons when weeds are sma ll and actively growing. As weeds increase in size
and or become hardened off, the rate of non-ionic s urfactant will have to be increased to give optimum
coverage and control.
TANK MIXING INFORMATION
Tank Mix Partners/Components
It is the pesticide users responsibility to ensure that all products are registered for the intended use. Read
and follow the applicable restrictions and limitations and directions for use on all product labels involved in
tank mixing. Users must follow the most restrictive directions for use and precautionary statements of each
product in the tank mixture.
The following products may be tank mixed with HM-1604 HERBICIDE according to the specific tank mixing
instructions in this label and respective product labels.
2,4-D
1 diflufenzopyr picloram
alachlor diuron pronamide
ametryn fenoxaprop-p-ethyl prosulfuron
asulam glyphosate quinclorac
atrazine halosulfuron-methyl terbacil
bentazon metribuzin thifensulfuron-methyl
carfentrazone-ethyl metsulfuron-methyl triasulfuron
clopyralid MCPA tribenuron-methyl
chlorsulfuron paraquat
*When tank mixing with products that contain either 2,4-D or dicamba, do not exceed the annual per acr e
application rate for each active ingredient for that crop.
See “ Food/Feed Crop Specific Information ” section for more information for more details. R ead and follow
the applicable Restrictions and Limitations and Dir ections for Use on all products involved in tank mi xing.
Physical incompatibility, reduced weed control, or crop injury may result from mixing HM-1604 HERBICIDE
with other pesticides (fungicides, herbicides, inse cticides, or miticides), additives, or fertilizers. Therefore
always determine compatibility before tan mixing this product with any other pesticide.
Compatibility Test for Mix Components
Before mixing components, always perform a compatib ility jar test.
For 20 gallons per acre spray volume, use 3.3 cups (800 ml) of water. For other spray volumes adjust
accordingly. Only use water from the intended source at the source temperature.
Add components in the sequence indicated in the Mix ing Order using 2 teaspoons for each pound or 1
teaspoon for each pint of specified label rate per acre.
Always cap the jar and invert 10 cycles between com ponent additions.
When the components have all been added to the jar, let the solution stand for 15 minutes. Evaluate t he
solution for uniformity and stability. The spray s olution should not have free oil on the surface, no r fine
particles that precipitate to the bottom, nor thick (clabbered) texture. If the spray solution is not compatible,
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 14
repeat the compatibility test with the addition of a suitable compatibility agent. If the solution is still
incompatible, do not mix the ingredients in the same tank.
Mixing Order: If an inductor is used, rinse it thoroughly after each component has been added. Maintain
constant agitation during application.
1. Water. Begin by agitating a thoroughly clean spr ayer tank half full of clean water.
2. Agitation. Maintain constant agitation througho ut mixing and application.
3. Products in PVA bags. Place any product contain ed in water-soluble bags into the mixing tank. Wai t
until all water-soluble PVA bags have fully dissolv ed and the product is evenly mixed in the spray tan k
before continuing.
4. Water-dispersible products (such as dry flowable s, wettable powders, suspension concentrates, and
suspo-emulsions)
5. Water-soluble products (such as HM-1604 HERBICIDE ).
6. Emulsifiable concentrates (such as oil concentra te, when applicable).
7. Water-soluble additives (such as liquid fertiliz ers (28-0-0; 32-0-0), when applicable).*
8. Remaining quantity of water.
* If sprayable fluid fertilizer is used as the carrier.
Always perform the Compatibility Test before mixing into the spray tank. Also, when using a sprayable fluid
fertilizer as the carrier, any product contained in PVA bags must first be completely dissolved in wat er before
the contents can be added to the fertilizer mix.
PRECAUTIONS
 Arid (dry) conditions: it is extremely important t hat the addition of a suitable Nonionic Surfactant, Oil, or
sprayable fertilizer be used when applying HM-1604 HERBICIDE . Higher rates of HM-1604 HERBICIDE
may be needed to control susceptible weeds in this environment.
 Rainfast Period: Rainfall or irrigation occurring within 4 hours after postemergence applications ma y
reduce effectiveness of HM-1604 HERBICIDE .
 Stress: Do not apply to crops under stress such a s stress due to lack of moisture, hail damage, floo ding,
herbicide injury, mechanical injury, or widely fluc tuating temperatures, as unsatisfactory control may
result.
RESTRICTIONS
 Maximum seasonal use rate: Refer to Table 5.
 Do not make more than two applications per season regardless of individual application rates
 Preharvest Interval (PHI): Refer to “ Food/Feed Crop Specific Information ”
 Restricted Entry Interval (REI): 48 Hours
 Do not apply to crops that show injury (leaf phyto toxicity or plant stunting) produced by any other p rior
herbicide applications, because this injury may be enhanced or prolonged.
 Do not apply this product though any type of irrig ation equipment. Do not contaminate irrigation dit ches
or water used for domestic purposes.
 Crop Rotational Restrictions:
The interval between application and planting rotat ional crop is given below. Always exclude counting
days when the ground is frozen. Moisture is essential for the degradation of this herbicide in soil.
Planting/replanting restrictions for HM-1604 HERBICIDE applications of 3 2/3 pints per acre or less: No
rotational cropping restrictions apply at 120 days or more following application. Additionally, for a nnual
crop uses in this label including sorghum, follow t he preplant use directions under “VI. Food/Feed Cro p
Specific Information.” For barley, oat, wheat, and other grass seedlings, the interval between applic ation
and planting is 10 days per 2/3 pint per acre.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 15
Planting/replanting restrictions for applications o f more than 3 2/3 pints and up to 4 3/4 pints of HM-1604
HERBICIDE per acre: Corn, sorghum, and all other crops grow n in areas with 30” or more of annual rain
have no rotational cropping restrictions 120 days o r more after application. Barley, oat, wheat and o ther
grass seedlings have no cropping restrictions, if t he interval from application to planting is 10 days per
2/3 pint per acre east of the Mississippi River and 15 days per 2/3 pint per acre west of the Mississi ppi
River. For all other crops in areas with less than 30” of annual rainfall, the interval between appli cation
and planting is 180 days or more.
Do not plant cotton for at least 30 days after application and after allowing for a minimum accumulation
of 1" rainfall or overhead irrigation.
Table 5. Crop Specific Restrictions and Limitations.
Crop Maximum Rate
Per Acre
Per Application
Maximum Rate
Per Acre
Per Season
Livestock Grazing
or Feeding 1
Aircraft
Application
Between Crop
Applications 2
3 2/3 pints 4 3/4 pints Yes Yes
Pasture, Hay, Silage 3 ¼ pints 6 ½ pints Yes Yes
Sorghum 2/3 pints 2/3 pints Yes Yes
Wheat 2 pints 4 pints Yes Yes
1 Refer to “ Food/F eed Crop Specific Information ” for grazing and feeding restrictions.
2 Postharvest, Fallow, Crop Stubble and Set-Aside for broadleaf weed control. Refer to “Restrictions ” for
possible crop rotational restrictions.
FOOD/FEED CROP SPECIFIC INFORMATION
PASTURES, RANGELAND AND GRASS (HAY, SILAGE)
HM-1604 HERBICIDE is for use on pasture (including pasture grown for hay), rangeland, and grass grown
for hay or silage, between crop applications/fallow systems, Conservation Reserve Programs, and genera l
farmstead (non-cropland only).
Refer to Tables 1 and 2 for rate selection based on targeted weed or brush species. Some weed species will
require tank mixes for adequate control.
For pasture renovations, wait 3 weeks per 1 1/4 pin ts of HM-1604 HERBICIDE used per acre before
interseeding or injury may occur.
Uses described in this section also pertain to smal l grains (such as barley, corn, forage sorghum, oat s, rye,
sudangrass, or wheat) grown for pasture, hay, and s ilage only. Newly seeded areas including small gra ins
grown for pasture or hay, may be injured if rates o f HM-1604 HERBICIDE are greater than 1 1/4 pints per
acre are applied in one application.
In newly established hybrid Bermudagrass, Pangolagr ass, and stargrasses ( Cynodon spp.) use 1 to 2 pints
of HM-1604 HERBICIDE per acre to control or suppress weeds after planti ng vegetative propagules
(stolons) of hybrid bermudagrasses. In addition to the weeds listed in Tables 1 and 2, this rate of HM-1604
HERBICIDE will control or suppress annual sedges, broadleaf signalgrass, crabgrass, and goosegrass.
Best results will be obtained if HM-1604 HERBICIDE is applied at the germinating stage of weeds. Und er
favorable conditions, this is usually 7-10 days aft er planting these grasses. Reduced control can be
expected if weeds are allowed to reach 1” in height before application or if germination of weeds occu rs 10
days after application.
Use on bentgrass, susceptible grass pastures (such as carpetgrass, buffalograss, or St. Augustine gras s),
lespedeza, wild winter peas, vetch, clover, and alfalfa pastures may result in some degree of plant injury.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 16
When perennial weeds are reaching maturity, mowing and allowing some regrowth will enhance control.
Pasture and Rangeland Tank Mixes
It is the pesticide users responsibility to ensure that all products in the listed mixtures are regis tered for the
intended use. Users must follow the most restricti ve directions and precautionary language of the pro ducts
in the mixture.
HM-1604 HERBICIDE may be applied in tank mixes with one or more of t he following herbicides:
2,4-D* Dicamba Dicamba DMA*
Metsulfuron-methyl Triasulfuron
*When tank mixing with products that contain either 2,4-D or dicamba, do not exceed the annual per acr e
application rate for each active ingredient for that crop.
PASTURE & RANGELAND RESTRICTIONS:
 Do not make more than 2 applications per year.
 Do not exceed a total of 6 1/2 pints (0.81 lb a.e dicamba and 1.87 lb a.e. 2,4-D) of HM-1604 HERBICIDE
per treated acre during a growing season.
 Minimum spray interval between applications is 30 days.
 Rates above 2 1/2 pints of HM-1604 HERBICIDE per acre are for spot treatments only.
 If grasses are grown for seed or for seed-down pur poses, do not apply after grass reaches joint stage.
 Pre-Harvest Interval (PHI): 7 days
 Grazing and Feeding Non-Lactating Animals : Do not graze non-lactating animals within 7 days of
treatment. Do not permit meat animals being finish ed for slaughter to graze treated fields within 30 days
of slaughter.
 Grazing and Feeding Lactating Animals : Do not graze lactating dairy animals within 7 da ys of
treatment.
 Dry hay and Silage : Treated grasses may be harvested for dry hay or silage but do not harvest within
37 days of treatment.
 If grass is to be cut for hay, Agricultural Use requirements for the Worker Protection Standard ar e
applicable.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 4.0 pounds of a.e. per acre per year.
SORGHUM
Rates and Timings
Apply 2/3 pint of HM-1604 HERBICIDE per acre to sorghum in the 3-5 leaf stage (4”-8” t all.) For best
performance apply when weeds are small (less than 3 ” tall).
Applications of HM-1604 HERBICIDE to sorghum during periods of rapid growth may resu lt in temporary
leaning of plants or rolling leaves. These effects are usually outgrown within 10-14 days. Sorghum g rowing
under conditions of stress such as high moisture, l ow fertility, and abnormal temperature may be more
sensitive to applications of HM-1604 HERBICIDE . Do not use surfactants or oils with postemergenc e
applications of HM-1604 HERBICIDE on sorghum crops. Do not use HM-1604 HERBICIDE if the potential
for sorghum injury is not acceptable.
If sorghum is grown for pasture, hay or silage, ref er to “ Pastures, Rangeland and Grass (Hay, Silage) ”
under “ Food/Feed Crop Specific Information ” for livestock grazing and feeding restrictions.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 17
Sorghum Tank Mixes:
It is the pesticide users responsibility to ensure that all products in the listed mixtures are regis tered for the
intended use. Users must follow the most restricti ve directions and precautionary language of the pro ducts
in the mixture.
HM-1604 HERBICIDE ™ may be applied in tank mixes with one or more of the following herbicides:
Atrazine Bentazon Bromoxynil
Halosulfuron-methyl Prosulfuron Quinclorac
SORGHUM RESTRICTIONS:
 Do not graze or feed treated sorghum forage or sil age prior to mature grain stage.
 Make no more than one postemergence application pe r growing season.
 Do not permit meat or dairy animals to consume tre ated crop as fodder or forage for 30 days following
application.
 Do not apply HM-1604 HERBICIDE to sorghum grown for seed production.
 Pre-Harvest interval is 30 days.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D ester, do not exceed a combined total of 0.5 pounds a.e. per acre per year.
WHEAT
(Fall and Spring-seeded)
If small grains are grown for pasture or hay only, refer to Pastures, Rangeland and Grass (Hay, Silage ).
Early Season Application :
Apply up to 2 pints of HM-1604 HERBICIDE per acre to wheat unless using one of the wheat sp ecific
programs below.
Early season applications to spring-seeded wheat mu st be made after tillering and before wheat reaches the
6-leaf stage.
Early season applications to fall-seeded wheat must be made after tillering and prior to the jointing stage.
Take care in staging early developing wheat varieti es such as TAM 107, Madison, or Wakefield to be cer tain
that the application occurs prior to the jointing stage.
Specific Use Programs for Fall-Seeded Wheat Only :
Up to 3/4 pints of HM-1604 HERBICIDE per acre may be applied on fall-seeded wheat after the wheat
begins to tiller for suppression of perennial weeds , such as field bindweed. Make applications in the fall
following a frost but before a killing freeze. Per iods of extended stress such as cold and wet weathe r may
enhance the possibility of crop injury. For fall a pplications only, do not use if the potential for c rop injury is
not acceptable.
Preharvest Applications :
HM-1604 HERBICIDE can be used to control listed weeds that may inter fere with harvest of wheat. Apply
up to 1 1/4 pints of HM-1604 HERBICIDE per acre as a broadcast or spot treatment to annua l broadleaf
weeds when wheat is in the hard dough stage and the green color is gone from the nodes (joints) of the
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 18
stem. Best results will be obtained if application can be made when weeds are actively growing but be fore
weeds canopy. A waiting interval of 14 days is req uired before harvest. Do not use preharvest-treate d
wheat for seed unless a germination test is perform ed on the seed with an acceptable result of 95%
germination or better. For control of additional b roadleaf weeds or grasses, HM-1604 HERBICIDE may be
tank mixed with other herbicides such as metsulfuro n-methyl or glyphosate that are registered for preh arvest
use in wheat.
WHEAT RESTRICTIONS:
 Do not use HM-1604 HERBICIDE in wheat underseeded with legumes.
 Postemergence:
 Make no more than one application per crop cycle
 Do not apply more than 2 pints (0.25 lb a.e dicamb a and 0.58 lb a.e. 2,4-D) per acre per
application.
 Preharvest:
 Make no more than one application per crop cycle.
 Do not apply more than 1 ¼ pints (0.16 lb a.e dica mba and 0.36 lb a.e. 2,4-D) per acre per
application.
 Pre-Harvest interval is 14 days.
 Feeding and Grazing Restrictions for Wheat:
 Do not graze or feed animals within 7 days of trea tment.
 Do not graze or harvest for livestock feed prior t o crop maturity.
 Preharvest use of HM-1604 HERBICIDE is not registered for use in California.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application. Do not
exceed a combined total of 2.0 pounds of a. e. of dicamba per acre per year
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2, 4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 1. 25 pounds a.e. per acre crop cycle of 2,4-D for pos t
emergent use. Do not exceed 0.5 pounds of a.e. per acre per crop cycle of 2,4-D for pre-harvest applic ation.
Do not exceed a total of 1.75 pounds of a.e. per acre per crop cycle for all uses.
Wheat Tank Mixes:
It is the pesticide users responsibility to ensure that all products in the listed mixtures are regis tered for the
intended use. Users must follow the most restricti ve directions and precautionary language of the pro ducts
in the mixture.
Table 6 Wheat Tank Mix Partners
2,4-D
4 diuron 3 prosulfuron 1
bromoxynil fenoxaprop-p-ethyl 2 thifensulfuron-methyl 1
carfentrazone-ethyl metribuzin 3 tribenuron-methyl 1
chlorsulfuron 1 MCPA 2 triasulfuron 1
clopyralid metsulfuron-methyl 1
1 Do not use low rates of sulfonylurea herbicide, suc h as chlorsulfuron, metsulfuron-methyl, prosulfuron , thifensulfuron-
methyl, tribenuron-methyl and triasulfuron on more mature weeds or on dense vegetative growth.
2 Do not use as a tank mix treatment with 2,4-D, dic amba, fenoxaprop-p-ethyl or MCPA on Durum wheat. D o not tank
mix with 2,4-D, fenoxaprop-p-ethyl or MCPA if wild oat is the larger weed.
3 Tank mixes with diuron and metribuzin are for use in fall-seeded wheat only.
4 HM-1604 HERBICIDE contains 0.29 pounds acid equival ent of 2,4-D per pint. When tank mixing with 2,4-D do not
exceed a combined total of 0.5 pound acid equivalent per acre of 2,4-D.
Between Crop Applications/Fallow Systems, Conservat ion Reserve Programs, and General
Farmstead
These uses are considered Food/Feed Crops when harv ested, grazed or foraged. Consult section on “Tank
Mixing Information” for adjuvant restrictions and section on “Additives” for specific use directions.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 19
NON-FOOD/FEED USE (LAND NOT HARVESTED, GRAZED OR FO RAGED)-SPECIFIC INFORMATION.
BETWEEN CROP APPLICATIONS
Preplant Directions (Postharvest, Fallow, Crop Stub ble, Set-Aside) For Broadleaf Weed Control
HM-1604 HERBICIDE can be applied postharvest in the fall, spring, or summer during the fallow period or to
crop stubble/set-aside acres. Apply to weeds after crop harvest (postharvest) and before a killing fr ost or in
the fallow cropland or crop stubble the following spring or summer.
See “ Restrictions and Limitations ” for the specified interval between application an d planting to prevent
crop injury.
Rates and Timings:
Apply 1 3 2/3 pints of HM-1604 HERBICIDE per acre. Refer to Table 1 to determine use rates for specific
targeted weed species. Retreatments may be made as needed; however, do not exceed a total of 4 3/4
pints of HM-1604 HERBICIDE per treated acre during a growing season. For bes t performance, apply HM-
1604 HERBICIDE when annual weeds are less than 6" tall, when bien nial weeds are in the rosette stage and
to perennial weed regrowth in late summer or fall f ollowing a mowing or tillage treatment. The most e ffective
control of upright perennial broadleaf weeds such a s Canada thistle and Jerusalem artichoke occurs if HM-
1604 HERBICIDE is applied when the majority of weeds have at leas t 4-6" of regrowth or for weeds such as
field bindweed and hedge bindweed that are in or be yond the full bloom stage. The addition of liquid
fertilizers (28-0-0, 32-0-0) at ½ GPA has shown to increase efficacy.
Do not disturb treated areas following application. Treatments may not kill weeds that develop from s eed or
underground plant parts such as rhizomes or bulblet s, after the effective period for HM-1604 HERBICIDE .
For seedling control, a follow-up program or other cultural practices could be instituted.
Between Crop Tank Mixes:
It is the pesticide users responsibility to ensure that all products in the listed mixtures are regis tered for the
intended use. Users must follow the most restricti ve directions and precautionary language of the pro ducts
in the mixture.
In tank mixes with one or more of the following her bicides, apply 1.0 - 1.25 pints of HM-1604 HERBICID E per
acre for control of annual weeds, or 1.25 - 4.25 pi nts of HM-1604 HERBICIDE per acre for control of biennial
and perennial weeds
2,4-D* Dicamba* Paraquat
Atrazine Diflufenzopyr Picloram
Carfentrazone-ethyl Glyphosate Pronamide
Chlorsulfuron Metribuzin Quinclorac
Clopyralid Metsulfuron-methyl Triasulfuron
*When tank mixing with products that contain 2,4-D or dicamba, do not exceed the annual per acre
application rate for each active ingredient for that crop.
BETWEEN CROP APPLICATION RESTRICTIONS:
 Plant only labeled crops within 29 days following application.
 Limited to 2 applications per year.
 Minimum of 30 days between applications.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 20
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 2.0 pounds of a.e. per acre per year.
APPLICATIONS TO FALLOW GROUND PRIOR TO PLANTING COT TON
Rates and Timings
Apply HM-1604 HERBICIDE as a broadcast or spot treatment to emerged and ac tively growing weeds at the
rate of 1 to 3 2/3 pints per acre. The most effective control of weeds occurs if application is made when
weeds are in the 2-4 leaf stage and rosettes are less than 2" across
Cropping Restrictions
Do not plant cotton for at least 30 days after application and after allowing for a minimum accumulation of 1"
rainfall or overhead irrigation. Do not apply west of the Rockies or to geographic areas with average annual
rainfall less than 25".
Tank Mix Treatments:
It is the pesticide users responsibility to ensure that all products in the listed mixtures are regis tered for the
intended use. Users must follow the most restricti ve directions and precautionary language of the pro ducts
in the mixture.
For control of grasses or additional broadleaf weeds, HM-1604 HERBICIDE may be tank mixed with
prometryn, paraquat, and glyphosate herbicides.
FOREST MANAGEMENT
Forest Site Preparation
Budbreak Spray: For control of alder, susceptible broadleaf weeds, and susceptible woody plants before
planting forest seedlings, apply up to 2 quarts per acre in a minimum of 10 gallons spray mixture per acre.
Apply as an oil spray (see " Mixing Instructions ") after alder buds break, but before foliage is 1/ 4 full size. A
water spray including 2 to 4 quarts per acre of die sel oil, fuel oil, stove oil, or crop oil concentra te may also
be used.
Foliage Spray: To control alder and susceptible woody plants bef ore planting forest seedlings, apply up to 4
pints per acre in a minimum of 10 gallons spray mix ture per acre. If desired, apply as a water spray including
up to 1 quart of diesel oil, fuel oil, stove oil, o r crop oil concentrate per gallon of water (see "Mi xing
Instructions"). For best results, apply after alder foliage has reached full size.
Conifer Release: Some Conifers are more susceptible to HM-1604 HER BICIDE than others. To control
alder, susceptible broadleaf weeds, and susceptible woody plants in young conifer stands, apply up to 2
pints per acre in a minimum of 10 gallons spray mix ture per acre. Apply this spring foliage treatment as a
water spray when 3/4 of the brush foliage has full size leaves and before new conifer growth reaches 2
inches in length. Such stages usually occur betwee n early May and mid-June, but base application timi ng on
growth stages of brush and conifers. Application m ay cause leader deformation and other conifer injur y, but
trees should overcome it during the next growing season.
To control tanoak, madrone, ceanothus, canyon live oak, and manzanita, and to release Douglas fir,
hemlock, Sitka spruce or grand fir, apply up to 3 p ints per acre in a minimum of 10 gallons spray mixt ure per
acre. Apply this spring foliage treatment as a wat er spray including, if desired, up to 1 quart of di esel oil, fuel
oil, stove oil, or crop oil concentrate per gallon of water (see " Mixing Instructions "). Make application
before new growth on Douglas fir is 2 inches long. To release ponderosa pine from the same species, t reat
before new pine growth begins in the spring. Addit ion of oil or oil concentrate may cause unacceptabl e injury
to pines. For dormant applications in late winter or early spring for control of susceptible woody sp ecies such
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 21
as alder, willow, poplars, cherry, vine maple, cean othus, tanoak, madrone, and manzanita, apply up to 3
pints per acre in a minimum of 10 gallons spray mix ture (with diesel oil, etc.) per acre. Apply this dormant
treatment in diesel oil, fuel oil, stove oil, or ot her suitable diluent such as water plus crop oil co ncentrate (see
"Mixing Instructions"). Do not use in plantations where pine and larch are among the desired crop species.
To control hazel dodder ( cuscuta coryli ) in the Lake states, apply up to 2 pints per acre in a minimum of 10
gallons spray mixture per acre. Apply as a water s pray when new shoot growth of hazel is complete (us ually
mid-July).
After conifer species such as white pine, ponderosa pine, jack pine, red pine, black spruce, white spr uce, red
spruce, and balsam fir crease growth and harden off and brush is still actively growing in late summer , apply
up to 3 pints per acre in a minimum of 10 gallons w ater spray mixture per acre. Apply as a water spra y to
control certain competing hardwoods such as alder, aspen, birch, hazel and willow. However, if possib le
injury cannot be tolerated, do not use since this treatment may cause conifer injury.
Forest Roadsides: To control susceptible broadleaf weeds and woody plants on forest roadsides, apply 1
to 3 pints per acre in a minimum of 10 gallons wate r spray mixture per acre. Apply as a water spray a nd, if
necessary to ensure penetration of foliage, include up to 3 quarts per acre of diesel oil, fuel oil, s tove oil, or
crop oil concentrate (see "Mixing Instructions").
FOREST MANAGEMENT RESTRICTIONS:
 Do not apply under drip line of desirable trees or adjacent to desirable vegetation.
 Maximum: 1 application per year.
 Do not apply more than 1 gallon of product per acr e per year
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 2.0 pounds of a.e. per acre per year.
ROADSIDES; MEDIANS; HIGHWAY, RAILROAD, UTILITY AND PIPELINE RIGHTS-OF-WAY; VACANT
LOTS; AROUND UTILITY INSTALLATIONS, TRANSFORMERS, P UMP HOUSES, AND BUILDINGS;
STORAGE AREAS; FENCES; GUARDRAILS; LUMBER YARDS; IN DUSTRIAL SITES; AIRPORTS;
TANK FARMS; FARMSTEADS; AND SIMILAR NONCROP AREAS
For control of listed broadleaf weeds and small woo dy plants, apply 2/3 to 2 pints per acre diluted in 10
gallons of water. Use the high rate for woody plan ts. Applications may be as broadcast sprays, small area
sprays or spot treatments. For small areas or spot spraying, use 2 fluid ounces per gallon of water a nd spray
weeds to runoff. Regardless of the method of appli cation, use adequate spray volume for full coverage of
weeds. Application timing is in the early spring w hen sufficient weeds have emerged, and when weeds a re
small and actively growing, but before weeds exceed size limits described in weed tables. Summer
applications to older, drought-stressed weeds are l ess effective. However, listed weeds are more
susceptible again in the fall when cooler, wetter c onditions support active growth before a killing fr ost. For
fall treatment of mature weeds or perennial weed re growth, use up to 1.0 pints per acre diluted in 10 gallons
of water. Several seasons of spring plus fall trea tments may be necessary to control certain listed
perennials. Use of oil sprays or the addition of s pray adjuvants improves weed control, but also incr eases
the risk of damage to desirable ground covers.
Precautions :
Plant Response : Bent grass, other warm season or southern grasses , alfalfa, clover, or other legumes may
be killed or injured.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 22
NONCROP USE RESTRICTIONS :
 Do not apply under drip line of desirable trees or adjacent to desirable vegetation.
 Do not apply when grass is in boot to milk stage, or after heading begins, if grass production is des ired.
 Do not reseed for at least 30 days following last application.
 Do not apply to newly seeded areas until grass is well established.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 2.0 pounds of a.e. per acre per year.
CONSERVATION RESERVE PROGRAMS AND GENERAL FARMSTEAD
HM-1604 HERBICIDE is for use for Conservation Reserve Programs, general farmstead (non-cropland
only), weed and brush control, or use in State Recognized Noxious Weed areas (non-cropland areas).
Refer to Tables 1 and 2 for rate selection based on targeted weed or brush species. Some weed species will
require tank mixes for adequate control.
It is the pesticide users responsibility to ensure that all products in the listed mixtures are regis tered for the
intended use. Users must follow the most restricti ve directions and precautionary language of the pro ducts
in the mixture.
RESTRICTIONS:
 Do not make more than 2 applications per year. Min imum of 30 days between applications.
 Rates above 2 1/2 pints of HM-1604 HERBICIDE per acre are for spot treatments only.
 Retreatments may be made as needed; however, do no t exceed a total of 4 3/4 pints of HM-1604
HERBICIDE per treated acre during a growing season.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 2.0 pounds of a.e. per acre per year.
FARMSTEAD AND FENCE-ROW TREATMENT APPLICATION INSTR UCTIONS
HM-1604 HERBICIDE may be applied using water or oil and water emulsi ons in spot application to control
undesirable vegetation using handgun or similar typ es of application equipment. In addition to weed s pecies
listed in Tables 1 and 2, these treatments may be u sed to control or suppress woody plant species list ed in
Table 7.
To prepare soil and water emulsions, mix in the ord er and proportions indicated below.
1. Water: Begin by agitating a thoroughly clean sp rayer tank with the desired quantity of clean water .
Maintain constant agitation during complete mixing procedure.
2. Emulsifier: Add 0.5% volume to volume of water.
3. HM-1604 HERBICIDE : add 1.5 gallons per 100 gallons of total intended solution.
4. Diesel Oil: Add 10 gallons per 100 gallons of to tal intended solution.
One gallon of HM-1604 HERBICIDE in forty gallons of spray solution contains 1.0 pounds acid equivalent of
dicamba and 2.3 pounds acid equivalent of 2,4-D. Spray plants to wet.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 23
The solution should remain milky colored without an oily layer on top when under agitation. If an oil y layer
forms, increase the amount of emulsifier or change to a more effective emulsifier.
To control listed brush, briars, and weeds along fence-rows surrounding pasture and ranch lands, and f allow
fields, use a tank mix of 1.5% HM-1604 HERBICIDE , 88.5% water, 10% diesel oil, and sufficient emuls ifier
(to mix the diesel and emulsifier). The diesel oil in this tank mix will damage or kill desirable grasses, do not
use in pastures or where damage to desirable species cannot be tolerated.
Maintain constant agitation during application. Under good agitation, the spray solution should be milky
white with no oil layer on top. If oil layer forms , increase the amount of emulsifier or change to a more
effective emulsifier.
FOR SPRAYING FOLIAR APPLICATIONS :
1. Spray when leaves have reached full size but hav e not hardened due to drought or maturity.
2. Spray individual plants to wet with handgun.
3. For larger stems (up to 3" in diameter) and hard to control species, direct spray stream to base of stems
to wet the stem at soil surface in addition to wetting the foliage.
4. Do not apply under drip line of desirable trees or adjacent to desirable vegetation.
FOR DORMANT BASAL APPLICATIONS :
1. Increase diesel oil content to 15% or 15 gallons of diesel oil per 100 gallons of total solution.
2. Spray in late winter and early spring before pla nts break dormancy.
3. Spray the bottom 24" of the target stem to wet o n all sides.
4. For larger stems (up to 3" in diameter) and hard to kill species direct the spray solution to the base of
target stems to wet the soil at the stem/soil junction in addition to wetting the stem.
FOR CUT SURFACE TREATMENTS :
Apply HM-1604 HERBICIDE in an undiluted state as a cut surface treatment to control unwanted trees and
prevent sprouts of cut trees.
 Frill or Girdle Treatments: Make a continuous cut or a series of overlapping cuts using an axe to girdle
tree trunk. Spray or paint the cut surface with HM-1604 HERBICIDE .
 Stump Treatments: Spray or paint freshly cut surf ace with HM-1604 HERBICIDE . Thoroughly wet the
cambium layer (the area adjacent to the bark). Treat stumps within 6 hours after cutting.
 Basal spray, Cut Surface (stumps and frill): Limit of one basal spray or cut surface application per year.
Maximum of 8.0 lbs of 2,4-D a.e. per 100 gallons of spray solution.
Table 7. The following list of trees and vines can be controlled on farmsteads and fencerows as foliar, basal,
or cut surface treatments:
Alder
Ash
Aspen
Basswood
Beech
Blackberry
Blackgum
Cedar
Cherry
Chinquapin
Cottonwood
Creosotebush
Dewberry
Dogwood
Elm
Grape
Greenbriar
Hawthorn (Thornapple)
Hemlock
Hickory
Honeylocust
Honeysuckle
Hornbeam
Huckleberry
Huisache
Ivy, Poison
Kudzu
Locust, Black
Maple
Mesquite
Oak
Oak, Poison
Olive, Russian
Persimmon, Eastern
Pine
Plum, Sand (Wild Plum)
Poplar
Rabbitbrush
Redcedar, Eastern
Rose, McCartney
Rose, Multiflora
Sagebrush, Fringe
Sassafras
Spruce
Sumac
Sweetgum
Sycamore
Tarbrush
Willow
Witchhazel
Yaupon
Yucca
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 24
RESTRICTIONS:
 Do not exceed 40 gallons of spray solution per tre ated acre per application.
 Do not allow this spray mix to contact desirable v egetation.
 Do not apply under drip line of desirable trees or adjacent to desirable vegetation.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application.
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 2.0 pounds of a.e. per acre per year.
SOD FARMS
For best results, do not mow turf 1 to 2 days befor e or after application. Delay turf watering until t he day after
application. Do not apply to newly seeded areas unt il grass is well established and has been mowed sev eral
times. A period of about 30 days after application is usually a sufficient interval before reseeding. Seeding a
small area and observing response is recommended before large scale seeding.
COOL SEASON GRASSES:
To control listed emerged broadleaf weeds in cool s eason turfgrasses such as tall fescue, bluegrass, o r
perennial ryegrass, apply 1.0 - 4.0 pints per acre. Apply when weeds are small and actively growing un der
good moisture conditions.
Use sufficient spray solution for thorough and uniform coverage, and no less than 2 gallons per acre.
COOL SEASON GRASS RESTRICTIONS:
 Do not use on creeping grasses such as bentgrass e xcept as a spot treatment.
 Do not use on dichondra or other herbaceous ground covers. Legumes may be damaged or killed.
 Reseeding: Delay reseeding at least 30 days follow ing application. With spring application, reseed in the
fall and with fall application, reseed in the spring.
 Do not use on carpetgrass, bentgrass, or Dichondra turf, or where desirable clovers are present.
WARM SEASON GRASSES:
To control many broadleaf weeds in warm season turf grasses such as common bermudagrass, hybrid
bermudagrass, bahiagrass, zoysiagrass, buffalograss , centipedegrass, seashore paspalum, or kikuyugrass ,
apply up to 1.5 pints per acre. Apply when weeds are small and actively growing under moist conditions.
To control many broadleaf weeds in common St. Augus tine, apply up to 1.5 pints per acre. Apply when
weeds are small and actively growing under moist co nditions.
St. Augustine Precautions:
 If dry conditions exist, irrigate 8 hours before a nd 8 hours after application.
 Over application of this product can cause turf in jury (discoloration, turf thinning, stunting and even turf
death).
 To avoid turf injury, use only on turfgrass that i s reasonably free of stress from diseases, insects, excess
heat or cold, drought or excess rainfall/irrigation, shaded areas, low soil pH, nematodes, improper
mowing or improper applications of fertilizer and pesticides. Injury can occur if this product is applied
under any of these or other stress conditions. Under any of these stress conditions, any turf damage
caused by the use of this product is beyond the control of Helena Agri-Enterprises, LLC and all risk is
assumed by the buyer and/or user.
 If any discoloration is objectionable or any level of phytotoxicity, then do not add surfactant or adjuvants
to HM-1604 HERBICIDE.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 25
WARM SEASON PRECAUTIONS:
 Do not use tank mixture combinations; unless your experience indicates that the tank mixture will not
result in turf injury.
WARM SEASON RESTRICTIONS:
 Do not apply HM-1604 HERBICIDE to Floratam, Bitterblue and other improved var ieties of St.
Augustinegrass.
 Do not mow 2 days before and until 2 days after th e application of this product.
 Do not broadcast or spot apply HM-1604 HERBICIDE to St. Augustinegrass during spring green-up,
which is the transition period between dormancy and active growth.
 Do not broadcast or spot apply HM-1604 HERBICIDE to St. Augustinegrass during the fall to winter
transition or if temperatures are expected to drop below 40°F within ten (10) days of application
 Do not broadcast apply HM-1604 HERBICIDE when ambient temperatures are below 50°F or above
85°F; some injury may be expected with spot treatme nts when air temperatures exceed 85°F.
SOD FARM RESTRICTIONS (Warm and Cool Season Use) :
 Do not make more than 2 applications per year (exc luding spot treatments).
 Do not apply more than 4 pints (0.5 lb a.e dicamba and 1.15 lb a.e. 2,4-D) product per acre per
application on cool season grass varieties..
 Do not apply more than 1.5 pints (0.19 lb a.e dica mba and 0.43 lb a.e. 2,4-D) product per acre per
application on warm season grass varieties.
 Minimum spray interval between broadcast applicati ons is 21 days.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application or a tot al of
2.0 pounds of a.e. per acre per year..
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 4.0 pounds of a.e. per acre per year.
ORNAMENTAL AND RECREATIONAL TURFGRASSES, LAWNS,
GOLF COURSES (Fairways, Aprons, Tees, and Roughs), PARKS AND CEMETERIES
Refer to " Turf Use Requirements " in the " Non-Agricultural Use Requirements " section. For best results,
do not mow turf 1 to 2 days before or after applica tion. Delay turf watering for at least 1 hour after
application. Product in contact with desirable tree s, shrubs, flowers or vegetables since plant injury may
result. Do not apply to newly seeded areas until gr ass is well established and has been mowed several
times. A period of about 30 days after application is usually a sufficient interval before reseeding g rasses (or
other plants). Seeding a small area and observing response is recommended before large scale seeding.
COOL SEASON GRASSES:
To control listed emerged broadleaf weeds in cool s eason turfgrasses such as tall fescue, bluegrass, o r
perennial ryegrass, apply 2.0 - 3.0 pints per acre (0.75 to 1.0 fluid ounces per 1,000 square feet). A pplication
timing for broadcast treatment is in the early spri ng when small weeds have emerged and are actively
growing under good moisture conditions. For very w eedy turf, a follow-up broadcast or spot applicatio n may
be needed from 2 to 4 weeks later. Summer applicati ons are typically spot treatments of individual wee ds
that have emerged after a spring broadcast treatmen t. In the fall when cooler, wetter conditions favor active
weed growth, broadcast application may be appropria te for very weedy turf, such as an area that had no
spring broadcast treatment.
WARM SEASON GRASSES:
To control listed broadleaf weeds in warm season tu rfgrasses such as common bermudagrass, hybrid
bermudagrass, bahiagrass, zoysiagrass, buffalograss , centipedegrass, seashore paspalum, or kikuyugrass ,
apply up to 1.5 pints per acre. Apply when weeds are small and actively growing under moist conditions.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 26
Do not use where desirable clovers are present.
To control listed broadleaf weeds in common St. Aug ustine, apply up to 1.5 pints per acre. Apply when
weeds are small and actively growing under moist co nditions.
St. Augustine Precautions :
 If dry conditions exist, irrigate 8 hours before a nd 8 hours after application.
 Over application of this product can cause turf in jury (discoloration, turf thinning, stunting and even turf
death).
 Do not use tank mixture combinations; unless your experience indicates that the tank mixture will not
result in turf injury.
 To avoid turf injury, use only on turfgrass that i s reasonably free of stress from diseases, insects, excess
heat or cold, drought or excess rainfall/irrigation, shaded areas, low soil pH, nematodes, improper
mowing or improper applications of fertilizer and pesticides. Injury can occur if this product is applied
under any of these or other stress conditions. Under any of these stress conditions, any turf damage
caused by the use of this product is beyond the control of Helena Agri-Enterprises, LLC and to the extent
consistent with applicable law all risk is assumed by the buyer and/or user.
St. Augustine RESTRICTIONS :
 Do not apply HM-1604 HERBICIDE to Floratam, Bitterblue and other improved varieties of St.
Augustinegrass.
 Do not mow 2 days before and until 2 days after th e application of this product.
 Do not broadcast or spot apply HM-1604 HERBICIDE to St. Augustinegrass during spring green-up,
which is the transition period between dormancy and active growth.
 Do not broadcast or spot apply HM-1604 HERBICIDE to St. Augustinegrass during the fall to winter
transition or if temperatures are expected to drop below 40°F within ten (10) days of application
 Do not broadcast apply HM-1604 HERBICIDE when ambient temperatures are below 50°F or above
85°F; some injury may be expected with spot treatme nts when air temperatures exceed 85°F.
ORNAMENTAL TURFGRASS RESTRICTIONS :
 Do not apply more than 4 pints (0.5 lb a.e dicamba and 1.15 lb a.e. 2,4-D) product per acre per
application on cool season grass varieties.
 Do not apply more than 1.5 pints (0.19 lb a.e dica mba and 0.43 lb a.e. 2,4-D) product per acre per
application on warm season grass varieties.
 Do not make more than 2 applications per year on cool and warm season grasses.
 Minimum spray interval between broadcast applications is 30 days.
HM-1604 HERBICIDE contains 0.125 pounds a.e. of dicamba per pint. W hen tank mixing with products that
contain dicamba, do not exceed a combined total of 1.0 pound of a.e. per acre per application or a tot al of
2.0 pounds of a.e. per acre per year..
HM-1604 HERBICIDE contains 0.29 pounds a.e. of 2,4-D per pint. When tank mixing with products that
contain 2,4-D, do not exceed a combined total of 4.0 pounds of a.e. per acre per year.
Weeds listed in this label:
Common Name Scientific Name
ANNUALS
Amaranth, Palmer
, Powell
, Spiny
Beebalm, Spotted
Black Medic
Broomweed, Common
Buckwheat, Wild
Buffalobur
Burdock
Buttercup, Corn
Carpetweed
Amaranthus palmeri
Amaranthus powellii
Amaranthus spinosus
Monarda punctata
Medicago lupulina
Gutierrezia dracunculoides
Fallopia convovulus
Solanum rostratum
Arctium spp.
Ranunculus arvensis
Mollugo verticillata
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 27
Common Name Scientific Name
Chickweed, Common
Cockle, Corn
Cocklebur, Common
Coreopsis, Plains
Croton, Woolly
Devilsclaw
Dogfennel (Cypressweed)
Eveningprimrose, Cutleaf
Flax
Fleabane, Annual
Flixweed
Henbit
Knotweed, Prostrate
Kochia
Lambsquarters, Common
Lettuce, Prickly
Mallow, Common
Marestail (Horseweed)
Morningglory, Ivyleaf
Tall
Mustard, Annual
Tansy
Pennycress, Field
Pepperweed, Virginia
Pigweed, Prostrate,
Redroot,
Smooth,
Tumble
Pineapple weed
Poorjoe
Puncturevine
Purslane, Common
Ragweed, Common,
Lance-leaf,
Western
Rocket, London
, Yellow
Sedge
Shepherdspurse
Smartweed, Pennsylvania
Sneezeweed, Bitter
Sunflower, Common (wild)
Thistle, Russian
Woodsorrel, Common
, Yellow
Stellaria media
Agrostemma githago
Xanthium strumarium
Coreopsis tinctoria
Croton capitatus
Proboscidea louisianica
Eupatorium capillifolium
Oenothera laciniata
Linum spp.
Erigeron annuus
Descurainia sophia
Lamium amplexicaule
Polygonum aviculare
Kochia scoparia
Chenopodium album
Lactuca serriola
Malva neglecta
Conyza canadensis
Ipomea hederacea
Ipomea purpurea
Brassica spp.
Descurainia pinnata
Thlaspi arvense
Lepidium virginicum
Amaranthus blitoides
Amaranthus retroflexus
Amaranthus hybridus
Amaranthus albus
Matricaria discoidea
Diodia teres
Tribulus terrestris
Portulaca oleracea
Ambrosia artemisiifolia
Ambrosia bidentata
Ambrosia psilostachya
Sisymbrium irio
Barbarea vulgaris
Cyperus compressus
Capsella bursa-pastoris
Polygonum pensylvanicum
Helenium amarum
Helianthus annuus
Salsola iberica
Oxalis acetosella
Oxalis stricta
Common Name Scientific Name
BIENNALS AND PERENNIALS
Bindweed, field
Bittercress
Buckeye
Bull nettle
Carrot, Wild
Chickweed, Field
, Mouseear
Chicory
Clover
Clover, Hop
Dandelion
Dock, Curly
Elderberry
Goldenrod, Missouri
Convolvulus arvensis
Cardamine spp.
Aesculus spp.
Cnidoscolus stimulosus
Daucus carota
Cerastium arvense
Cerastium fontanum
Cichorium intybus
Trifolium spp
Trifolium aureum
Taraxacum officinale
Rumex crispus
Sambucus canadensis
Solidago missouriensis
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 28
Common Name Scientific Name
Goldenweed, Common
Groundsel
Honeysuckle, Hairy
Horsenettle
Ironweed
Ivy, Poison
Knapweed, Black
Russian
Spotted
Marshelder
Mesquite
Milkweed, Antelope-horns
Nettle, Stinging
Nightshade, Silverleaf
Black
Persimmon, Eastern
Plaintain, Broadleaf
, Buckhorn
Rabbitbrush
Ragwort, Tansy
Redvine
Sagebrush, Fringed
Smartweed, Swamp
Sorrel, Red (Sheep Sorrel)
Sowthistle, Perennial
Spurge, Leafy
Starthistle, Yellow
Tallow Tree, Chinese
Teasel
Thistle, Bull
Canada
Musk
Plumeless
Toadflax, Dalmatian
Vetch
Yankeeweed
Yarrow, Common
Iscoma coronopifolia
Senecio vulgaris
Lonicera hispidula
Solanum carolinense
Vernonia fasciculata
Rhus radicans
Centaurea nigra
Rhaponticum repens
Centaurea stoebe
Iva annua
Prosopis spp
Asclepias asperula
Urtica dioica
Solanum elaeagnifolium
Solanum nigrum
Diospyros virginiana
Plantago major
Plantago lanceolata
Chrysothamnus pulchellus
Jacobaea vulgaris
Brunnichia ovata
Artemisia frigida
Polygonum hydropiperoides
Rumex acetosella
Sonchus arvensis
Euphorbia esula
Centaurea solstitialis
Triadica sebifera
Dipsacus fullonum
Cirsium vulgare
Cirsium arvense
Carduus nutans
Carduus acanthoides
Linaria dalmatica
Vicia spp.
Eupatorium compositifolium
Achillea millefolium
Food/Feed Crop Uses
This product can be used on the following:
 Conservation Reserve Program Land
 Fallow Systems (Between Crop Application)
 General Farmstead
 Grain Sorghum
 Grass (Hay or Silage)
 Industrial Sites
 Pastures
 Rangeland
 Rights-of-way
 Roadsides
 Non-crop Areas
 Wheat
 Sod Farms
 Ornamental & Recreational Turf
These crops are considered Food/Feed crops only whe n harvested, grazed, or foraged. Otherwise, they are
considered non-Food/Feed uses.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 29
STORAGE AND DISPOSAL
PROHIBITIONS: Do not contaminate water, food, or fe ed by storage or disposal. Do not store under
conditions that might adversely affect the container or its ability to function properly.
PESTICIDE STORAGE: Do not store below temperature o f 32°F or above 100°F. Store in original container
in a well-ventilated area separately from fertilize r, feed, and foodstuffs. Keep container tightly clo sed when
not in use. Reduce stacking height where local conditions can affect package strength.
PESTICIDE DISPOSAL: Pesticide wastes are toxic. Was tes resulting from this product may be disposed of
on site or at an approved waste disposal facility. Improper disposal of excess pesticide, spray mixtur e, or
rinsate is a violation of Federal law and may conta minate groundwater. If these wastes cannot be dispo sed
of by use according to label instructions, contact your State Pesticide or Environmental Control Agenc y, or
the Hazardous Waste representative at the nearest E PA Regional Office for guidance.
CONTAINER DISPOSAL: Non-refillable containers (1, 2 .5, 30 & 55 gallon): Do not reuse or refill this
container. Offer for recycling, if available. Tripl e rinse or pressure rinse container (or equivalent) promptly
after emptying.
(Non-refillable <5 gallons): Triple rinse as follows: Empty the remaining contents into application eq uipment
or a mix tank and drain for 10 seconds after the flow begins to drip. Fill the container ¼ 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.
Then offer for recycling if available or puncture and dispose of in a sanitary landfill or by incineration, or, if
allowed by state and local authorities, by burning. If burned, state out of smoke.
(Non-refillable >5 gallons): Triple rinse as follows: Empty the remaining contents into application eq uipment
or a mix tank. Fill the container ¼ 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. The n offer for recycling if available or puncture and dispose
of in a sanitary landfill or by incineration, or, if allowed by state and local authorities, by burning. If burned,
state out of smoke.
Pressure rinse as follows (all sizes): Empty the remaining contents into application equipment or a mi x 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 for disposal. Insert pressure rinsing nozzle
inside of the container, and rinse at about 40 PSI for at least 30 seconds. Drain for 10 seconds after the flow
begins to drip.
Refillable container (250 gallon & bulk): Refill this container with pesticide only. Do not reuse this container
for any other purpose. Cleaning the container before final disposal is the responsibility of the person
disposing of the container. Cleaning before refilling is the responsibility of the refiller.
To clean the container before final disposal, empty the remaining contents from the container into app lication
equipment or mix tank. Fill the container about 10 percent full with water. Agitate vigorously or recirculate
water with the pump for 2 minutes. Pour or pump rinsate into application equipment or rinsate collect ion
system. Repeat this rinsing process two more times . Then offer for recycling if available or puncture and
dispose of in a sanitary landfill or by incineration, or, if allowed by state and local authorities, b y burning. If
burned, state out of smoke.
In Case of Spill: In case of large-scale spillage regarding this product, call ChemTrec 800-424-9300.
Steps to be taken in case material is released or spilled:
Dike and contain the spill with inert material (san d, earth, etc) and transfer liquid and solid diking material to
separate containers for disposal. Remove contaminat ed clothing, and wash affected skin areas with soap
and water. Wash clothing before re-use. Keep the spill out of all sewers and open bodies of water.
Filename: HM-1604 Herbicide (5905-AUG) 120321 CLN 30
CONDITIONS OF SALE AND WARRANTY
The DIRECTIONS FOR USE of this product reflect the opinion of experts based on field use and tests. T he
directions are believed to be reliable and should b e followed carefully. Crop injury, ineffectiveness , or other
unintended consequences may result because of such factors as weather conditions or presence of other
materials. All such risks shall be assumed by the Buyer.
HELENA AGRI-ENTERPRISES, LLC warrants that this pro duct conforms to the chemical description on the
label and is reasonably fit for the purposes referr ed to in the Directions for Use subject to the inhe rent risks
referred to above. TO THE EXTENT CONSISTENT WITH A PPLICABLE LAW, HELENA AGRI-
ENTERPRISES, LLC MAKES NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR ANY
PARTICULAR PURPOSE OR OF MERCHANTABILITY OR ANY OTH ER EXPRESS OR IMPLIED
WARRANTY. TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, THIS WARRANTY DOES NOT
EXTEND TO, AND THE BUYER SHALL BE SOLELY RESPONSIBL E FOR, ANY AND ALL LOSS OR
DAMAGE WHICH RESULTS FROM THE USE OF THIS PRODUCT I N ANY MANNER WHICH IS
INCONSISTENT WITH THE LABEL DIRECTIONS.
TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, BUYER 'S EXCLUSIVE REMEDY AND
MANUFACTURER'S OR SELLER'S EXCLUSIVE LIABILITY FOR ANY AND ALL CLAIMS, LOSSES,
DAMAGES, OR INJURIES RESULTING FROM THE USE OR HAND LING OF THIS PRODUCT, WHETHER
OR NOT BASED IN CONTRACT, NEGLIGENCE, STRICT LIABIL ITY IN TORT OR OTHERWISE, SHALL
BE LIMITED, AT THE MANUFACTURER'S OPTION, TO REPLAC EMENT OF OR THE REPAYMENT OF
THE PURCHASE PRICE FOR THE QUANTITY OF PRODUCT WITH RESPECT TO WHICH DAMAGES
ARE CLAIMED. When Buyer suffers losses or damages resulting from the use or handling of this product
(including claims based on contract, negligence, st rict liability, or other legal theories), Buyer mus t promptly
notify Seller in writing of any claims to be eligib le to receive either remedy stated above. TO THE EX TENT
CONSISTENT WITH APPLICABLE LAW, IN NO CASE SHALL HE LENA AGRI-ENTERPRISES, LLC OR
THE SELLER BE LIABLE FOR CONSEQUENTIAL, SPECIAL OR INDIRECT DAMAGES RESULTING
FROM THE USE OR HANDLING OF THIS PRODUCT. HELENA A GRI-ENTERPRISES, LLC and the Seller
offer this product, and the Buyer accepts it, subje ct to the foregoing Conditions of Sale and Warranty , which
may be varied only by agreement in writing signed b y a duly authorized representative of HELENA AGRI-
ENTERPRISES, LLC. No employee or agent of HELENA A GRI-ENTERPRISES, LLC or the Seller is
authorized to vary or exceed the terms of this Warr anty in any other manner.