crop-chem-docs/corpus/epa_ppls/5905-590.md

# HM-1144 HERBICIDE

- EPA Reg No: **5905-590**
- Registrant: HELENA AGRI-ENTERPRISES, LLC, D/B/A HELENA CHEMICAL COMP
- Signal word: Warning
- Active ingredients: MCPA (25.94%); Clopyralid (6%); Fluroxypyr 1-methylheptyl ester (10.02%)
- Label accepted: 2025-02-20
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/005905-00590-20250220.pdf

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1 
 
 
February 20, 2025 
 
Jayne Walz 
Director of Registrations 
Helena Agri-Enterprises, LLC D/B/A Helena Chemical Company 
225 Schilling Boulevard, Suite 300 
Collierville, TN 38017 
 
 
Subject: Label Amendment – Add State Restrictions and Minor Typographical Corrections 
& Incorporating Mitigation Measures from the Registration Review Interim 
Decisions for MCPA, Fluroxypyr, and Clopyralid 
 Product Name: HM-1144 Herbicide 
 EPA Registration Number: 5905-590 
Application Date: February 13, 2023, August 31, 2023, August 20, 2021, April 21, 
2021 
 Case Number: 476353, 473953, 482171, 482875 
 
Dear Jayne Walz: 
 
The amended label referred to above, submitted in connection with registration under the 
Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), as amended, is acceptable. This 
approval does not affect any conditions that were previously imposed on this registration. You 
continue to be subject to existing conditions on your registration and any deadlines connected 
with them. 
 
The Agency, in accordance with the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA), 
as amended, has completed reviewing all of the information submitted with your application to 
support the Registration Review of the above referenced product in connection with the MCPA, 
Clopyralid and Fluroxypyr Interim Decisions, and has concluded that your submission is 
acceptable. 
 
A stamped copy of your labeling is enclosed for your records. This labeling supersedes all 
previously accepted labeling. You must submit one copy of the final printed labeling before you 
release the product for shipment with the new labeling. In accordance with 40 CFR 152.130(c), 
you may distribute or sell this product under the previously approved labeling for 12 months 
from the date of this letter. After 12 months, you may only distribute or sell this product if it

Page 2 of 2 
EPA Reg. No. 5905-590 
Case No. 476353, 473953, 482171, 482875 
 
bears this new revised labeling or subsequently approved labeling. “To distribute or sell” is 
defined under FIFRA section 2(gg) and its implementing regulation at 40 CFR 152.3. 
 
Should you wish to add/retain a reference to the company’s 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) lists examples of 
statements EPA may consider false or misleading. In addition, regardless of whether a website 
is referenced on your product’s 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 EPA’s Office of Enforcement and Compliance. 
 
Your release for shipment of the product constitutes acceptance of these conditions. If these 
conditions are not complied with, the registration will be subject to cancellation in accordance 
with FIFRA section 6. 
 
If you have any questions, please contact Derek Corbin at 202-566-2571 or at 
Corbin.Derek@epa.gov. 
 
 Sincerely, 
 
Kable Bo Davis 
 Kable Bo Davis; Senior Advisor 
 Office of Pesticide Programs 
 Registration Division; Immediate Office 
 
 
 
Enclosure

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 1 
 
MCPA GROUP 4 HERBICIDE 
Fluroxypyr GROUP 4 HERBICIDE 
Clopyralid GROUP 4 HERBICIDE 
 
HM-1144 Herbicide 
Miscible Concentrate 
 
For control of annual and perennial broadleaf weeds in wheat, barley, and oats not underseeded with a 
legume, grasses grown for seed, and non-crop areas (rights-of-way, roadsides, highways, industrial sites, 
fence rows, non-irrigation ditch banks, recreational areas and similar non-crop areas) 
 
ACTIVE INGREDIENTS: % w / w 
MCPA, 2-Methyl-4-Chlorophenoxyacetic Acid*................................................................................ 25.94% 
Fluroxypyr, 1-methylheptyl ester ((4-amino-3,5-dichloro-6-fluoro-2-pyridinyl)oxy) 
acetic acid,1-methylheptyl ester** .................................................................................................... 10.02% 
Clopyralid, 3,6-dichloro-2-pyridinecarboxylic acid***........................................................................... 6.00% 
OTHER INGREDIENTS .................................................................................................................... 58.04% 
TOTAL ................................................. 100.00% 
 
Acid Equivalents 
* - Isomer Specific AOAC Method, Equivalent to: *2- Methyl-4-Chlorophenoxyacetic Acid - 25.94% (2.48 lbs/gal) 
** - Fluroxypyr: ((4-amino-3,5-dichloro-6-fluoro-2-pyridinyl)oxy)acetic acid - 6.95% (0.66 Ib/gal) 
*** - Clopyralid: 3,6-dichloro-2-pyridinecarboxylic acid - 6.0% (0.57 Ib/gal) 
 
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 to explain it to you in detail.) 
 
See Attached Booklet for Precautionary Statements and Use Directions 
 
FIRST AID 
If in eyes: Hold eye open and rinse slowly and gently with water for 15 -20 minutes. Remove 
contact lenses, if present, after the first 5 minutes, then continue rinsing eye. Call a 
poison control center or doctor for treatment advice. 
If swallowed: Immediately call a poison control center or doctor. Do not induce vomiting unless told 
to do so by a poison control center or doctor. Have person sip a glass of water if able 
to swallow. Do not give anything by mouth to an unconscious person. 
If on skin or 
clothing: 
Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 
minutes. Call a poison control center or doctor for treatment advice. 
HOTLINE NUMBER 
NOTE TO PHYSICIAN: Have the product container or label with you when calling a poison control 
center or doctor, or going for treatment. 
FOR A MEDICAL EMERGENCY INVOLVING THIS PRODUCT CALL CHEMTREC: 1-800-424-9300. 
 
EPA REG. NO. 5905-590 EPA EST. NO.__________ 
AD NET CONTENTS ____ GAL. 
 
Manufactured for 
Helena Agri-Enterprises, LLC 
 225 Schilling Boulevard, Suite 300 
 Collierville, TN 38017 
 
 
02/20/2025
5905-590

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 2 
 
PRECAUTIONARY STATEMENTS 
HAZARDS TO HUMANS AND DOMESTIC ANIMALS 
WARNING 
Causes substantial but temporary eye Injury. Harmful is swallowed. Do not get in eyes or on clothing. 
Wear protective eyewear. Wash thoroughly with soap and water after handling and before eating, 
drinking, chewing gum, using tobacco or using the toilet. Remove and wash contaminated clothing before 
reuse. Wear: Long-sleeved shirt and long pants, socks, shoes, and chemical-resistant gloves. Prolonged 
or frequently repeated skin contact may cause allergic reactions in some individuals. 
 
Personal Protective Equipment (PPE): 
Some materials that are chemical-resistant to this product are listed below. 
 
Applicators and other handlers must wear: 
• long-sleeved shirt and long pants, 
• socks, 
• chemical-resistant footwear 
• chemical resistant gloves made of Barrier Laminate, Nitrile Rubber ≥ 14 mils, Neoprene Rubber ≥ 
14 mils, or Viton ≥ 14 mils. 
• protective eyewear 
 
Follow manufacturer's instructions for cleaning/maintaining Personal Protective Equipment (PPE). If no 
such instructions for washables, use detergent and hot water. Keep and wash PPE separately from other 
laundry. 
 
Engineering Controls Statements: When handlers use closed systems, enclosed cabs, or aircraft in a 
manner that meets the requirements listed in the Worker Protection Standard (WPS) for agricultural 
pesticides (40 CFR 170.607(e-f)), Handlers must use closed mixing loading systems during mixing and 
loading liquids for aerial application to barley, oats, wheat, and grass grown for seed. 
 
USER SAFETY RECOMMENDATIONS 
Users should: Wash hands before eating, drinking, chewing gum, using tobacco or using the toilet. 
Remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly and put on clean 
clothing. 
 
ENVIRONMENTAL HAZARDS 
Drift or run-off may adversely affect nontarget plants. Do not apply directly to water, or to areas where 
surface water is present or to intertidal areas below the mean high-water mark. Do not contaminate water 
when disposing of equipment washwaters or rinsate nor pour washwaters on the ground; spray or drain 
over a large area away from wells and other water sources. Do not apply this product through any type of 
irrigation system. 
 
Do not contaminate domestic or irrigation waters. Spray equipment used in applying this product should 
be thoroughly cleaned before using for any other purpose. Use repeated flushing with soap and warm 
water or suitable chemical cleaner. It is best to use a separate sprayer for application of insecticides and 
fungicides. This product will kill or seriously injure many desirable forms of vegetation. Do not apply 
directly to flowers, fruits, grapes, tomatoes, ornamentals, cotton or other desirable plants. Vapors from 
this product may injure susceptible plants in the immediate vicinity. Do not apply when weather conditions 
favor drift from target area. Avoid use of small diameter nozzles. (Coarse sprays are less likely to drift.) 
Excessive amounts of this product in the soil may temporarily inhibit seed germination and plant growth. 
 
Most cases of groundwater contamination involving phenoxy herbicides such as MCPA have been 
associated with mixing/loading and disposal sites. Caution should be exercised when handling MCPA 
pesticides at such sites to prevent contamination of groundwater supplies. Use of closed systems for

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 3 
 
mixing and transferring this pesticide will reduce the probability of spills. Placement of the mixing/loading 
equipment on an impervious pad to contain spills will help prevent groundwater contamination. 
Clopyralid is a chemical which can travel (seep or leach) through soil and under certain conditions 
contaminate groundwater which may be used for irrigation or drinking purposes. Users are advised not to 
apply clopyralid where soils have a rapid to very rapid permeability throughout the profile (such as loamy 
sand to sand) and the water table of an underlying aquifer is shallow, or to soils containing sinkholes over 
limestone bedrock, severely fractured surfaces, and substrates which would allow direct introduction into 
an aquifer. Your local agricultural agencies can provide further information on the type of soil in your area 
and the location of groundwater. 
 
GROUNDWATER ADVISORY 
Clopyralid is known to leach through soil into groundwater under certain conditions as a result of label 
use. This chemical may leach into groundwater if used in areas where soils are permeable, particularly 
where the water table is shallow. 
 
SURFACE WATER ADVISORY 
This product may impact surface water quality due to runoff of rain water. This is especially true for poorly 
draining soils and soils with shallow groundwater. This product is classified as having high potential for 
reaching surface water via runoff for several weeks after application. A level, well-maintained vegetative 
buffer strip between areas to which this product is applied and surface water features such as ponds, 
streams, and springs will reduce the potential loading of clopyralid from runoff water and sediment. Runoff 
of this product will be reduced by avoiding applications when rainfall or irrigation is expected to occur 
within 48 hours. 
 
NON-TARGET ORGANISM ADVISORY STATEMENT: This product is toxic to plants and may adversely 
impact the forage and habitat of non-target organisms, including pollinators, in areas adjacent to the 
treated site. Protect the forage and habitat of non-target organisms by following label directions intended 
to minimize spray drift. 
 
DIRECTIONS FOR USE 
It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Read entire 
label before using this product. 
 
Do not apply this product in a way that will contact workers or other persons, either directly or through 
drift. Only protected handlers may be in the area during application. For any requirements specific to your 
State or Tribe, consult the agency responsible for pesticide regulation. 
 
AGRICULTURAL USE REQUIREMENTS 
Use this product only in accordance with its labeling and with the Worker Protection Standard, 40 CFR 
part 170. This Standard contains requirements for the protection of agricultural workers on farms, 
forests, nurseries, and greenhouses, and handlers of agricultural pesticides. It contains requirements 
for training, decontamination, notification, and emergency assistance. It also contains specific 
instructions and exceptions pertaining to the statements on this label about personal protective 
equipment (PPE) and 
restricted-entry interval. The requirements in this box only apply to uses of this product that are 
covered by the Worker Protection Standard. 
 
Do not enter or allow worker entry into treated areas during the restricted entry interval (REI) of 48 
hours. 
 
PPE required for early entry to treated areas that is permitted under the Worker Protection Standard 
and that involves contact with anything that has been treated, such as plants, soil, or water, is: 
• Long-sleeved shirt and long pants 
• Socks and chemical resistant footwear

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 4 
 
• Chemical-resistant gloves made of Barrier Laminate, Nitrile Rubber ≥ 14 mils, Neoprene 
Rubber ≥ 14 mils or Viton ≥ 14 mils 
• Wear protective eyewear. 
• Wear chemical-resistant headgear for overhead exposure. 
 
Application Precautions 
• Do not apply when wind direction favors drift onto adjacent crops or desirable plants. 
• Field Bioassay Instructions: In fields previously treated with this product, plant short test rows of 
the intended rotational crop across the original direction of application in a manner to sample 
variability in field conditions such as soil texture, soil organic matter, soil pH, or drainage. The 
field bioassay can be initiated at any time between harvest of the treated crop and the planting of 
the intended rotational crop. Observe the test crop for herbicidal activity, such as poor stand 
(effect on seed germination) chlorosis (yellowing), and necrosis (dead leaves or shoots), or 
stunting (reduced growth). If herbicidal symptoms do not occur, the test crop can be grown. If 
there is apparent herbicidal activity, do not plant the field to the test rotational crop; plant only a 
labeled crop or crop listed in the table below for which the rotational interval has clearly been met. 
 
Application Restrictions 
• Use of this product in Oregon is limited to the sites stated on this label which are agricultural, 
forest, right-of-way, golf courses or cemetery sites. 
• Do not apply HM-1144 directly to, or allow spray drift to come in contact with broadleaf crops or 
other susceptible broadleaf plants, including, but not limited to, alfalfa, canola, beans, cotton, 
flowers, grapes, lettuce, lentils, mustard, peas, potatoes, radishes, soybeans, sugar beets, 
sunflowers, tobacco, tomatoes, vegetables, or other desirable broadleaf crops or ornamental 
plants or soil where sensitive crops will be planted the same season. 
• Do not contaminate irrigation ditches or water used for domestic purposes. 
• Do not apply this product using a backpack sprayer. 
• Chemigation: Do not apply this product through any type of irrigation system. 
• Do not transfer livestock from treated grazing areas (or feeding of treated hay) to sensitive 
broadleaf crop areas without first allowing 7 days of grazing on an untreated pasture (or feeding 
of treated hay). If livestock are transferred within less than 7 days of grazing untreated pasture or 
eating untreated hay, urine and manure may contain enough clopyralid to cause injury to 
sensitive broadleaf plants. 
• This product is persistent and may be present in treated plant materials for months to years after 
application. Do not sell or transport treated plant materials or manure from animals that have 
grazed on treated plant materials off-site for compost distribution or for use as animal 
bedding/feed for 18 months after application. Manure from animals that have grazed or eaten 
forage or hay harvested from treated areas within the previous three days may only be applied to 
the fields where the following crops will be grown: pasture grasses, grass grown for seed, wheat 
and corn. Animals that have been fed clopyralid-treated forage must be fed forage free of 
clopyralid for at least 3 days before movement to an area where manure may be collected or 
sensitive crops are grown.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 5 
 
 
 
For more information on how to manage clopyralid treated materials and to prevent clopyralid from 
contaminating compost please visit https://www.epa.gov/ingredients-used-pesticide-products/registration-
review-pyridine-and-pyrimidine-herbicides#compost 
 
MANDATORY SPRAY DRIFT MANAGEMENT 
 
Aerial Applications: 
• Do not release spray at a height greater than 10 ft above the ground or vegetative canopy, unless a 
greater application height is necessary for pilot safety. 
• Applicators are required to use a medium or coarser droplet size (ASABE S572 and S641). 
• If the windspeed is 10 miles per hour or less, applicators must use ½ swath displacement upwind at the 
downwind edge of the field. When the windspeed is between 11-15 miles per hour, applicators must use 
¾ swath displacement upwind at the downwind edge of the field. 
• Do not apply when wind speeds exceed 15 mph at the application site. If the windspeed is greater than 
10 mph, the boom length must be 65% or less of the wingspan for fixed-wing aircraft and 75% or less of

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 6 
 
the rotor diameter for helicopters. Otherwise, the boom length must be 75% or less of the wingspan for 
fixed-wing aircraft and 90% or less of the rotor diameter for helicopters 
• Do not apply during temperature inversions. 
 
Ground Boom Applications: 
• User must only apply with the release height recommended by the manufacturer, but no more than 4 
feet above the ground or crop canopy. 
• Applicators are required to select the nozzle and pressure that deliver a medium or coarser droplet size 
(ASABE S572). 
• Do not apply when wind speeds exceed 15 miles per hour at the application site. 
• Do not apply during temperature inversions. 
 
Boomless Ground Applications: 
• Applicators are required to select the nozzle and pressure that deliver a medium or coarser droplet size 
(ASABE S572) for all applications. 
• Do not apply when wind speeds exceed 15 miles per hour at the application site. 
• Do not apply during temperature inversions. 
 
SPRAY DRIFT ADVISORIES 
THE APPLICATOR IS RESPONSIBLE FOR AVOIDING OFF-SITE SPRAY DRIFT. 
BE AWARE OF NEARBY NON-TARGET SITES AND ENVIRONMENTAL CONDITIONS. 
 
IMPORTANCE OF DROPLET SIZE 
An effective way to reduce spray drift is to apply large droplets. Use the largest droplets that provide 
target pest control. While applying larger droplets will reduce spray drift, the potential for drift will be 
greater if applications are made improperly or under unfavorable environmental conditions. 
 
Controlling Droplet Size – Ground Boom 
• Volume - Increasing the spray volume so that larger droplets are produced will reduce spray drift. 
Use the highest practical spray volume for the application. If a greater spray volume is needed, 
consider using a nozzle with a higher flow rate. 
• Pressure - Use the lowest spray pressure recommended for the nozzle to produce the target 
spray volume and droplet size. 
• Spray Nozzle - Use a spray nozzle that is designed for the intended application. Consider using 
nozzles designed to reduce drift. 
 
Controlling Droplet Size – Aircraft 
Adjust Nozzles - Follow nozzle manufacturers’ recommendations for setting up nozzles. Generally, to 
reduce fine droplets, nozzles should be oriented parallel with the airflow in flight. 
 
BOOM HEIGHT – Ground Boom 
For ground equipment, the boom should remain level with the crop and have minimal bounce. 
 
RELEASE HEIGHT - Aircraft 
Higher release heights increase the potential for spray drift. 
 
SHIELDED SPRAYERS 
Shielding the boom or individual nozzles can reduce spray drift. Consider using shielded sprayers. Verify 
that the shields are not interfering with the uniform deposition of the spray on the target area. 
 
TEMPERATURE AND HUMIDITY 
When making applications in hot and dry conditions, use larger droplets to reduce effects of evaporation.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 7 
 
TEMPERATURE INVERSIONS 
Drift potential is high during a temperature inversion. Temperature inversions are characterized by 
increasing temperature with altitude and are common on nights with limited cloud cover and light to no 
wind. The presence of an inversion can be indicated by ground fog or by the movement of smoke from a 
ground source or an aircraft smoke generator. Smoke that layers and moves laterally in a concentrated 
cloud (under low wind conditions) indicates an inversion, while smoke that moves upward and rapidly 
dissipates indicates good vertical air mixing. Avoid applications during temperature inversions. 
 
WIND 
Drift potential generally increases with wind speed. Applicators need to be familiar with local wind 
patterns and terrain that could affect spray drift. 
 
Boomless Ground Applications: 
Setting nozzles at the lowest effective height will help to reduce the potential for spray drift. 
 
RESISTANCE-MANAGEMENT RECOMMENDATIONS 
For resistance management, HM-1144 is a Group 4 herbicide. Any weed population may contain or 
develop plants naturally resistant to HM-1144 and other Group 4 herbicides. The resistant biotypes may 
dominate the weed population if these herbicides are used repeatedly in the same field. Appropriate 
resistance management strategies should be followed. 
 
To delay herbicide resistance, take one or more of the following steps: 
• Rotate the use of HM-1144 or other Group 4 herbicides within a growing season sequence or 
among growing seasons with different herbicide 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 that will control the target weed(s) equally as well as the more resistance-prone 
partner. Consult your local extension service or certified crop advisor if you are unsure as to 
which active ingredient is currently less prone to resistance. 
 
• Adopt an integrated weed-management program for herbicide use that includes scouting and 
uses historical information related to herbicide use and crop rotation, and that considers tillage (or 
other mechanical control methods), cultural (e.g., higher crop seeding rates; precision fertilizer 
application method and timing to favor the crop and not the weeds), biological (weed-competitive 
crops or varieties) and other management practices. 
 
• Scout after herbicide application to monitor weed populations for early signs of resistance 
development. Indicators of possible herbicide resistance include: (1) failure to control a weed 
species normally controlled by the herbicide at the dose applied, especially if control is achieved 
on adjacent weeds; (2) a spreading patch of non-controlled plants of a particular weed species; 
(3) surviving plants mixed with controlled individuals of the same species. If resistance is 
suspected, prevent weed seed production in the affected area by an alternative herbicide from a 
different group or by a mechanical method such as hoeing or tillage. Prevent 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 after treatment with this product, discontinue use 
of this product, and switch to another management strategy or herbicide with a different mode of 
action, if available. 
 
• Contact your local extension specialist or certified crop advisors for additional pesticide 
resistance-management and/or integrated weed-management recommendations for specific 
crops and weed biotypes.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 8 
 
 
• For further information or to report suspected resistance, contact Helena Agri-Enterprises, LLC 
representatives at 901-761-0050. 
 
Fields should be scouted prior to application to identify the weed species present and their growth stage 
to determine if the intended application will be effective. 
 
Fields should be scouted after application to verify that the treatment was effective. 
 
Suspected herbicide-resistant weeds may be identified by these indicators: 
• Failure to control a weed species normally controlled by the herbicide at the dose applied, 
especially if control is achieved on adjacent weeds; 
• A spreading patch of non-controlled plants of a particular 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 
Helena Agri-Enterprises representative or call 901-761-0050. If resistance is suspected, treat weed 
escapes with an herbicide having a different mechanism of action 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 
practices, 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 seedbank. 
 
Prevent field-to-field and within-field movement of weed seed or vegetative propagules. Thoroughly clean 
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. The 
weed-control program should consider all of the weeds present. 
 
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 field. 
 
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 more 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-
chemical methods to remove escapes.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 9 
 
Crop Rotation Intervals 
Residues of HM-1144 in treated plant tissues, including the treated crop or weeds, which have not 
completely decayed may affect succeeding susceptible crops. 
 
Plantback Restrictions: Wheat, barley, oats, rye, flax and peas treated with MCPA may be replanted 
with any crop specified on an MCPA label or any crop for which a residue tolerance exists for MCPA. For 
crops not listed on an MCPA label, or on crops for which no residue tolerances for MCPA have been 
established, a 1-year plantback interval must be observed. 
Crop Rotation Intervals for All States except California, Idaho, Nevada, Oregon, Utah and 
Washington 
Note: Numbers in parenthesis and † refer to footnotes following tables. 
Rotation Crops (1) Rotation Interval † 
(Soils greater than 2% organic 
matter AND rainfall more than 
15 inches during 12 months 
following application) 
Rotation Interval † 
(Soils less than 2% organic 
matter AND rainfall less than 15 
inches during 12 months 
following application) 
barley, grasses, field com, oats, 
sweet com, wheat 
Anytime Anytime 
flax 120 days 120 days 
canola (rapeseed), cole crops 
(Brassica species), garden beet, 
popcorn, spinach, sugarbeet, 
turnip 
12 months 12 months 
alfalfa 10.5 months 10.5 months 
 asparagus, grain sorghum, 
mint, onions, safflower, 
strawberries 
12 months 
 
12 months 
 
dry beans, soybeans, 
sunflowers 
12 months 18 months 
lentils, peas, potatoes (including 
potatoes grown for seed), and 
broadleaf crops grown for seed 
(excluding Brassica species) 
18 months (2) 
 
18 months (2,3) 
 
1. A field bioassay is recommended prior to planting any broadleaf crops that are not listed. Do not rotate to 
unlisted crops prior to 12 months follow ing application. 
2. For rotation to field peas in 10.5 months, precipitation must be greater than 7.0 inches during the 10.5 
months follow ing application of HM-1144 and greater than 5.5 inches during the June 1 to August 31 time 
period follow ing application. Otherw ise rotation to field peas is recommended 18 months follow ing 
application. 
3. A field bioassay is also recommended prior to planting these sensitive crops. See instructions above. 
† The above intervals are based on average annual precipitation, regardless of irrigation practices. 
Observance of crop rotation intervals should result in adequate safety to rotational crops. 
However, HM-1144 is dissipated in the soil by microbial activity and the rate of microbial activity is 
dependent on several interrelating factors including soil moisture, temperature and organic 
matter. Therefore, accurate prediction of rotational crop safety is not possible. In areas of low 
organic matter <2.0%) and less than 15 inches average annual precipitation, potential for crop 
injury may be reduced by burning or removal of plant residues, supplemental fall irrigation and 
deep moldboard plowing prior to planting the sensitive crop.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 10 
 
Crop Rotation Intervals for California, Idaho, Nevada, Oregon, Utah and Washington Only 
Rotation Crops (1) Rotation Interval † 
(Areas receiving greater than 18 
inches of rainfall – not including 
irrigation) 
Rotation Interval † 
(Areas receiving less than 18 
inches of rainfall – not including 
irrigation) 
barley, grasses, field com, oats, 
sweet com, wheat 
Anytime Anytime 
flax 120 days 120 days 
canola (rapeseed), cole crops 
(includes Brassica species 
grown for seed), garden beet, 
popcorn, spinach, sugarbeet, 
turnip 
12 months 12 months 
asparagus, grain sorghum, mint, 
onions, safflower, strawberries 
12 months 
 
12 months 
 
Alfalfa, dry beans, soybeans, 
sunflower 
12 months 18 months (2,3) 
broadleaf crops grown for seed 
(excluding Brassica species), 
carrots (2), celery (2), cotton 
(2), lentils, lettuce (2), melons 
(2), peas, potatoes (including 
potatoes grown for seed), 
safflower, and tomatoes (2) 
18 months (2) 
 
18 months (2,3) 
 
 
1. A field bioassay is recommended prior to planting any broadleaf crops that are not listed. Do not rotate to 
unlisted crops prior to 12 months follow ing application. 
2. An 18-month crop rotation is recommended due to the potential for crop injury. Note: For these crops, a 
minimu m 12-month rotation interval must be observed to avoid illegal r esidues in the harvested crop. 
3. Crop injury and/or yield loss may occur up to 4 years after application. A field bioassay is also recommended 
prior to planting these sensitive crops. See instructions above. 
† The above intervals are based on average annual precipitation, regardless of irrigation practices. 
Observance of crop rotation intervals should result in adequate safety to rotational crops. 
However, HM-1144 is dissipated in the soil by microbial activity and the rate of microbial activity is 
dependent on several interrelating factors including soil moisture, temperature and organic 
matter. Therefore, accurate prediction of rotational crop safety is not possible. In areas of low 
organic matter <2.0%) and less than 15 inches average annual precipitation, potential for crop 
injury may be reduced by burning or removal of plant residues, supplemental fall irrigation and 
deep moldboard plowing prior to planting the sensitive crop. 
 
Avoiding Injury to Non-Target Plants: This product can affect susceptible broadleaf plants directly 
through foliage and indirectly by root uptake from treated soil. Do not apply HM-1144 herbicide directly to, 
or allow spray drift to come in contact with broad leaf crops, including, but not limited to alfalfa, canola, 
beans, cotton, flowers, grapes, lettuce, lentils, mustard, peas, potatoes, radishes, soybeans, sugar beets, 
sunflowers, tobacco, tomatoes, vegetables, or other desirable broadleaf crops or ornamental plants or soil 
where sensitive crops will be planted the same season. (See guidance in section entitled "Crop Rotation 
Intervals".) 
 
Residues in Plants or Manure: Do not use plant residues, including hay or straw from treated areas, or 
manure or bedding straw from animals that have grazed or consumed forage from treated areas, for 
composting or mulching, where susceptible plants may be grown the following season. Do not spread 
manure from animals that have grazed or consumed forage or hay from treated areas on land used for 
growing susceptible broadleaf crops. To promote herbicidal decomposition, plant residues should be

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 11 
 
evenly incorporated or burned. Breakdown of clopyralid in crop residues or manure is more rapid under 
warm, moist soil conditions and may be enhanced by supplemental irrigation. 
 
Avoid Movement of Treated Soil: Avoid conditions under which soil from treated areas may be moved 
or blown to areas containing susceptible plants. Wind-blown dust containing clopyralid may produce 
visible symptoms, such as epinasty (downward curving or twisting of leaf petioles or stems) when 
deposited on susceptible plants; however, serious injury is unlikely. To minimize potential movement of 
clopyralid on wind-blown dust, avoid treatment of powdery dry or light sandy soils until soil has been 
settled by rainfall or irrigation or irrigate shortly after application. 
 
Sprayer Clean-Out: To avoid injury to desirable plants, equipment used to apply HM-1144 should be 
thoroughly cleaned before re-using to apply any other chemicals. 
1. Rinse and flush application equipment thoroughly at least 3 times with water after use. Dispose of 
rinse water by application to treatment area or in non-cropland area away from water supplies. 
2. During the second rinse, add 1 qt of household ammonia for every 25 gallons of water. Circulate 
the solution through the entire system so that all internal surfaces are contacted (15-20 minutes). 
Let the solution stand for several hours, preferably overnight. 
3. Flush the solution out of the spray tank through the boom. 
4. Rinse the system twice with clean water, recirculating and draining each time. 
5. Remove nozzles and screens and clean separately. 
 
Mixing Instructions 
1. Fill spray tank with water equal to ½ to ¾ of the required spray volume and start agitation. 
2. Add the required amount of HM-1144. 
3. Add any surfactants, adjuvants or drift control agents according to manufacturer's label. 
4. Agitate during final filling of the spray tank and maintain sufficient agitation during application to 
ensure uniformity of the spray mixture. 
Note: Allow time for thorough mixing of each spray ingredient before adding the next. If allowed to stand 
after mixing, agitate spray mixture before use. 
 
It is the pesticide user’s responsibility to ensure that all products in the listed mixtures are 
registered for the intended use. Users must follow the most restrictive directions for use and 
precautionary statements of each product in the tank mixture. 
 
Tank Mixing: This product may be applied in tank mix combination with labeled rates of other products 
provided (1) the tank mix product is labeled for the timing and method of application for the use site to be 
treated; and (2) tank mixing with products containing MCPA, fluroxypyr or clopyralid is not prohibited by 
the label of the tank mix product. When tank mixing, do not exceed labeled application rates and use only 
in accordance with the most restrictive precautions and limitations on the respective product labels. 
 
Tank Mixing Precautions: 
• Read carefully and follow all applicable use directions, precautions, and limitations on the 
respective product labels. 
• Always perform a (jar) test to ensure the compatibility of products to be used in tank mixture. 
 
Tank Mixing Restrictions: 
• Do not exceed listed application rates. Do not tank mix with another pesticide product that 
contains the same active ingredient as this product unless the label of either tank mix partner 
specifies the maximum dosages that may be applied. 
• For products packaged in water soluble packaging, do not tank mix with products containing 
boron or mix in equipment previously used to apply a product mixture containing boron unless the 
tank and spray equipment has been adequately cleaned. (See instructions for Sprayer Clean-
Out.)

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 12 
 
Tank Mix Compatibility Testing: A jar test is recommended prior to tank mixing to ensure compatibility 
of HM-1144 and other pesticides. Use a clear glass quart jar with lid and mix the tank mix ingredients in 
their relative proportions. Invert the jar containing the mixture several times and observe the mixture for 
approximately 1/2 hour. If the mixture balls-up, forms flakes, sludges, jells, oily films or layers, or other 
precipitates, it is not compatible and the tank mix combination should not be used. 
 
Tank Mixing Instructions: Fill spray tank with water to ½ to ¾ of the required spray volume. Start 
agitation. Add different formulation types in the order indicated, allowing time for complete mixing and 
dispersion after addition of each. 
1. Add dry flowables; wettable powders; aqueous suspensions, flowables or liquids. 
2. Maintain agitation and fill spray tank to ¾ of total spray volume and then add HM-1144 and other 
emulsifiable concentrates and any solutions. 
 
Finish filling the spray tank. Maintain continuous agitation during mixing, final filling and throughout 
application. If spraying and agitation must be stopped before the spray tank is empty, the materials may 
settle to the bottom. Settled materials must be resuspended before spraying is resumed. A sparger 
agitator is particularly useful for this purpose. Settled material may be more difficult to resuspend than 
when originally mixed. 
 
Application Directions 
WHEAT (including Durum), BARLEY, OATS 
Application Timing: Apply to actively growing weeds. Extreme growing conditions such as drought or 
near freezing temperatures prior to, at, or following application may reduce weed control and increase the 
risk of crop injury at all stages of growth. Only weeds that have emerged at the time of application will 
be controlled. If foliage is wet at the time of application, control may be decreased. Applications of HM-
1144 herbicide are rainfast within 6 hours after application. To obtain season-long control of perennial 
weeds such as Canada thistle, apply when the majority of the basal leaves have emerged from the soil up 
to bud stage. For suppression of volunteer potatoes, apply before potato plants are 6 inches tall. Do not 
apply HM-1144 after the crop has reached the F9 sta ge. Do not use if cereal crop is underseeded 
with a legume. 
 
Effect of Temperature on Herbicidal Activity: Herbicidal activity of HM-1144 is influenced by weather 
conditions. Optimum activity requires active plant growth. The temperature range for optimum herbicidal 
activity is 55°F to 75°F. Reduced activity will occur when temperatures are below 45°F or above 85°F. 
Frost before application (3 days) or shortly after (3 days) may reduce weed control and crop tolerance. 
 
Re strictions: 
Do not allow livestock to graze treated areas or harvest treated forage within 7 days of application. 
Do not apply more than 1.7 pints (0.566 lb ai MCPA, 0.141 lb ai fluroxypyr and 0.112 lb ai clopyralid) per 
acre of HM-1144 per year. 
 
Preharvest Interval: Do not apply closer than 14 days before cutting of hay or 40 days before harvesting 
of grain and straw. 
 
Application Rates: Generally, application rates at the lower end of the rate range will be satisfactory for 
young, succulent growth of susceptible weed species. For less sensitive species, perennials, and under 
conditions where control is more difficult (plant stress conditions such as drought or extreme 
temperatures, dense weed stands and/or larger weeds), the higher rates within the rate range will be 
needed. Weeds in fallow land or other areas where competition from crops is not present will generally 
require higher labeled rates for control or suppression.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 13 
 
 
Broadcast Application Rates: 
(Numbers in parentheses (-) refer to footnotes following table.) 
 
 
Weed Size, or Species (1) 
Application Rate 
(pt/acre) 
Maximum MCPA 
a.e. lbs/acre 
Based on 
Application 
Rate 
Susceptible broadleaf weed seedlings less than 4 
inches tall (2) 
 1.0 0.310 
Susceptible broadleaf weed seedlings less than 8 
inches tall or vining; dicamba tolerant kochia biotypes 
 1.0 – 1.5 0.46 
Volunteer potatoes 1.0 – 1.5 0.46 
 
1. See “Weeds Controlled or Suppressed" section for a complete listing of w eeds controlled or suppressed. 
2. A rate of 1.0 pints per acre w ill provide satisfactory control of kochia seedlings less than 4 inches tall 
(including ALS resistant biotypes). How ever, w hen conditions for control are less favorable, such as under 
drought or cool temperatures, a rate of up to 1.5 pints per acre w ill provide more consistent control of kochia 
seedlings 1 to 4 inches tall. Control of small kochia w ill be more consistent if kochia is at least 1 inch tall. A 
rate of 1.0 to 1.5 pints per acre should be used for optimal control of dicamba tolerant kochia populations 
(see "Management of Kochia Biotypes" in the "Broadl eaf Weeds Controlled" section above). 
 
Spray Coverage: Use sufficient spray volume to provide thorough coverage and a uniform spray pattern. 
Do not broadcast apply in less than 3 gallons of total spray volume per acre. For best results and to 
minimize spray drift, apply in a spray volume of 10 gallons or more per acre. As vegetative canopy and 
weed density increase, spray volume should be increased to obtain equivalent weed control. Use only 
nozzle types and spray equipment designed for herbicide application. To reduce spray drift, follow 
precautions under "Avoiding Injury to Non-Target Plants." 
 
Adjuvants: Generally, this product does not require the use of an adjuvant to achieve satisfactory weed 
control. However, the addition of an adjuvant may optimize herbicidal activity when applications are made 
(a) at lower use rates or lower carrier volumes, (b) under conditions of cool temperature, low relative 
humidity or drought, or (c) to small, heavily pubescent kochia. 
 
Use with Sprayable Liquid Fertilizer Solutions: HM-1144 is compatible with most non-pressurized 
liquid fertilizer solutions; however, if liquid fertilizer solutions are to be applied with HM-1144, a 
compatibility test (jar test) should be made prior to mixing. Jar tests are particularly important when a new 
batch of fertilizer or pesticide is used, when the water source changes, or when tank mixture ingredients 
or concentrations are changed. A compatibility test is performed by mixing the spray components (in the 
desired order and proportions) into a clear glass jar before mixing in the spray tank. Use of a compatibility 
aid such as Blendex may help obtain and maintain a uniform spray solution during mixing and application. 
Agitation in the spray tank must be vigorous to compare with jar test agitation. For best results, liquid 
fertilizer should not exceed 50% of the total spray volume. Premix HM-1144 with water and add to the 
liquid fertilizer/water mixture while agitating contents of the spray tank. Apply the spray the same day it is 
prepared while maintaining continuous agitation. 
 
Advisory: Foliar-applied liquid fertilizers, used as a carrier for HM-1144, can cause yellowing or leaf burn 
of crop foliage.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 14 
 
 
Broadleaf Weeds Controlled or Suppressed 
 Note: Numbers in parentheses (-) refer to footnotes below. 
Weeds Controlled Weeds Suppressed † 
alfalfa, volunteer (from seed) 
artichoke, Jerusalem (1) 
beans, volunteer 
bedstraw (cleavers) (2) 
bindw eed (seedling) 
buckw heat, w ild (3) 
burcucumber 
burdock, common 
buttercup 
canola (volunteer) 
chamomile, false 
chamomile, mayw eed (dogfennel) 
chickw eed 
clover, black medic 
clover, hop 
clover, red 
clover, sw eet 
clover, w hite 
cocklebur, common (1) 
coffeew eed 
cornflow er (bachelor button) 
cress, hoary 
croton 
daisy, oxeye 
dandelion (perennial & seedling) 
dock, seedling 
flixw eed 
flax, volunteer 
fleabane, hairy 
galinsoga 
grape species 
groundcherry 
groundsel, common 
haw ksbeard, narrow leaf 
haw kw eed, orange 
haw kw eed, yellow 
hemp dogbane 
horsew eed 
jimsonw eed (1) 
knapw eed, difuse 
knapw eed, spotted 
knotw eed 
kochia (4) 
lambsquarters 
lentils, volunteer 
lettuce, prickly 
locow eed, Lambert 
locow eed, w hite 
London rocket 
mallow , common 
mallow , Venice 
marshelder (1) 
morningglory 
mustard species 
nettle, burning 
nightshade, black (5) 
nightshade, cutleaf (5) 
nightshade, hairy (5) 
peas, volunteer 
pennycress, field 
pigw eed 
pineapplew eed 
plantain, buckhorn (seedling) 
puncturevine 
purslane, common 
ragw eed, common (1) 
ragw eed, giant (1) 
salsify, meadow (goatsbeard) 
shepherds-purse 
sicklepod 
sorrel, red 
sow thistle, annual & perennial 
starthistle, yellow 
sunflow er (1) 
teasel, common 
thistle, bull 
thistle, Canada (6) 
thistle, musk 
velvetleaf 
vetch 
w hitebush 
w ild carrot 
w ild radish 
alfalfa, volunteer (from 
perennial plants) 
buffalobur (5) 
canola, volunteer 
Chinese thornapple 
devilsclaw 
dock, (perennial) 
fiddleneck 
field horsetail 
filaree 
knapw eed, Russian 
knotw eed 
ladysthumb (5) 
malv a 
marestail 
oxalis 
plantain, buckhorn 
(perennial) 
potato, volunteer 
smartw eed 
smartw eed, ladysthumb (5) 
spurge, prostrate 
thistle, Russian 
w ormw ood, biennial 
 
 
 
 
† Suppression is expressed as a reduction in w eed competition (reduction population or vigor) as compared to 
untreated areas. The degree of w eed control and duration of effect may vary w ith w eed size, density, 
application rate, coverage, and grow ing conditions before, during and after treatment. 
1. For best control, apply up to 5 leaf stage of grow t h. 
2. For best control, apply in the 1 - 4 leaf "w horl" stage of grow th. 
3. For best control, apply in the 1 - 3 leaf stage of grow th, before vining. 
4. Includes herbicide tolerant or resistant biotypes. Best control is achieved w hen w eeds are at least 1 inch tall. 
5. For best control or suppression, apply at the 2 - 4 leaf stage of grow th. 
6. For best control or suppression, apply from rosette to bud (pre- flow er) stage of growth. 
 
Perennial weeds: HM-1144 will control the initial top growth and inhibit regrowth during the season of 
application (season-long control). At higher use rates shown on this label, HM-1144 may cause a 
reduction in shoot regrowth in the season following application; however, plant response may be 
inconsistent due to inherent variability in shoot regrowth from perennial root systems. 
 
Management of Kochia Biotypes: Research has suggested that many biotypes of kochia can occur 
within a single field. While kochia biotypes can vary in their susceptibility to HM-1144, all will be 
suppressed or controlled by the 1.0 pint per acre labeled rate. Application of HM-1144 at rates below the 
1.0 pint per acre rate can result in a shift to more tolerant biotypes within a field. 
 
Best Resistance Management Practices: Extensive populations of dicamba tolerant kochia have been 
identified in certain small grain production regions (such as Chouteau, Fergus, Liberty, Toole, and 
Treasure counties in the state of Montana). For optimal control of dicamba tolerant kochia in these 
counties, apply HM-1144 at a minimum rate of 1.0 pints (0.333 lb ai MCPA, 0.0.083 lb ai fluroxypyr and 
0.066 lb ai clopyralid) per acre. In addition, use of HM-1144 should be rotated with products that do not

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 15 
 
contain dicamba to minimize selection pressure. Use of these practices will preserve the utility of HM-
1144 for control of dicamba tolerant kochia biotypes. 
 
Spot Treatments: To prevent misapplication, it is recommended that spot treatments be applied only with 
a calibrated boom or with hand sprayers according to directions provided below. 
 
Hand-Held Sprayers: Hand-held sprayers may be used for spot applications. Care should be taken to 
apply the spray uniformly and at a rate equivalent to a broadcast application. Application rates in the table 
are based on an area of 1,000 sq ft. Mix the amount of HM-1144 (fl oz or ml) corresponding to the desired 
broadcast rate in 10 or more gallons of spray. To calculate the amount of HM-1144 required for larger 
areas, multiply the table value (fl oz or ml) by the area to be treated in "thousands" of square feet, e.g., if 
the area to be treated is 3,500 sq ft, multiply the table value by 3.5 (calc. 3,500 ÷ 1,000 = 3.5). An area of 
1000 sq ft is approximately 10.5 x 10.5 yards (strides) in size. 
 
1 fl oz = 29.6 (30) ml 
 
Amount per gallon of spray to Equal Specified Broadcast Rate 
 1.0 pt/acre 1.5 pt/acre 
 0.43 fl oz 
(11 ml) 
 0.56 fl oz 
(16 ml) 
 
SELECTIVE SPRAYING 
NOTE - When using on grains - do not forage or graze dairy and meat animals on treated areas within 
seven days of slaughter. Also, except for small underseeded grains, use at least 10 gallons of water per 
acre for ground application and at least 1 to 5 gallons of water per acre for aerial application. 
 
GRASSES GROWN FOR SEED 
 Use ½ to 1.0 pints per acre in 1 to 50 gallons of water by air or ground sprayer application. Use higher 
labeled rate where weed stands are heavy. In established grasses, apply in Spring before head comes 
into boot stage and on seedling grass after grass has tillered. 
 
Application timing: Apply to established grasses in the spring from the tiller stage prior to early boot 
stage. New grass seed plantings may be treed from the 2 true leaf stage to just before early boot stage of 
growth. Applications in the boot stage and beyond can result in increased potential for injury. Do not apply 
to bentgrass unless injury can be tolerated. Apply when weeds are actively growing, but before weeds are 
4 inches tail or vining. For control of late-emerging Canada thistle or kochia, a preharvest treatment may 
be made after grass seed is fully developed. Treatment of Canada thistle at the bud stage or later, or 
treatment of kochia greater than 8 inches tell may result in less consistent control. Post-harvest 
treatments in the fall may be made to actively growing Canada thistle after the majority of basal leaves 
have emerged. 
 
RESTRICTIONS 
• Do not apply more than 2 pints (0.666 lb ai MCPA, 0.166 lb ai fluroxypyr and 0.132 lb ai 
clopyralid) per acre per year. 
• Do not apply more than 2 applications per year 
• Minimum retreatment interval of 21 days. 
• Grazing restrictions: There are no grazing restrictions for lactating or non-lactating dairy 
animals. 
• Ha rve st re strictions: Do not harvest grass for hay or silage from treated areas within 7 days of 
application. 
• Slaughter restrictions: Meat animals must be withdrawn from treated forage at least 2 days 
before slaughter.

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 16 
 
NOTE: For weed control in grasses, a second treatment may be needed for less susceptible weeds. 
White clover and other legumes may be temporarily injured or killed. In some areas, bent, buffalo, carpet, 
centipede, dichondra and St. Augustine may also be injured by the treatment. 
 
NON-CROP USES 
Rights-of-way, roadsides, highways, industrial sites, fence rows, non-irrigation ditch banks, 
recreational areas and similar non-crop areas: For control of broadleaf weeds, mix at a rate of 1 ⅔ to 3 
pints of this product per acre in adequate water to thoroughly saturate all weeds with spray mixture. This 
may require a spray volume of 20 to 80 gallons of water per acre. Apply any time between the time when 
plants come into full leaf (spring) to when the plants begin to go dormant. Best results are obtained when 
weeds are young and actively growing. Do not cut weeds until herbicide has translocated throughout the 
plant causing root death. For small broad leaf weeds, use the lower rate. Heavy, dense stands require the 
higher labeled rate with high water volume. For small (spot) applications with small tank sprayers, apply at 
the rate of 2.0 fluid ounces of this product per gallon of water and spray to thoroughly wet all foliage. 
 
For control of woody plants: Apply to both stems and foliage any time from the time foliage is 
completely matured until the time plants start to go dormant. All leaves, stems and suckers must be 
completely wet to the ground line for effective control. Regrowth may be anticipated on the more 
resistant species. Add 2.4 to 3 pints of this product per acre in adequate water to thoroughly saturate all 
weeds with the spray mixture. This may require a spray volume of 20 to 80 gallons of water per acre 
depending upon the height and thickness of the brush. Mix thoroughly before spraying. 
 
RESTRICTIONS AND LIMITATIONS 
• In non-cropland areas (including rights-of-way), this product may be applied aerially only by 
helicopter. Do NOT apply this product to non-cropland areas using fixed-wing aircraft. This 
product may be applied to rangeland, permanent pastures and pine plantations using either fixed 
wing aircraft or helicopter equipment Nozzles must always point backward parallel with the air 
stream and never be pointed downwards more than 45 degrees. 
• Do NOT apply this product in or around greenhouses. 
• Do not use hay or straw from treated areas for composting or mulching on susceptible broadleaf 
crops. 
• Do not apply more than 2 applications per year with a minimum retreatment interval of 21 days. 
• On fallow land do not plant any crop until 3 months after treatment or until MCPA has dispersed 
from soil. 
• Do not apply more than 3 pints of HM-1144 (1 lb ai MCPA, 0.25 lb ai fluroxypyr and 0.2 lb ai 
clopyralid) per acre per year. 
• For annual and perennial weeds, the maximum rate per application is 3 pints (1 lb ai MCPA, 0.25 
lb ai fluroxypyr and 0.2 lb ai clopyralid) per acre, limited to 1 application per year. 
• For woody plants, the maximum rate per application is 3 pints (1 lb ai MCPA, 0.25 lb ai fluroxypyr 
and 0.2 lb ai clopyralid) per acre, limited to 1 application per year. 
• Applications to non-cropland areas are not applicable to treatment of commercial timber or other 
plants being grown for sale or other commercial use, or for commercial seed production, or for 
research purposes. 
 
 
STORAGE AND DISPOSAL 
PESTICIDE STORAGE: Always store pesticides in a secured warehouse or storage building. 
Containers should be opened in well ventilated areas. Keep container tightly sealed when not in use. 
Do not stack cardboard cases more than two pallets high. Do not store near open containers of 
fertilizer, seed or other pesticides. Do not contaminate water, food or feed by storage or disposal. 
 
PESTICIDE DISPOSAL: Wastes resulting from the use of this product may be disposed of on site or at 
an approved waste disposal facility. If container is damaged or if pesticide has leaked, contain all

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 17 
 
spillage. Absorb and clean up all spilled material with granules or sand. Place in a closed labeled 
container for proper disposal. 
 
CONTAINER DISPOSAL: Nonrefillable container: Do not reuse this container to hold materials other 
than pesticides or dilute pesticides (rinsate). After emptying and cleaning, it may be allowable to 
temporarily hold rinsate or other pesticide-related materials in the container. Contact your state 
regulatory agency to determine allowable practices in your state. Once cleaned, some agricultural 
plastic pesticide containers can be taken to a container collection site or picked up for recycling. To find 
the nearest site, contact your chemical dealer or manufacturer, or contact The Agricultural Container 
Recycling Council (ACRC) at www.acrecycle.org
. Triple rinse or pressure rinse container (or 
equivalent) promptly after emptying. 
 
For packages up to 5 gallons. Triple rinse as follows: Empty the remaining contents into application 
equipment or a mix tank and drain for 10 seconds after the flow begins to drip. Fill the container 1/4 full 
with water and recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or 
store rinsate for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this 
procedure two more times. Pressure rinse as follows: Empty the remaining contents into application 
equipment or a mix tank and continue to drain for 10 seconds after the flow begins to drip. Hold 
container upside down over application equipment or mix tank or collect rinsate for later use or 
disposal. Insert pressure rinsing nozzle in the side of the container, and rinse at about 40 PSI for at 
least 30 seconds. Drain for 10 seconds after the flow begins to drip. 
 
For packages greater than 5 gallons and less than 56 gallons: Triple rinse as follows: Empty the 
remaining contents into application equipment or a mix tank. Fill the container 1/4 full with water. 
Replace and tighten closures. Tip container on its side and roll it back and forth, ensuring at least one 
complete revolution, for 30 seconds. Stand the container on its end and tip it back and forth several 
times. Empty the rinsate into application equipment or a mix tank or store rinsate for later use or 
disposal. Repeat this procedure two more times. Pressure rinse as follows: Empty the remaining 
contents into application equipment or a mix tank and continue to drain for 10 seconds after the flow 
begins to drip. Hold container upside down over application equipment or mix tank or collect rinsate for 
later use or disposal. Insert pressure rinsing nozzle in the side of the container, and rinse at about 40 
PSI for at least 30 seconds. Drain for 10 seconds after the flow begins to drip. 
 
For packages greater than 56 gallons: To clean the container before final disposal, empty the 
remaining contents from this container into application equipment or mix tank. Fill the container about 
10 percent full with water. Agitate vigorously or recirculate water with the pump for 2 minutes. Pour or 
pump rinsate into application equipment or rinsate collection system. Repeat this rinsing procedure two 
more times. 
 
For refillable containers: 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 this container into application 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 collection system. 
Repeat this rinsing procedure two more times. 
 
For help with any spill, leak, fire or exposure involving this material, call day or night CHEMTREC 1-800-
424-9300

Filename: HM-1144 Herbicide (5905-590) 021825 CLN.doc 18 
 
CONDITIONS OF SALE - LIMITED WARRANTY 
AND LIMITATIONS OF LIABILITY AND REMEDIES 
 
Read the Conditions of Sale - Warranty and Limitations of Liability and Remedies before using this 
product. If the terms are not acceptable, return the product, unopened, and the full purchase price will be 
refunded. 
 
The directions on this label must be followed carefully. Insufficient control of pests and/or injury to the 
crop to which the product is applied may result from the occurrence of extraordinary or unusual weather 
conditions or the failure to follow the label directions or good application practices, all of which are beyond 
the control of Helena Agri-Enterprises, LLC (the "Company") or seller. In addition, failure to follow label 
directions may cause injury to crops, animals, man or the environment. The Company warrants that this 
product conforms to the chemical description on the label and is reasonably fit for the purpose referred to 
in the directions for use subject to the factors noted above which are beyond the control of the Company. 
To the extent consistent with applicable law, the Company makes no other warranties or representations 
of any kind, express or implied, concerning the product, including no implied warranty of merchantability 
or fitness for any particular purpose, and no such warranty shall be implied by law. 
 
To the extent consistent with applicable law, the exclusive remedy against the Company for any cause of 
action relating to the handling or use of this product shall be limited to, at Helena Agri-Enterprises, LLC’s 
election, one of the following: 
 
1. Refund of the purchase price paid by buyer or user for product bought, or 
2. Replacement of the product used 
 
To the extent allowed by law, the Company shall not be liable and any and all claims against the 
Company are waived for special, indirect, incidental, or consequential damages or expense of any nature, 
including, but not limited to, loss of profits or income. The Company and the seller offer this product and 
the buyer and user accept it, subject to the foregoing conditions of sale and limitation of warranty, liability 
and remedies. 
 
© Copyright Helena Holding Company, 2025.