2,4-D Amine 500

Manufacturer
Dow AgroSciences
Category
Herbicides
Registered until
2027-12-31
Registration number
9528
Active materials
Links

DIRECTIONS FOR USE

USE PRECAUTIONS

DO NOT apply this product directly to freshwater habitats such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs and wetlands, estuaries or marine habitats.
DO NOT contaminate irrigation/drinking water supplies or aquatic habitats by cleaning of equipment or disposal of wastes.

Field sprayer application
DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) coarse classification. Boom height must be 60 cm or less above the crop or ground.

Aerial application
DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply when wind speed is greater than 16 km/h at flying height at the site of application. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) coarse classification. To reduce drift caused by turbulent wingtip vortices, the nozzle distribution along the spray boom length MUST NOT exceed 65% of the wing- or rotorspan.

Restricted Entry Interval (REI)
 All crops—12-hour REI
 Corn (sweet)—14-day REI for hand harvesting.

Ground Application - Cropland
Apply 50 to 200 L of spray solution per hectare depending on the type of application equipment used.
Use sufficient water for even distribution. Spray at low pressures (200 to 275 kPa) when the weeds are actively growing.

Ground Application - Non Cropland
Apply 50 to 1000 L of spray solution per hectare depending on the type of application system being used.
Use sufficient water to ensure uniform coverage.

To Prepare a Spray
Add half the required amount of water to the spray tank, then the 2,4-D Amine 500 Herbicide with agitation, and finally the balance of the water with continued agitation.

Spot Treatment
For knapsack application of 2,4-D Amine 500 Herbicide for spot treatment of weeds such as thistles, mix 0.2 L of product in 10 L of water. Wet all foliage thoroughly. Maximum 2 applications per year.
Maximum Amount of Product Applied/day/person with Handheld Equipment: 5.8 L.

Selective Weed Control in Small Grains
Weeds differ in their susceptibility to 2,4-D Amine 500 Herbicide and not all types can be controlled satisfactorily in crops. The amount of 2,4-D Amine 500 Herbicide to use will depend upon the susceptibility and whether the crops will tolerate this amount. See Table 1. Maximum 1 application per year.

Wheat, Barley and Rye

Spray from the 3-leaf expanded stage (15 cm tall) to just before the flag-leaf (shot-blade) stage. To avoid crop injury, do not treat during boot and flowering stages. Winter wheats and fall rye should be treated in early spring, as soon as weeds appear and before the crop reaches the shot-blade stage.

Table 1 Suggested Amounts of 2,4-D Amine 500 Herbicide for Weed Control in Cereals (not underseeded to legumes)

Mixed Weedy Growth: Susceptible weeds such as: mustard (except dog and green tansy), bluebur, burdock, cocklebur, field horsetail, stinkweed, goatsbeard, prickly lettuce, hoary cress, kochia, lamb’s-quarters, plantain, ragweeds, Russian pigweed, shepherd’s purse, annual sunflower, sweet clover, vetch, wild radish
Stage of Weed Kind of Weather: Seedling (2-4 leaves), Growing rapidly
Amount L/ha: 700 mL
Hectares Treated/20 L: 28
Stage of Weed Kind of Weather: Weeds in bud, Dry, cool weather, Heavy infestation
Amount L/ha: 1.1
Hectares Treated/20 L: 18

Mixed Weedy Growth: Harder to kill weeds such as: biennial wormwood, dock, dandelion, dog mustard, field peppergrass, hairy galinsoga, hedge bindweed, lady’s thumb, oak leaf goosefoot, redroot pigweed, Russian thistle, smartweed, annual sowthistle, tansy, Tartary buckwheat, tumbleweed, blue lettuce (1), Canada thistle (1), field bindweed (1), leafy spurge (1), perennial sow-thistle (1)
Stage of Weed Kind of Weather: Seedling (2-4 leaves),Growing rapidly
Amount L/ha: 1.25 (2)
Hectares Treated/20 L: 16
Stage of Weed Kind of Weather: Weeds in bud, Dry or cool weather, Heavy infestation
Amount L/ha: 1.75 (2)
Hectares Treated/20 L: 11

(1) Top growth control only.
(2) The higher rates may cause deformities and delayed maturity which will be offset by a higher relative yield from a less weedy crop.

Pre-Harvest Intervals
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.

Corn
Maximum 1 application per year.
Emergence Use 1.27 L/ha 2,4-D Amine 500 Herbicide between first emergence and when corn plants are 15 cm tall.
Postemergence - Treat with 0.5 to 1.1 L/ha when corn plants are 15 to 20 cm tall and most weeds have germinated but are still in seedling stage. Use drop nozzles to keep spray off corn foliage. Do not cultivate until at least 2 weeks after treatment.

Pre-Harvest Intervals
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest as forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.

Asparagus
Treat asparagus with 2,4-D Amine 500 Herbicide following a cultivation just before the first spears appear. Use 3.5 L/ha. Treatment may be repeated at end of cutting season.

Established Grasses - Eastern Canada
For the control of yellow rocket and other susceptible winter annual weeds, spray with 2.0 L/ha of 2,4-D Amine 500 Herbicide . Application should be made in early fall.

Pre-Harvest Intervals
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.

Established Pastures and Rangeland - Western Canada
To control susceptible perennials or winter annuals, spray with 2,4-D Amine 500 Herbicide at 1.1 to 2.0 L/ha before growth of legumes and grasses start in the spring. Maximum 2 applications per year.

Pre-Harvest Intervals
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.

BROADCAST AERIAL APPLICATION

Directions for Use
Apply only by fixed-wing or rotary aircraft equipment which has been functionally and operationally calibrated for the atmospheric conditions of the area and the application rates and conditions of this label.
Label rates, conditions and precautions are product specific. Read and understand the entire label before opening this product. Apply only at the rate recommended for aerial application on this label. Where no rate for aerial application appears for the specific use, this product cannot be applied by any type of aerial equipment.
Ensure uniform application. To avoid streaked, uneven or overlapped application, use appropriate marking devices

Use Precautions
Apply only when meteorological conditions at the treatment site allow for complete and even crop coverage. Apply only under conditions of good practice specific to aerial application as outlined in the National Aerial Pesticide Application Manual, developed by the Federal/Provincial/Territorial Committee on Pest Management and Pesticides.
Do not apply to any body of water. Avoid drifting of spray onto any body of water or other non-target areas. Specified buffer zones should be observed.
Coarse sprays are less likely to drift, therefore, avoid combinations of pressure and nozzle type that will result in fine particles (mist). Do not apply during periods of dead calm or when wind velocity and direction pose a risk of spray drift. Do not spray when the wind is blowing towards a nearby sensitive crop, garden, terrestrial habitat (such as shelter-belt) or aquatic habitat.

Operator Precautions
Do not allow the pilot to mix chemicals to be loaded onto the aircraft. Loading of premixed chemicals with a closed system is permitted.
It is desirable that the pilot have communication capabilities at each treatment site at the time of application. The field crew and the mixer/loaders must wear chemical resistant gloves, coveralls and goggles or face shield during mixing/loading, cleanup and repair. Follow the more stringent label precautions in cases where the operator precautions exceed the generic label recommendations on the existing ground boom label.
All personnel on the job site must wash hands and face thoroughly before eating and drinking. Protective clothing, aircraft cockpit and vehicle cabs must be decontaminated regularly.

Product Specific Precautions
Read and understand the entire label before opening this product. If you have questions, call the manufacturer at 1-800-667-3852 or obtain technical advice from the distributor or your provincial agricultural representative. Application of this specific product must meet and/or conform to the following use precautions.

USE PRECAUTIONS FOR AERIAL APPLICATIONS (to cereal crops, corn, pasture, rangeland and non-crop land)
DO NOT apply when wind speed is greater than 16 kmph at flying height at the site of application. Do not spray in dead calm near sensitive plants. The “cloud” of suspended droplets may drift onto sensitive plants when the wind comes up. Spray only when wind is blowing away from a sensitive crop, shelterbelt or garden.
Fixed and rotary-winged aerial applications to field crops should be made in a minimum of 30 L/ha total spray mixture. Use boom pressure of 235 kPa or less. Avoid placing nozzles where spray will enter wing tip vortices.
Do not use human flaggers.
Avoid Spray Drift: Apply only when there is little or no hazard from spray drift. Small quantities of the spray, which may not be visible, may seriously injure susceptible crops and damage sensitive nontarget habitat. A method must be used to detect air movement, lapse conditions or temperature inversions (stable air) such as the use of balloons or a continuous smoke column at or near the spray site or a smoke generator on the spray equipment. If the smoke develops into layers or indicates a potential for hazardous spray drift, do not spray.
Buffer Zones: Appropriate buffer zones should be established between treatment areas and aquatic systems and treatment areas and significant wildlife habitat.

Sensitive Plants
Vegetables, flowers, grapes, fruit trees and other desirable plants are sensitive to 2,4-D, even in minute quantities. Care should be taken to avoid spraying these types of plants or allowing spray mist to drift onto these plants during both their growing and dormant periods. Coarse sprays are less likely to drift. At higher temperatures, vaporization may cause injury to susceptible plants growing nearby.
This product may cause damage to lawns or pastures if applied before the grass is well established. In addition, most legumes may be damaged or killed.

BUFFER ZONES TO PROTECT SENSITIVE HABITATS
Buffer zones are not required for applications with handheld equipment and for spot treatment.
The buffer zones specified in the table below are required between the point of direct application and the closest downwind edge of sensitive terrestrial habitats (such as grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrublands), sensitive freshwater habitats (such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs and wetlands) and estuarine/marine habitats.
Seasonal water bodies require zones if there is water I them during application. Water bodies which do not fill on an annual basis need not be buffered.
For application to rights-of-way, buffer zones for protection of sensitive terrestrial habitats are not required; however, the best available application strategies which minimize off-site drift, including meteorological conditions (e.g., wind direction, low wind speed) and spray equipment (e.g., coarse droplet sizes, minimizing height above canopy), should be used. Applicators must, however, observe the specified buffer zones for protection of sensitive aquatic habitats.

Buffer Zone Table
Method of application: Field sprayer

Crop: Turf

Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 1

Crop:Pastures, rangeland, noncropland (including rights-ofway (1))
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 2

Method of application: Aerial

Crop: Pastures, rangeland (Fixed wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 60
Crop: Pastures, rangeland (Rotary wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 50

Crop: Noncropland (including rights-ofway (1)) 4.8 L/ha (Fixed wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 150 (1)
Crop: Noncropland (including rights-ofway (1)) 4.8 L/ha (Rotary wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 80 (1)

Crop: Noncropland (including rights-ofway (1)) 9.5 L/ha (Fixed wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 2
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 2
Greater than 1 m: 0
Terrestrial habitat: 225 (1)
Crop: Noncropland (including rights-ofway (1)) 9.5 L/ha (Rotary wing)
Buffer Zones (metres) Required for the Protection of:
Freshwater Habitat of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Estuarine/Marine Habitats of Depths:
Less than 1 m: 1
Greater than 1 m: 0
Terrestrial habitat: 100 (1)
(1) For application to rights-of-way, buffer zones for protection of sensitive terrestrial habitats are not required.

NOTE: Applicators may recalculate a site-specific buffer zone by combining information on current weather conditions and spray configuration for the following applications: all airblast applications, and for field and aerial applications which specify the following droplet size category wording on the product label: ‘DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) [Fine or Medium or Coarse] classification.’ To access the Buffer Zone Calculator, please visit the

Pest Management Regulatory Agency web site.
When a tank mixture is used, consult the labels of the tank-mix partners and observe the largest (most restrictive) buffer zone of the products involved in the tank mixture.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, 2,4-D Amine 500 Herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to 2,4-D Amine 500 Herbicide and other Group 4 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance management strategies should be followed.
To delay herbicide resistance:
Where possible, rotate the use of 2,4-D Amine 500 Herbicide or other Group 4 herbicides with different herbicide groups that control the same weeds in a field.
Use tank mixtures with herbicides from a different group when such use is permitted.
Herbicide use should be based on an IPM program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical), cultural, biological and other chemical control practices.
Monitor treated weed populations for resistance development.
Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment and planting clean seed.
Contact your local extension specialist or certified crop advisors for any additional pesticide resistancemanagement and/or integrated weed-management recommendations for specific crops and weed biotypes.
For further information or to report suspected resistance, contact Dow AgroSciences Canada Inc. at 1- 800-667-3852 or at www.dowagro.ca.

NOTICE TO USER: This pest control product is to be used only in accordance with the directions on the label. It is an offence under the Pest Control Products Act to use this product in a way that is inconsistent with the directions on the label. The user assumes the risk to persons or property that arises from any such use of this product.

Registered for culturesRatePreharvest Interval
Pasture1.1 - 2 l30
Corn1.27 l30
Asparagus3.5 l30
Winter wheat0.7 - 1.75 l30
Spring wheat0.7 - 1.75 l30
Spring barley0.7 - 1.75 l30
Winter barley0.7 - 1.75 l30
Winter rye0.7 - 1.75 l30
Spring rye0.7 - 1.75 l30