Tordon 202C

Dow AgroSciences - herbicide



TRANSFER SYSTEM: Containers larger than 20 Litres: Use a transfer system that avoids open pouring when transferring the liquid concentrate from such containers into the spray tank.

For Spring Wheat and Barley not underseeded with a legume in the Prairie Provinces, including the Peace River Area of British Columbia: Tordon 202C Liquid Herbicide should be diluted with water and applied by ground sprayer at the 3 to 5-leaf stage of wheat and barley. Treatment beyond this stage may result in crop damage, especially to wheat. The more advanced the crop is and the more adverse the growing conditions, the more likely damage is to occur.
Apply 100 to 200 L/ha (10-20 gal/acre) of spray solution at pressures of 200-275 kPa (30-40 PSI) for uniform coverage. Use ground spray equipment only. Treat when weeds are young and growing actively. Maximum 1 application per year.
NOTE: The weeds may not die immediately after treatment. The weeds will slow and cease growth, therefore not competing with the crop growth nor interfering with harvest.

Rate of Application
Apply Tordon 202C Liquid Herbicide for weed control in wheat and barley crops at a rate of 2.0 L/ha.

For best results treat:
(a)when weed seedlings are in the 2 to 4 leaf stage and (b)when weeds are actively growing. If weeds are larger or not actively growing, control may be reduced.
For the control of alsike clover in timothy and bromegrass being grown for seed production in the Prairie Provinces, including the Peace River area of B.C.: Apply Tordon 202C Liquid Herbicide at the rate of 2.0 L/ha in 100-200 L/ha total spray solution. Do not apply more than once per growing season. Application of Tordon 202C Liquid Herbicide should be made prior to the shotblade stage of the crop. Applications of Tordon 202C Liquid Herbicide should not be made after August 1 in the year of seeding. Treatments made after this date may result in significant seed yield reductions in the year following treatment.



Pre-Harvest Intervals

Do not permit lactating dairy animals to graze fields within 14 days after application.
Do not harvest forage or cut hay within 30 days after application.
Withdraw meat animals from treated fields at least 14 days before slaughter.
Do not apply more than once per year.
DO NOT apply this product directly to freshwater habitats such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs, ditches and wetlands, estuaries or marine habitats.
DO NOT contaminate irrigation/drinking water supplies or aquatic habitats by cleaning of equipment or disposal of wastes.

Restricted Entry Interval (REI)

For agricultural uses: Do not enter or allow worker entry into treated areas during the restricted entry interval (REI) of 12 hours.
Grass grown for seed—2-day REI

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.

Spray Preparation

To prepare the spray mix only with water, add about half the desired amount of water in the spray tank, then with agitation, all the recommended amount of Tordon 202C Liquid Herbicide. Finally, with continued agitation, add the rest of the water.

Fields previously treated with Tordon 202C Liquid Herbicide may be seeded to rapeseed, (including canola) mustard, flax, wheat, oats, barley or may be summerfallowed. These crops are tolerant to residues of picloram remaining in the soil.

Certain desirable broadleaf crops can be damaged by small amounts of picloram, one of the active ingredients in Tordon 202C Liquid Herbicide, remaining in the soil. The rate of decomposition of picloram varies with soil organic matter, soil moisture, pH and texture, therefore fields previously treated with Tordon 202C Liquid Herbicide should not be planted to:
-alfalfa and sunflowers until at least the third growing season after the year of treatment;
-beans, lentils, peas, or potatoes until at least the fifth growing season after the year of treatment.
(See Application Precautions and Soil below.)
Growers of any specialty crops should consult a Dow AgroSciences agricultural representative (phone 1-800-667-3852) to obtain updated information concerning seeding specialty crops and to determine the sensitivity of crops not listed above.


Small amounts of picloram and 2,4-D can damage certain desirable broadleaf plants including but not limited to alfalfa , beans, beets, lentils, peas, potatoes, sugarbeets, sunflowers, tomatoes, other field or vegetable crops, flowers, fruit plants, ornamental and shade trees, if applied to them during either the growing or dormant period. Avoid application in the vicinity of sensitive crops and do not allow spray to drift and contact desirable plants. Use a low pressure (200-275 kPa) and a coarse spray to minimize spray drift. Avoid overdosing and overlapping spray swaths as injury to crops may result. Do not treat wheat or barley crops underseeded to a legume.
Avoid contamination of non-target land, surface and sub-surface water or irrigation ditches. Do not use Tordon 202C Liquid Herbicide in the following areas: standing or flowing water, the inner banks or bottoms of irrigation ditches, in areas where surface water can run off to adjacent croplands either planted in or to be planted to sensitive crops, where the product can leach into ground water or where it can contact desirable plants.

Tordon 202C Liquid Herbicide should not be mixed in the sprayer with other weed killers or any other pesticide.


Spray equipment used to apply Tordon 202C Liquid Herbicide should not be used to apply other pesticides to crops susceptible to Tordon 202C Liquid Herbicide. If it is necessary to do so, contact your Dow AgroSciences Farm Herbicide Dealer for detailed equipment clean-up procedures. (See Use Precautions on specialty/other crops -- restrictions).

Straw from fields treated with Tordon 202C Liquid Herbicide can be fed to livestock. Picloram residues that may exist in the straw will pass through the animal unchanged. If the straw is used for bedding or animal feed, return the manure to fields to be planted to grain crops, flax, or rapeseed and do not plant to sensitive crops until the time periods mentioned in SPECIALTY/OTHER CROPS -- RESTRICTIONS have passed. Do not permit meat animals being finished for slaughter nor dairy animals to forage or graze treated fields within two weeks of treatment. Do not use straw from treated crops for composting or mulching on susceptible broadleaf crops.

Soil treated with Tordon 202C Liquid Herbicide should not be moved to other areas nor should it be used to grow susceptible broadleaf plants unless an adequately sensitive bioassay test shows that no picloram is present. For details of the bioassay contact Dow AgroSciences Canada Inc. at 1-800-667-3852.


Seasonal water bodies require buffer zones if there is water in them during application. Water bodies which do not fill on an annual basis need not be buffered.
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.

For resistance management, Tordon 202C Liquid Herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to Tordon 202C Liquid 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 Tordon 202C Liquid 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 resistance-management 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

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.

Winter wheat
0 - 0
Registred norm
2 - 2
Preharvest Interval
Winter barley
0 - 0
Registred norm
2 - 2
Preharvest Interval
Spring wheat
0 - 0
Registred norm
2 - 2
Preharvest Interval
Spring barley
0 - 0
Registred norm
2 - 2
Preharvest Interval