Agrobase Canada
Formula 40 C Registration expired
Dow AgroSciences - Herbicide
28296

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. DO NOT detassel sweet corn by hand

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.

GROUND APPLICATION Crop Use
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-Crop Use
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 Formula 40C Herbicide with agitation
and finally the balance of the water with continued agitation.

Spot Treatment
For knapsack application of Formula 40C Herbicide for spot treatment of weeds such as thistles, mix
200 mL of product in 10 L of water. Wet all foliage thoroughly.
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 Formula 40C Herbicide and not all types can be controlled
satisfactorily in crops. The amount of Formula 40C Herbicide to use will depend upon the susceptibility
and whether the crop will tolerate this amount. See Table 1.

Wheat, Barley, 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 wheat and fall rye should be treated in
early spring as soon as weeds appear and before the crop reaches the shot-blade stage. Maximum 1
application per year.

Pre-harvest Intervals
Do not permit lactating dairy animals to graze fields within 7 days after application.
Do not harvest as forage 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 1.2 L Formula 40C Herbicide/ha between first emergence and when corn plants are 15 cm tall.
Postemergence: Treat with 500 mL 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 within 30 days after application.
Withdraw meat animals from treated fields at least 3 days before slaughter.

Asparagus Eastern Canada Only
Apply Formula 40C Herbicide early in the season, immediately after a thorough cutting or discing. The recommended crop rate is 2.75 L/ha. If emerging spears are contacted directly by spray or spray drift they may become distorted i.e., twisted. Spears emerging afterwards will be normal. Formula 40C Herbicide may also be applied 3 weeks after a post harvest discing with a spray directed to avoid the fern. Apply 2.0 to 2.75 L/ha in 50 to 200 L of water.

Established Pastures and Rangelands Eastern Canada
For the control of yellow rocket (before the 4 leaf stage), and other susceptible winter annual weeds such as common chickweed, common purslane, curled dock (before the 4 leaf stage), dog mustard, goosefoot, groundsel, hawkweed, heal-all, knotweed (before the 4 leaf stage), peppergrass, pineappleweed, prostrate pigweed, sheep sorrel, smartweed and velvet leaf. Spray with 2.0 L of Formula 40C Herbicide/ha. Application should be made in early fall. Use 100 to 200 L/ha of water. Maximum 2 applications per year.

Established Pastures and Rangelands Western Canada
To control susceptible perennials or winter annuals, spray with Formula 40C Herbicide at 1.1 to 2.0 L/ha
before growth of legumes and grasses starts 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.

USE PRECAUTIONS FOR AERIAL APPLICATION To Cereal Crops, Pastures, Rangeland And Non-Crop Land (vacant lots, on roadsides, along fencerows) (including fixed and rotary wing aircraft)
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. 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.
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.
Apply a minimum of 30 L of spray solution per hectare depending on the type of application system being used. Use boom pressures of 235 kPa or less. Avoid placing nozzles where spray will enter wing tip vortices.
Avoid direct applications to any body of water. Do not contaminate water through spray drift or by cleaning of equipment or disposal of wastes.
Fixed and rotary-winged aerial applications to field crops should be made in a minimum of 30 L/ha total spray mixture. Use boom pressures of 235 kPa or less. Avoid placing nozzles where spray will enter wing tip vortices.
Do not apply this product directly to or otherwise permit it to come into direct contact with desirable crops or other desirable broadleaved plants or non-target species and do not permit spray mists to drift onto them.
Coarse sprays are less likely to drift; use only nozzle or nozzle configuration which minimize the production of fine spray drops. Do not angle nozzles forward into the airstream and do not increase spray volume by increasing nozzle pressure. When spraying, avoid combination of pressure and nozzle type that will result in fine particles (mist) which are more likely to drift. A spray thickening agent or drift retardant may be used with this product to aid in reducing spray drift.
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 non-target 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 a 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.
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.

GENERAL WEED CONTROL
For taller weed growth such as in vacant lots, on roadsides and along fencerows, sufficient spray solution should be used to wet all foliage thoroughly. Use Formula 40C Herbicide at the rate of 4 L per hectare.
Maximum 2 applications per year. Deep-rooted perennial weeds such as bindweed and Canada thistle may require repeated applications as new growth appears.

BUFFER ZONES TO PROTECT SENSITIVE HABITATS
Use of the following spray methods or equipment DO NOT require a buffer zone: hand-held or backpack sprayer and spot treatment.
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.
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.

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.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, Formula 40C Herbicide is a Group 4 herbicide. Any weed population may contain or develop plants naturally resistant to Formula 40C 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 Formula 40C 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 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.

Effective
Crops
Winter wheat
BBCH
0 - 0
Registred norm
0.7 - 1.75
Preharvest Interval
30
Crops
Spring wheat
BBCH
0 - 0
Registred norm
0.7 - 1.75
Preharvest Interval
30
Crops
Spring barley
BBCH
0 - 0
Registred norm
0.7 - 1.75
Preharvest Interval
30
Crops
Winter barley
BBCH
0 - 0
Registred norm
0.7 - 1.75
Preharvest Interval
30
Crops
Winter rye
BBCH
0 - 0
Registred norm
0.7 - 1.75
Preharvest Interval
30
Crops
Spring rye
BBCH
0 - 0
Registred norm
0.7 - 1.75
Preharvest Interval
30
Crops
Corn, maize
BBCH
0 - 0
Registred norm
0.5 - 1.2
Preharvest Interval
30
Crops
Asparagus
BBCH
0 - 0
Registred norm
2.75 - 2.75
Preharvest Interval
30
Effective
Ball mustard
Ball mustard
Neslia paniculata ★★★
Black mustard
Black mustard
Brassica nigra ★★★
Calepina
Calepina
Calepina irregularis ★★★
Cocklebur
Cocklebur
Xanthium strumarium ★★★
Common burdock
Common burdock
Arctium minus ★★★
Common ragweed
Common ragweed
Ambrosia artemisiifolia ★★★
European stickseed
European stickseed
Lappula squarrosa ★★★
Fat hen
Fat hen
Chenopodium album ★★★
Field horsetail
Field horsetail
Equisetum arvense ★★★
Field mustard
Field mustard
Brassica campestris ★★★
Flixweed
Flixweed
Descurainia sophia ★★★
Goat’s-beard
Goat’s-beard
Aruncus dioicus ★★★
Hare's ear mustard
Hare's ear mustard
Conringia orientalis ★★★
Hedge mustard
Hedge mustard
Sisymbrium officinale ★★★
Hoary cress
Hoary cress
Lepidium draba ★★★
Indian hedge mustard
Indian hedge mustard
Sisymbrium orientale ★★★
Jimson weed
Jimson weed
Datura stramonium ★★★
Kochia
Kochia
Bassia scoparia ★★★
Plantain
Plantain
Musa paradisiaca ★★★
Prickly lettuce
Prickly lettuce
Lactuca serriola ★★★
Russian pigweed
Russian pigweed
Axyris amaranthoides ★★★
Shepherd's purse
Shepherd's purse
Capsella bursa-pastoris ★★★
Sunflowers
Sunflowers
Helianthus ★★★
Tumble mustard
Tumble mustard
Sisymbrium altissimum ★★★
Vetches
Vetches
Vicia ★★★
White mustard
White mustard
Sinapis alba ★★★
Wild mustard, charlock
Wild mustard, charlock
Sinapis arvensis ★★★
Wild radish
Wild radish
Raphanus raphanistrum ★★★
Wormseed mustard
Wormseed mustard
Erysimum cheiranthoides ★★★
Biennial wormwood
Biennial wormwood
Artemisia biennis ★
Blue lettuce
Blue lettuce
Lactuca tatarica ★
Canada thistle
Canada thistle
Cirsium arvense ★
Common dandelion
Common dandelion
Taraxacum officinale ★
Docks
Docks
Rumex acetosella ★
Dog mustard
Dog mustard
Erucastrum gallicum ★
Hairy galinsoga
Hairy galinsoga
Galinsoga quadriradiata ★
Hedge bindweed
Hedge bindweed
Calystegia sepium ★
Leafy spurge
Leafy spurge
Euphorbia esula ★
Oak-leaved goosefoot
Oak-leaved goosefoot
Chenopodium glaucum ★
Pepper grass
Pepper grass
Panicum whitei ★
Perennial sow thistle
Perennial sow thistle
Sonchus arvensis ★
Redroot pigweed
Redroot pigweed
Amaranthus retroflexus ★
Russian thistle
Russian thistle
Salsola kali ★
Smartweed
Smartweed
Polygonum hydropiper ★
Smooth sowthistle
Smooth sowthistle
Sonchus oleraceus ★
Tansy mustard
Tansy mustard
Descurainia pinnata ★
Tartary buckwheat
Tartary buckwheat
Fagopyrum tataricum ★