Trust 4EC Herbicide

Trust 4EC Herbicide

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Product Overview

Trust 4EC Herbicide is a preemergence formula that provides long-lasting control and suppression of small-seeded broadleaf weeds and annual grasses in soybeans, wheat, cotton and vegetable crops. This formulation contains 43% Trifluralin which is effective in controlling unwanted weeds such as bromegrass, barnyardgrass, carpetweed, crabgrass, common lambsquarters, foxtail, pigweed (redroot, smooth), sandbur, shattercane, woolly cupgrass, and more. Generally, it is incorporated into the soil before planting, and can be combined with liquid fertilizer or can be coated to dry fertilizers. It comes in a liquid emulsifiable concentrate formulation which can be mixed readily with water. It can also be tank-mixed with a wide range of herbicides for a broader spectrum of control and long-lasting protection against weeds. Available in a 2.5-gallon jug.

Features and Specs

Active Ingredient Trifluralin - 43%
Target pests Barnyardgrass, bromegrass, carpetweed, crabgrass, foxtail (giant, green and yellow), common lambsquarters, pigweed (redroot, smooth), sandbur, seedling johnsongrass, shattercane and woolly cupgrass.
For use in Soybeans, cotton, wheat, and many other field and vegetable crops.
Application Generally, product is applied before planting and incorporated. It also may be applied and incorporated in the fall in certain crops when the soil can be worked to allow thorough mixing.
Pet safe Yes, if used as directed on label.
Formulation Liquid emulsifiable concentrate.
Special Features May be tank mixed with many residual herbicides to provide a broader spectrum of control.
Shipping Weight 23.00 lbs
Manufacturer Winfield United CP (Mfg. Number: 180298)
EPA Registration 1381-261




  • Applied according to directions and under normal growing conditions, this product will not harm the treated crop.
  • Over application may result in crop injury or rotational crop damage from soil residue.
  • Uneven application or improper incorporation of this product can result in erratic weed control or crop injury.
  • Seedling disease, cold weather, deep planting, excessive moisture, high salt concentration or drought may weaken crop seedlings and increase the possibility of damage from this product. Under these conditions, delayed crop development or reduced yields may result.
  • Do not apply this product to soils that are wet or are subjected to prolonged periods of flooding as poor weed control may result.


  • Do not use this product on any crop grown in Pecos County or Reeves County, TX.
  • Do not use in MT.

Chemigation: This product may be applied by chemigation on certain crops. See instructions for chemigation in the "Crops" section of this label.


This Product Alone: This product may be mixed with water or most liquid fertilizer materials. Prior to mixing this product in liquid fertilizer, refer to the label section entitled "TESTING FOR COMPATIBILITY IN LIQUID FERTILIZERS" for testing procedures to determine compatibility with the liquid fertilizer product to be used. The combination of this product with solution and suspension-type fertilizers provides weed and grass control equal to water sprays.

Fill spray tank 1/3 to 1/2 full with clean water or liquid fertilizer. Start agitation. Add correct amount of this product and continue agitation while filling tank to required spray volume.

Restriction: Do not allow water or spray mixture to back siphon into a water source.

This Product in Tank Mix: This product may be tank mixed with other products and applied with water or most liquid fertilizer materials. Prior to mixing tank mixes containing this product with liquid fertilizer, refer to the label section entitled "Testing for Compatibility in Liquid Fertilizers" for testing procedures to determine compatibility with the liquid fertilizer product to be used.

It is the pesticide user's responsibility to ensure that all products are registered for the intended use. read and follow the applicable restrictions and limitations and directions for use on all product labels involved in tank mixing. Users must follow the most restrictive directions for use and precautionary statements of each product in the tank mixture.

Vigorous, continuous agitation during mixing, filling and throughout application is required for all tank mixes. Sparger pipe agitators generally provide the most effective agitation in spray tanks. To prevent foaming in the spray tank, avoid stirring or splashing air into the spray mixture. To prevent foaming during filling, keep the end of fill pipe below the surface of the liquid in the spray tank.

Mixing Order: Fill the spray tank to 1/4 to 1/3 of the total spray volume required. Start agitation. Add different formulation types in the order indicated below, allowing time for complete mixing and dispersion after addition of each product. Allow extra mixing and dispersion time for dry flowable products.

Add different formulation types in the following order: Dry Flowables (DF); Wettable Powders (WP); Aqueous Suspensions (AS); Flowables (F); and Liquids (L).

Maintain agitation and fill spray tank to 3/4 of total spray volume. Add this product and other emulsifiable concentrates (EC) and any solutions (S).

Finish filing 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 particulariy useful for this purpose. Settled material may be more difficult to resuspend than when originally mixed.

Restriction: Do not allow water or spray mixture to back siphon into a water source.

Pre-mixing: Dry and flowable formulations may be pre-mixed with water (slurried) and added to the spray tank through a 20 to 35 mesh screen. This procedure assures good initial dispersion of these products in liquid fertilizer or water. Line screen in the spray tank should be no finer than 50 mesh (100 mesh is finer than 50 mesh).


As spray volume decreases. the importance of accurate calibration and uniform application increases. Check calibration and uniformity of spray application daily. To avoid spray drift, do not apply when winds are gusting or when wind speed is greater than 15 mph.

Ground Broadcast Application:

Apply this product in 5 to 40 gallons of liquid carrier per acre (broadcast basis), using any properly calibrated, low pressure herbicide sprayer that will apply the spray uniformly. The carrier may be water or liquid fertilizer as specified for the crop to be treated in the ·CROPS" section of this label. For band application, adjust herbicide rate and spray volume in proportion to the band width and row width treated.

Aerial Broadcast Application:

Apply this product in 5 to 10 gallons of water per acre. Adjust pump pressure, nozzle arrangements, speed and application height to provide uniform application to the soil surface. Use swath markers or flaggers to assure proper swath width interval.

Application with Dry Bulk Fertilizer:

Dry bulk fertilizers impregnated or coated with this product may be applied as a pre-plant incorporated treatment on listed crops. All label directions for this product regarding application rates, incorporation directions, special instructions and precautions should be followed. Read and follow all label instructions below concerning use of this product with dry bulk fertilizer. Properly applied dry bulk fertilizers impregnated with this product provides weed and grass control equal to water sprays. Use the following formula to calculate the amount of this product required to impregnate a ton of dry bulk fertilizer.

Pint of the product per acre x 1000/lbs. of fertilizer per acre = Quarts of the product per ton of fertilizer.

Limitations: Apply a minimum of 200 pounds per acre of dry fertilizer impregnated with this product at the specified broadcast rate per acre. Any commonly used dry fertilizer can be used for impregnation of this product except coated ammonium nitrate and pure limestone. These materials will not absorb the herbicide. Blends containing mixtures of these materials can be impregnated.


Generally, Trust 4EC herbicide is applied before planting and incorporated. It also may be applied and incorporated in the fall in certain crops when the soil can be worked to allow thorough mixing.

Spring Application: Apply and incorporate this product any time after January 1 when soil can be worked and is in a condition which allows thorough mixing to ensure uniform incorporation. See "CROPS" section for application timing and directions for specified crops.

Fall Application: Fall application can be used for all crops for which this product is specified as a pre-plant incorporated treatment. Refer to "CROPS" section for any crop specific Fall application instructions. In the states of CA, MN, ND and SD apply and incorporate this product any time between September 1 and December 31. In all other states, Fall apply this product between October 15 and December 31. Ground may be bedded up over Winter. On bedded ground, reduce beds to desired height before planting, by moving some treated soil from beds into furrows. Where soil is left flat over Winter, care should be taken not to tum up untreated soil during Spring bedding operations. Destroy established weeds during seedbed preparation. Destroy weeds established in furrows as a result of exposing untreated soil before planting. Do not make Fall application on fields which remain wet or subject to periods of flooding.

Pre-emergence Application Immediately After Planting: Apply and incorporate this product immediately after planting and prior to crop germination. Adjust incorporation equipment so as not to disturb planted seed. Refer to the "CROPS" section of this label for crop specific instructions.

Post-emergence and Lay-by Application: Apply and incorporate this product at the specified rate to the established crop at or before the last CUltivation. Required pre-harvest intervals for treatments with this product for certain crops are specified in the "CROPS" section of this label. Crop cover may prevent uniform soil coverage from over-the-top sprays. To avoid this problem, use drop nozzles or directed sprays to achieve uniform soil coverage.


Grassy Weeds:

Annual bluegrass, Barnyardgrass (Watergrass), Brachiaria (Signalgrass), Bromegrass (Cheatgrass, Downy brome), Cheat (Chess), Crabgrass (Large crabgrass, Smooth crabgrass), Foxtail (Bottlegrass, Bristlegrass, Giant Setaria spp. foxtail, Green foxtail, Foxtail millet, Pigeongrass, Robust foxtail, Yellow foxtail), Guineagrass, Itchgrass (Raoul grass), Johnsongrass (from seed) (rhizome), Junglerice, Oats (Wild), Panicum (Fall panicum, Spreading panicgrass), Red rice, Ryegrass, Italian (Annual ryegrass), Sandbur (Burgrass), Shattercane (Wild cane), Sprangletop, Stinkgrass (Lovegrass), Texas panicum (Buffalograss, Coloradograss), Wooly cupgrass.

Broadleaf Weeds:

Carpetweed, Chickweed, Field bindweed, Goosefoot, Henbit, Knotweed, Kochia (Fireweed, Mexican fireweed), Lambsquarter (Common), Pigweed (Carelessweed, Palmer Amaranth, Prostrate pigweed, Redroot, Rough pigweed, Spiny pigweed), Puncturevine (Western U.S. only, Caltrop, Goatweed), Purslane (Common), Pursley, Florida (Florida purslane, Mexican clover, Pusley), Russian thistle (Tumbleweed), Stinging nettle (Nettle).



This pesticide is extremely toxic to freshwater marine, and estuarine fish and aquatic invertebrates including shrimp and oysters. Do not apply in a manner which will directly expose canals, lakes, streams, ponds, marshes or estuaries to aerial drift. Do not contaminate water when disposing of equipment washwaters. Do not apply directly to water or to areas where surface water is present or to intertidal areas below the mean high water mark.

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Questions & Answers

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Can Trust 4EC Herbicide be used on sunflowers and pumpkins?

The Trust 4EC Herbicide label does not list pumpkins on the label so we are unsure if it would be safe to apply around them or prior to planting them. It does, however, list Sunflowers as a species that you can safely apply to the areas intended for them to grow, prior to planting. You can see the full use instructions around Sunflowers on page 47 of the Trust 4EC Product Label

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