General Information


Sortie ATZ herbicide is a selective preemergence herbicide for controlling most annual grasses, many annual broadleaf weeds, and sedges in field corn, seed corn, sweet corn, popcorn and grain sorghum.

Weeds Controlled

Some weed species may have triazine-resistant biotypes that will not be controlled adequately by this product. If resistant biotypes are suspected, use an alternate program or use non-triazine products such as Clarity or Prowl herbicide in combination with Sortie ATZ or use Distinct sequentially.


Sortie ATZ may be applied preplant surface, preplant incorporated, preemergence or may be applied early postemergence to corn or sorghum. Sortie ATZ will provide most effective weed control when applied (by ground or aerial equipment) and subsequently incorporated into soil by rainfall, sprinkler irrigation, or mechanical tillage prior to weed seedling emergence from soil. Sortie ATZ may be applied using either water or fluid fertilizer as the spray carrier, or impregnated onto and applied with dry bulk fertilizer. Sprayable fluid fertilizer as a carrier is not recommended for use after crop emergence unless the typical fertilizer burn symptoms on the crop are acceptable.

Application Rate

When use rates are expressed in ranges, use the lower rates for more coarsely textured soils lower in organic matter and use the higher rates for more finely textured soils that are higher in organic matter. Reduced rates may be used where partial control or reduced length of soil residual control is required.

Ground Application (Banding)

When applying Sortie ATZ herbicide by banding, determine the amount of herbicide and water volume needed using the formula in the label.

Aerial Application Methods and Equipment

Water Volume: Use 2 or more gallons of water per acre. The actual minimum spray volume per acre is determined by the spray equipment used. Use adequate spray volume to provide accurate and uniform distribution of spray particles over the treated area and to avoid spray drift.

Ground Application Methods and Equipment (Broadcast)

Water Volume: Use 5 or more gallons of water per acre. The actual minimum spray volume per acre is determined by the spray equipment used. Adequate spray volume must be used to provide accurate and uniform distribution of spray particles over the treated area and to avoid drift of spray particles to nontarget areas.


- Restricted Use Pesticide: This product is a restricted use herbicide due to ground and surface water concerns. Users must read and follow all precautionary statements and instructions for use in order to minimize potential for atrazine to reach ground and surface water.

- Maximum seasonal use rate: DO NOT apply more than a total of 4.6 pints of Sortie ATZ per acre, per season. Sortie ATZ contains 3.3 pounds of the active ingredient atrazine per gallon (0.41 pounds of ai per pint). When tank mixing or sequentially applying atrazine or products containing atrazine to corn or sorghum, the total pounds of atrazine applied (lbs ai/A) must not exceed the specific seasonal rate limits from preemergence, or postemergence, or preemergence + postemergence sequential applications, as noted below:

Prior to crop emergence: DO NOT exceed 1.6 pounds of atrazine ai per acre on highly erodible soils (as defined by the Natural Resource Conservation Service) with less than 30% plant residue cover. DO NOT exceed 2.0 pounds of atrazine ai per acre on other soils.

- After crop emergence: DO NOT exceed 2.0 pounds of atrazine ai per acre on any soil.

- Prior to and after crop emergence (sequential applications): DO NOT exceed a total of 2.5 pounds of atrazine ai/acre on any soil per year.

- Sortie ATZ is not for sale, distribution, or use in Nassau or Suffolk counties in New York state.

- Crop Rotation Restriction:

- If the crop treated with Sortie ATZ is lost to adverse weather or for other reasons, the area treated may be replanted to corn and grain sorghum immediately. If the original Sortie ATZ treatment was broadcast, DO NOT make a second application of Sortie ATZ if the combined rate exceeds the maximum rate per season. If the original application was banded and the second crop is planted in the row middles, a second band application may be applied.

- Corn, sorghum, soybeans, cotton or peanuts may be planted the year following treatment. Injury may occur to soybeans planted on soils having a calcareous surface layer.

- DO NOT plant sugar beets, tobacco, vegetables (including dry beans), spring-seeded small grains, or small seeded legumes and grasses the year following application, or injury may occur.

- Stress: DO NOT apply to crops under stress such as stress due to lack of moisture, hail damage, flooding, herbicide injury, mechanical injury, or widely fluctuating temperatures, as injury may result.

- DO NOT apply through any type of irrigation system. DO NOT contaminate irrigation ditches or water used for domestic purposes.

See label for tank mix information/directions.

Limitations, Restrictions, and Exceptions


Sortie ATZ may be applied preplant, preplant incorporated, preemergence or postemergence to grain sorghum up to 12 tall.

All Sortie ATZ applications must only be made to sorghum seed that has been properly treated by the seed company with an approved chloroacetamide herbicide safener or severe injury may occur.

Refer to section II. Application Instructions to determine Sortie ATZ use rates by soil type and use pattern. DO NOT use Sortie ATZ on sorghum planted in coarse-textured soil.

For best performance, make preemergence surface applications within 5 days of the last preplant tillage. If grasses have emerged, Sortie ATZ must be applied before they reach the 2-leaf stage or must be used in combination with an effective postemergence herbicide.

Under high soil moisture or cool conditions, Sortie ATZ application may cause temporary stunting or leaf wrapping of sorghum. Sorghum will normally outgrow these symptoms in 10-14 days.

Sortie ATZ is not registered for use on sweet or forage sorghum.

Sorghum forage may be grazed or fed to livestock 60 days or more after preemergence application of Sortie ATZ.

Sorghum forage may be grazed or fed to livestock 45 days or more after postemergence application of Sortie ATZ.

Grain and fodder may be harvested and fed 80 days or more after application of Sortie ATZ.

The rates listed are intended for full season control of targeted weeds. Reduced rates (1.5-3.0 pints of Sortie ATZ per acre) may be used where partial control or reduced length of soil residual control is required, such as postemergence applications, or preemergence applications where cultivation or sequentially applied herbicides will be used for added control of the same targeted weed species. Use 1.5-2.0, 2.0-2.5, and 2.5-3.0 pints of Sortie ATZ per acre on coarse, medium, and fine soil, respectively.

Application Timing

Preemergence Surface Applications: Broadcast treatment uniformly to the soil surface after planting and before crop emergence. Rainfall, sprinkler irrigation, or shallow mechanical incorporation after application is required to move this product into the upper soil surface where weed seeds germinate. If adequate rainfall or irrigation does not occur and weed seedling emergence begins, a shallow cultivation or rotary hoeing will improve performance.

Weeds Controlled

Cupgrass, Woolly; Johnsongrass (seedling); Millet, wild proso; Panicum, Texas; Sandbur; Shattercane; Signalgrass, broadleaf: Partial control or suppression. To complement control, Sortie ATZ should be used in tank mixes or sequential applications with other herbicides that provide additional control of these weed species.

Cocklebur; Nightshade, black, eastern black, hairy; Ragweed, Giant; Velvetleaf; Nutsedge, yellow: For best control of these species, use the highest rate specified by soil type. If dry conditions exist near application or excessive rainfall occurs early in season, a postemergence herbicide or cultivation may be required to help control these weeds.

Restricted Entry Interval

12 hours

Exception: If the product is soil injected or soil incorporated, the Worker Protection Standard, under certain circumstances, allows workers to enter the treated area if there will be no contact with anything that has been treated.