Sortie ATZ Herbicide

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Active materials

Sortie ATZ herbicide is a selective preemergence herbicide for controlling most annual grasses, many annual broadleaf weeds and sedges in field corn, popcorn, seed corn, sweet corn, and grain sorghum (refer to Table 1. Weeds Controlled).

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

Mode of Action
Sortie ATZ herbicide contains two active ingredients: dimethenamid-P, as an inhibitor of cell division, Group 15; and atrazine, an inhibitor of photosynthesis at photo system II Site A, Group 5. Sortie ATZ herbicide typically controls weeds before or soon after they emerge from the soil.

Herbicide Resistance
Naturally-occurring biotypes of certain pests with resistance to the atrazine component in Sortie ATZ herbicide are known to exist. Selection of resistant biotypes, through repeated use of atrazine or related triazine herbicides (same mode of action), may result in reduced levels of control. If poor performance cannot be attributed to adverse weather conditions or improper application methods, a resistant biotype may be present. In such a case, additional treatments with this herbicide or related products are not recommended. Consult your local extension specialist or agricultural advisor for assistance in managing resistant weed biotypes.

Cleaning Spray Equipment
Clean application equipment thoroughly by using a strong detergent or commercial sprayer cleaner according to the manufacturer’s directions; then triple rinse the equipment before and after applying this product.

Apply Sortie ATZ herbicide preplant surface, preplant incorporated, preemergence, or early postemergence to corn or sorghum. Sortie  ATZ herbicide 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. Apply Sortie  ATZ herbicide with 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. Refer to Additives section for more information.

Application Rate
Use rates for Sortie ATZ herbicide when used alone, in tank mix, or in sequential applications are given in Table 2 (refer to General Tank Mixing Information and Crop-specific Information sections for more details). Use rates of this product vary by soil texture and organic matter. Soil texture groupings used in this label are coarse (sand, loamy sand, sandy loam), medium (silt, silt loam, loam, sandy clay loam), and fine (sandy clay, silty clay, silty clay loam, clay loam, and clay). When use rates are expressed in ranges, use the lower rates for more coarsely-textured soils lower in organic matter; 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 (refer to Table 2).

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