What is metolachlor for?

Metolachlor was registered with the EPA in 1976. It is a selective herbicide for the control of annual grass weeds, yellow nutsedge, and some broadleaf species. Metolachlor is used in corn, peanuts, and soybeans.

What weeds does Dual Magnum control?

Dual Magnum is a selective herbicide that can be applied for control of most annual grasses and certain broadleaf weeds in corn (all types); cotton; grasses grown for seed; horseradish, legume vegetables, peanuts; potatoes; pumpkin, rhubarb, safflowers; sorghum (forage, grain and sweet), soybean, sugar beets; …

What is Bicep II Magnum?

Bicep II Magnum is a selective herbicide recommended for preplant, preemergence, or postemergence control of most annual grasses and broadleaf weeds in corn.

Is metolachlor a pesticide?

In the Midwestern Corn Belt, metolachlor is among the top five most frequently detected pesticides in raw and finished surface water. A high percentage of surface water samples from numerous locations for several months post-application contain metolachlor.

How do you use metolachlor?

General Information. Metolachlor controls weeds by inhibiting growth of seedling shoots. It proves effective on weeds when applied before germination; hence, it is typically applied before or immediately after planting of the crop.

How long does metolachlor last in the soil?

Metolachlor has the potential to range from a moderately mobile to a highly mobile material in different types of soil. It is persistent in surface soil with a half-life in the 6-12 inch soil layer ranging from 7 to 292 days. Detections were made as far as the 36-48 inch soil layer in some tests.

What is the difference between Dual Magnum and Dual II Magnum?

The difference lies in the fact that Dual II Magnum contains the resolved isomer of metolachlor (S-metolachlor), whereas the two new products use an unresolved blend of isomers (the form of metolachlor used in Dual formulations prior to Dual Magnum). contain a blend of four isomers.

How long does Dual Magnum last?

The residual effects of Dual II Magnum lasted 19 days longer than that of Outlook® herbicide, and 33 days longer than Harness and Surpass herbicides.

What is Callisto herbicide?

Callisto Herbicide is a systemic preemergence and postemergence herbicide for the selective contact and residual control of broadleaf weeds in field corn, seed corn, yellow popcorn, sweet corn, and other listed crops.

Are all generic metolachlor products the same as dual?

Most generic products do not have all the uses that the “Dual” labels have. Be sure to read the labels and be sure the formulations are labeled for the intended use. Do not take it at face value that all the generic metolachlor products are “the same as Dual”.

Do all metolachlor products contain the safener and isomers?

Some contain both isomers, others contain only the s-isomer and are usually designated as s-metolachlor. Some may contain the safener and others do not. It is not always apparent what formulation is used or if a product has a safener.

Where can I find more information about S-metolachlor?

More detailed information can be found in the document entitled, “S-Metolachlor: Human Health Risk Assessment for Petition for the Establishment of Tolerances and Registration for Use in/on Rosemary and Dill (PP#9E8800) and Amended Use in/on Soybean (PP# 9F8764),” in docket IDs EPA-HQ-OPP-2019-0652 and EPA-HQ-2020-0047. IV. Other Considerations

Does EPA have sufficient data to assess the hazards of S-metolachlor?

EPA has sufficient data to assess the hazards of and to make a determination on aggregate exposure for S-metolachlor including exposure resulting from the tolerances established by this action. EPA’s assessment of exposures and risks associated with S-metolachlor follows.