With another growing season coming to an end, the planning for next year’s weed management decisions should have already begun. Fortunately for Wisconsin producers two new tank-mix herbicides have been recently registered for use in Wisconsin corn production. It is important to note that these herbicides do not contain novel sites of action nor active ingredients. These products consist of new tank-mixes of active ingredients that are already commercially available in other herbicides. Remember that the use of herbicides with multiple effective sites of action is one of the recommended foundational strategies of an effective integrated weed management program that minimizes the risk of the development of herbicide-resistant weeds. Let’s dive into the details of these new products.
Valent USA has released MaverickTM for control of annual grass and broadleaf weeds in field corn, seed corn, silage corn, and yellow popcorn. Maverick TM consists of clopyralid (group 4), pyroxasulfone (group 15) and mesotrione (group 27). For more information on this product please visit the product webpage.
Corteva Agriscience has released Resicore® XL for control of annual grasses and broadleaf weeds in field corn, field seed corn, field silage corn, and yellow popcorn. Resicore® XL consists of clopyralid (group 4), encapsulated acetochlor (group 15), and mesotrione (group 27). Resicore® XL has an extended application window (up to 24” corn) compared to Resicore® (up to 11” corn). For more information on this product please visit the product webpage.
For more information on additional products that were made available in 2022, please visit “What’s New for Agronomic Weed Control in 2022” by Penn State Extension Weed Science.
Remember to always read carefully and follow the instructions of individual products labels. The label is the law.
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- Nick Arneson, Weed Science Program Outreach Manager, Department of Agronomy, University of Wisconsin-Madison
- Ryan DeWerff, Weed Science Research Specialist, Department of Agronomy, University of Wisconsin-Madison
- Rodrigo Werle, Assistant Professor and Extension Cropping Systems Weed Scientist, Department of Agronomy, University of Wisconsin-Madison