Inputs & Insights

A Weed-Free Field Leads to Higher Yield

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September is a time for reflection as the growing season ends and you and your customers spend countless hours in the field for harvest. If your customers found themselves chasing weeds this season, now is the time to consider adjustments to next season’s weed control program.

If weeds are left to grow with, or ahead of, corn at the beginning of the season, yield potential is already decreasing. Research from Iowa State University has shown that the most competitive weeds in corn are about 3 to 4 inches tall at the V3-V4 corn growth stage, and these weeds can reduce yield by about 3 bu./A for every day they are left uncontrolled. From planting until canopy closure, it’s critical to keep fields weed-free so corn can grow without being robbed of sunlight, water and nutrients.

Across the Corn Belt, grass and broadleaf weed control continues to be a high priority. Many weeds, including waterhemp, giant ragweed, foxtail, Palmer amaranth and velvetleaf, continue to spread and develop resistance to multiple herbicides. To combat resistant weeds in cornfields, Corteva Agriscience is proud to offer multiple residual herbicide solutions with versatility and multiple modes of action to control weeds several ways.

SureStart® II herbicide and Resicore® herbicide can be used together in a program approach or separately to meet your customers’ agronomic needs. SureStart II is a proven performer applied preemergence, or at planting, and can be followed by Resicore early postemergence. This program approach provides four modes of action to control your customers’ weeds in corn, including herbicide-resistant species. Plus, farmers can add atrazine and glyphosate to the program for six unique modes of action.

As combines move through fields this fall, remind your customers that a residual herbicide with multiple modes of action can give corn a clean start against their worst weeds next season. Learn more about our corn herbicides or contact your Corteva sales representative to plan a weed control program.

Resicore and SureStart II are not registered for sale or use in all states. Resicore and SureStart II are not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions.

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