What Can Be Done About Late-season Weeds? | Inputs & Insights | Corteva Agriscience

What Can Be Done About
Late-season Weeds?

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Ground view of clean rows of late season corn

Weeds may have gotten a slow start this spring, but they worked fast to play catch-up in corn and soybean fields across the Midwest. Hopefully your customers were able to implement an effective program approach to weed control, and there are minimal weed escapes. 

But if weed escapes are a problem, you may be asking yourself which products are available that can control late-season weeds and is it worth spraying those fields again? Unfortunately, by the time you’re reading this article, there is little that can be done with herbicides, making hand-weeding the most effective option. 

So, Now What? 

“Fortunately, late-emerging weeds don’t pose a very big threat to yield,” says Ron Geis, market development specialist, Corteva Agriscience. “However, their offspring can plague a field for several years, so preventing late-emerging weeds from seeding still benefits customers.” 

The best thing to do after a postemergence application is to intensively scout fields. Encourage customers to look for disease symptoms, insect damage and, of course, weed escapes. If there are still weeds present, you may want to consider hand-spraying weeds in the field or physical weed removal to lower populations of weed seed.

If there are trouble spots, a preharvest or postharvest strategy may be needed. This is also a good planning exercise for the following year. Knowing your weed problems and knowing where the trouble spots are will keep you on the right track. 

When applying herbicides early next season, always include residual products to help manage later weed flushes and keep the total weed seedbank low. 

“Growers have been seeing great postemergence residual control in corn with Resicore and in soybeans with EverpreX herbicides,” Geis says. “We’re also excited about more weed control options coming down the Corteva Agriscience pipeline, such as Resicore XL corn herbicide.”

Consider Fall Burndown Applications 

Your customers can take action against weeds this fall with a burndown application. Burndown applications provide farmers with numerous benefits, including a more streamlined workload with fewer hours of spring work, better-prepared fields at planting and the opportunity for increased yield potential come next harvest.

Field management is a never-ending cycle and one that takes continuous attention and care. Weeds are always evolving, and so are the solutions to control them. By treating weed control as a year-round job, you can continue to evolve with them. 


EverpreX® and Resicore® are not registered for sale or use in all states. Resicore is 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. Resicore XL has not yet received regulatory approval; approvals are pending. The information provided here is not an offer for sale. Always read and follow label directions.