What Can Be Done About Late-season Weeds?

Something went wrong. Please try again later...
Marestail top view

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, you 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?

“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 is still beneficial.”

The best thing to do after a postemergence application is to intensively scout fields. 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 specific weed problems and where the trouble spots are will keep you on the right track.

When applying herbicides early next season, it’s important to always include residual products. This will 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 Kyro, the newest solution in our corn herbicide portfolio.”

Kyro™ herbicideis the first corn herbicide to combine the three proven modes of action of acetochlor, clopyralid and topramezone in a single premix for both postemergence and residual control of more than 65 of the toughest broadleaf and grass weeds.

Consider Fall Burndown Applications

You can take action against weeds this fall with a burndown application. Burndown applications provide 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. And if you still have prepay funds with the TruChoice® offer, investing in fall weed control is a great way to use those remaining dollars. See qualifying products here.

EverpreX®, Kyro™ and Resicore® are not registered for sale or use in all states. Kyro and Resicore 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.


The More You Grow

Find expert insights on agronomics, crop protection, farm operations and more.

Browse the blog

Subscribe for Updates