Does Your Field Have Western Bean Cutworm larva?

Sep 01, 2015

Over the past few weeks, we have been receiving calls, emails and texts about finding large caterpillars feeding on corn ears (see photo). In most cases, these are turning out to be Western bean cutworms. Although our numbers have been about the same as previous years, we may have seen slightly more survival. This may be due to the drier and milder July, as well as delayed and patchy corn maturity which provided a lot oviposition sources. To be clear, none of this damage appears to be economic, but yet it would be important to note for future years if you have found these larvae in your field. While it is too late to control for WBC (once they enter the ear, they are protected against insecticide), knowing where larvae have been found would be good information as we continue to monitor this emerging corn pest in Ohio.

Source: osu.edu

Video: Wisconsin Corn and Soybean Weed Management Updates and Considerations for 2026 and Beyond

Dr. Rodrigo Werle, associate professor and extension weed scientist, UW–Madison, shares the latest updates and future considerations for corn and soybean weed management in Wisconsin. This presentation covers herbicide resistance trends in waterhemp, including newly confirmed cases of HPPD and S-metolachlor resistance, and emphasizes the importance of residual herbicides and strategic tank mixes for consistent control. Rodrigo also introduces upcoming technologies like Vyconic soybeans and new herbicide products, discusses integrated weed management strategies such as planting green with cover crops, and highlights practical recommendations for 2026 and beyond.

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