Corn Beetle

Asked September 1, 2017, 11:41 AM EDT

One of my acres of corn was infested with a corn beetle. Pretty much lost the whole acre of corp in that particular plot. Corn and stalks cut down, but what can I do to ensure that this might not happen next year. The seed planted this year was a non-GMO seed, prior years was a hybrid seed.

Sherburne County Minnesota

1 Response

This is a Southern Corn rootworm beetle (Diabrotica undecimpunctata). Here are some links for management.

https://extension.entm.purdue.edu/fieldcropsipm/insects/corn-rootworms.php
https://www.cropscience.bayer.us/learning-center/articles/recognizing-corn-rootworm-risks
http://www.cornandsoybeandigest.com/corn/spray-adult-rootworm-beetles
I would also consult with an Extension Specialist there in Minnesota. Management of corn rootworms is very much a site specific issue. Generally Southern Corn rootworm has not been considered a major pest of corn in Minnesota, so you need to talk to a specialist there to see what might be going on.
Actually I just took a closer look at the pictures. I don't think this is the Southern Corn rootworm. I would check with an Extension Entomologist there in Minnesota to see what this is and how to control it.