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Sandhill cranes remain a problem for corn growers

A wildlife group is hoping to help farmers get some reimbursement for crop damage by sandhill cranes.

Roger Schnitzler with the Crane Foundation says the birds have adapted to modern agriculture and have greatly increased in numbers. “They’ve greatly increased from maybe ten in the whole state in the 1940s to maybe 100-thousand cranes in Wisconsin and maybe another 50-70 thousand in our sister state across the lake in Michigan.”

And, he says the large number of cranes is often devastating on newly-planted corn.

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Dr. Fei Yang Discusses Corn Rootworm, European Corn Borer, and Pest Monitoring

Video: Dr. Fei Yang Discusses Corn Rootworm, European Corn Borer, and Pest Monitoring

What insect threats are Minnesota corn growers facing, and what research is helping farmers stay ahead of them?

At the 2026 MN Ag Expo, University of Minnesota entomologist Fei Yang shared updates on three Minnesota Corn-supported research projects focused on insect monitoring, seed treatments, and pest resistance.

Current work includes statewide monitoring programs that use pheromone, light, and sticky traps to track key pests such as black cutworm, true armyworm, corn earworm, European corn borer, and corn rootworm. Researchers are also evaluating whether high-rate seed treatments provide effective corn rootworm control and studying the development of resistance in European corn borer populations to Bt corn traits.

These projects help researchers better understand pest pressures across Minnesota and provide farmers with practical information to support informed management decisions.