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When ’hopper clouds' filled the skies

 It’s been another bad year for grasshoppers in many parts of the Prairies.

Some farmers have told us that whatever crop managed to grow in this summer’s drought was eaten by the voracious insects.

The problem isn’t new, of course.

Histories of the early days of farming on the prairie, particularly in the United States in the mid-19th century, are replete with hair-raising stories of grasshopper scourges.

In fact, some of the stories are so far removed from modern encounters with grasshoppers that it’s hard to believe they are true.

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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.