Northern Corn Rootworm is a growing problem in new locations in North Dakota and northern Minnesota. Southwest Research and Outreach Center Integrated Pest Management Specialist Brue Potter credits the expansion of extended diapause. Extended diapause allows the eggs to remain dormant for one or two seasons, reducing the effectiveness of crop rotation. “Which is a new wrinkle; we’ve always had a little bit in continuous corn,” said Potter. “The problem with extended diapause is it ebbs and flows; it is not a constant problem like weeds.”
