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Articles tagged under: Armyworms

Armyworm Alert

Published Yesterday

According to the NDSU Crop and Pest Report, significant armyworm damage has been seen in wheat in central parts of the state. Benson, Pierce and Rolette counties have had as much as 90 percent defoliation. The economic threshold for treatment…
Latest NewsCrops

Armyworms Causing Damage

Published July 31, 2025

True armyworms are causing severe feeding injury in lodged grain fields from storms in North Dakota and western Minnesota. According to the NDSU Crop and Pest Report, caterpillars completely defoliated leaves and grain heads were clipped off. Most fields are…
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Armyworms Confirmed at Economic Threshold

Published July 27, 2025

University of Minnesota Extension Small Grains Specialist Jochum Weirsma says they're receiving reports that armyworms are impacting fields at an economic level. "Scouts as well as individual growers have found a fair number of armyworms at treatable levels all along…
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Armyworm Moves North

Published July 5, 2024

The true armyworm migrates into North Dakota from the south. Multiple moth flights were seen in early June and they are now mature two-inch-long caterpillars. The NDSU Extension Crop and Pest Report says larvae feeding has been seen on corn…
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Early ’23 Heat Could Impact ’24 Crop

Published January 14, 2024

Early season heat in 2023 resulted in additional pest pressure. NDSU Extension Research Entomologist Mark Boetel said his own plots experienced early armyworms and cutworms. “If weed infestations really get going, they can be attractive to those pests.” Rootworm control…
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