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Rootworm Eggs Reaching Peak Hatch in Iowa | Integrated Crop Management
https://crops.extension.iastate.edu/cropnews/2025/06/rootworm-eggs-reaching-peak-hatch-iowa
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Corn rootworm egg hatch in Iowa typically occurs from late May to the middle of June, with an average peak hatching date of June 6 in central Iowa. Development is driven by soil temperature and measured by growing degree days (GDDs).
