Integrated Crop Management News

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Seedling infection by Stewart's disease (greater than 30 percent) has been reported in some southern Iowa fields planted to field corn. The disease also was reported by Iowa State University field specialists-crops in field corn in central and northern Iowa. Stewart's disease is spread by overwintering flea beetle adults as they feed on corn seedlings. Overwintering flea beetle populations have declined, so questions are focused on what happens next. This article gives some questions and answers about Stewart's disease as the growing season progresses.

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Iowa State University



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