Integrated Crop Management News

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Redlegged and differential grasshoppers have defoliated border rows of cornfields in Crawford and Carroll counties in west central Iowa. In some fields the damage started during July and grasshoppers ate everything except the stalk, ear, and leaf midribs, causing the plants to die by late August. Complete defoliation extended five to seven rows into the field in some areas. Grain yields will be reduced in these rows but little could have been done to prevent the damage once the grasshoppers moved into the tall corn.

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Iowa State University



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