Integrated Crop Management News

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Grasshopper nymphs were found in central Iowa during late May and they now have reached a size where they are getting the attention of crop scouts. No economic injury has been reported, but their appearance in weedy areas and field edges should serve as an early warning of potential crop damage. There are no good economic thresholds for grasshoppers in either soybean or corn. Old thresholds recommended that you count the number of grasshoppers per square yard, but I have always found this method frustrating.

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Iowa State University



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