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Regular scouting of rootworm beetles during late July and August, which corresponds with their egg-laying period, provides information on the potential for damage in that field if it is planted to corn next year. I will discuss rootworm beetle scouting recommendations fully in the next issue of CropWatch.
Be aware that rootworm beetles emerging before silks are available will feed on the corn leaf surface by scraping away the green surface tissue, producing a window-pane appearance on the leaf. This is not an economic concern. As silks emerge beetles will concentrate in the first silking fields to feed on silks and pollen.
Bob Wright
Extension Entomologist, Lincoln
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