Northern corn rootworms are extremely abundant across much of Iowa this year. Lodging of first-year corn is widespread and in some counties the potential for yield loss is expected to be very high. Beetles also were abundant in some fields during late July and August and prevented pollination by clipping silks.
Iowa State University
Rice, Marlin E., "Northern corn rootworms in corn and soybean" (2001). Integrated Crop Management News. 1954.
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