In recent years, we have conducted a series of experiments on the basic biology of the western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) with an eye toward resistance management. We have documented that larvae can significantly move at least three plants down the row and across narrow-row corn, we have demonstrated that larvae can survive for at least 24 days on most grasses tested, and we have collected data on the effects of Monsanto’s recently registered product, YieldGard® Rootworm, on larval movement that implied that this product is not a preferred feeding site when alternatives were available. More recently, we have demonstrated that western corn rootworm larvae will move from alternate hosts to YieldGard® Rootworm when the alternate hosts are killed with herbicide. These data will be reviewed and discussed in terms of resistance management with the currently registered product and other potentially higher-dosed products.
Species 1: Coleoptera Chrysomelidae Diabrotica virgifera virgifera (western corn rootworm)
Keywords: resistance management, herbicide tolerance
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