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Two corn rootworm (CRW) species, the western (Diabrotica virgifera LeConte) and the northern (Diabrotica barberi Smith & Lawrence), account for the majority of CRW damage in the Corn Belt. The larvae are very similar and difficult to distinguish from one another. Western CRW beetles are identifiable by striles (female) or nearly blackish wings (male). Northern CRW adults are green to yellowish green with females being slightly longer and having larger abdomens. When gravid feemales are squeezed, eggs will be expressed.
Read more about Adult Corn Rootwom beetle scouting and management at Genuity.com.