The ‘eastern variant’ of the western corn rootworm (WCR), Diabrotica virgifera virgifera, has developed a behavioral adaptation to the corn-soybean rotation in some parts of the Midwest. The variant western corn rootworm (VWCR), first documented in east central Illinois, then in Michigan, Indiana and Ohio, is known to circumvent the corn-soybean crop rotation by laying eggs in soybean. Like normal corn rootworm beetle populations, the Vwcr moves readily between corn and other crops between late July and early September. Unlike normal rootworm beetles, the VWCR can lay heavy populations of eggs in soybean fields, resulting in risk of economic injury to corn planted the next year.