Feeding Stimulant for Western and Northern Corn Rootworm Adults

In tests conducted at Brookings, S. Dak., during the summer of 1963, presence of a feeding stimulant for western and northern corn rootworm adults, Diabrotica virgifera LeConte and D. longicornis (Say), was demonstrated in the kernel, pistillate branch, silks, leaves, and root of corn, and in squash blossoms. The highest concentration of the feeding stimulant, in extracts of plant parts tested, occurred in corn kernels.