Utah State University Extension
Western corn rootworm, Diabrotica virgifera virgifera, is one of the most devastating corn insect pests in the United States. In some years, corn rootworms can cause up to $1 billion in yield loss and control costs. In Utah, western corn rootworm has been detected in at least 13 counties (Fig. 1), but likely can be found throughout the state wherever corn is grown.
Hodgson, Erin, "Western Corn Rootworm" (2008). All Current Publications. Paper 985.