Entomologists at Purdue University reported the first sighting of Japanese beetle adults on June 12 in the Evansville area (near White County in Illinois). Take note of this occurrence because, based on reports of grub injury this year, we could witness some large numbers of this pest this year. During the next couple of weeks, all of us should be on the lookout for this visually striking pest. The Japanese beetle adult is about 1/2 inch long and is shiny metallic green, with hard, bronze-colored wing covers. Along each side of the abdomen, just below the wing covers, are six tufts of white hairs.|
Japanese beetle adult on corn silks.
When Japanese beetles emerge, they will seek host plants on which to feed, and we all know that these insects feed on many types of hosts, including corn and soybeans, as well as flowers, ornamental plants, and fruits. Japanese beetles feeding on silks in cornfields and defoliating soybeans can result in economic damage. We will want to watch for the beetles moving into the edges of corn and soybean fields and be prepared to assess their population levels and the amount of injury they cause. We'll provide more information and management recommendations in a future issue of the Bulletin.--Kevin Steffey