Metallic looking beatle skeletonizing grape leaves
Mon, Jul 6, 2009 at 7:34 AM
We have a swarming of metallic looking beatles skeletonizing our grape leaves. It isn’t anything like the pictures of Western skeletonizing bugs shown.

Japanese Beetles

Japanese Beetles

Hello wlarson,
These are mating Japanese Beetles, Popillia japonica , an invasive exotic species accidentally introduced to New Jersey in 1916. Since that time, the Japanese Beetles have spread throughout much of the eastern U.S. BugGuide does not list any sightings in Iowa, but there are reports from many surrounding states and the westernmost reports on BugGuide are from Kansas. Japanese Beetles feed on the leaves, flowers and fruits of countless ornamental plants, and they are most fond of roses. There are commercial traps available that lure the Japanese Beetles with bait and keep them from feeding on the plants.  Mom in Ohio says the Japanese Beetles make the leaves of her plants look like lace doilies.

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