Japanese Beetle Update

Two reports of Japanese beetles have been received as a result of the article in this newsletter two weeks ago (HHPN, July 12, 1996, page 116). First, we received confirmation that Japanese beetle adults had emerged from the soil and were active in Rock Island County Illinois, just across the river from Davenport, as of July 15.

The second report was receipt of a sample of Japanese beetle adults collected in East Dubuque, Illinois, and more importantly for our records, on this side of the Mighty Mississippi, in Dubuque, Iowa. Beetles were collected feeding on red raspberries. The collection from Dubuque will constitute a new county record.

As mentioned before, the head and thorax are shiny metallic-green and the wing covers are metallic-bronze. This particular drawing gives a better view of the rows of six white hair-tufts that line each side of the abdomen. Length of Japanese beetle adults is 1/3 to 3/5 inch. Adults emerge during June and July and live for several weeks. They may be present and cause damage for the entire summer.

Please continue to report any sightings of Japanese beetle. Reports of new county records in Iowa should include specimens. Collected samples should be preserved in alcohol and mailed to Extension Entomology, 109 Insectary, ISU, Ames IA 50011. Please include exact collection locale with the specimens.

This article originally appeared in the July 26, 1996 issue, p. 136.


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