Update on the Asian long-horned beetle in Chicago

Asian long-horned beetleAs reported in the last issue, the Asian long-horned beetle was discovered in Chicago in July. It is thought to have arrived in wood crating and pallets with Chinese imports. This beetle poses a threat to urban and rural forests. Healthy as well as declining maples, horse chestnuts, poplars, willows, elm, mulberry and black locust trees have been reported infested in a New York infestation.

As of August 7th, eight square miles of Chicago have been put under quarantine. According to a Forest Service State and Private Forestry report this original infestation is located in the Ravenswood neighborhood of Chicago.

Asian beetle damageThe beetles have now been found in two additional locations; near Addison in Bloomingdale Township, in unincorporated DuPage County and in the town of Summit in suburban Cook County. They are thought be the result of three separate introductions rather than a spread from one infestation to the others.

Surveys continue in the Chicago area with plans to remove, chip and burn all infested trees between December 1998 and May 1999.

Updates on this situation can be found at a State and Private Forestry website at