Forest Pests: Insects, Diseases & Other Damage Agents

Ashleaf Gall Mite

Solomon, J.D.; Leininger, T.D.; Wilson, A.D.; Anderson, R.L.; Thompson, L.C.; McCracken, F.I. 1993. Ash pests: A guide to major insects, diseases, air pollution injury and chemical injury. Gen. Tech. Rep. SO-96. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 45 p.

Pest. - Ashleaf gall mite, Aceria chrondriphora Keifer; mites are elongate, spindle shaped, and soft bodied; hardly visible to the naked eye; live inside leaf galls throughout the United States and southern Canada.

Injury. - The galls on the upper surface of leaves are greenish yellow, 2 to 3 mm in diameter, reniform in shape, solitary but numerous, scattered along the lateral veins, and reduce esthetic value of trees.

Prevention and Control. - Natural controls are usually adequate; fallen leaves should be raked and destroyed; direct controls are rarely needed.

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