Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001728
11/12/99
Gall midges
More than 1,000 species of gall-forming midges have been
described in North America. These differ from gall wasps
in that the adults are tiny (1 to 3 mm), mosquitolike
flies, not wasps. Trees that frequently support gall
midges include oak, willow, elm, maple, walnut, hickory,
pine and honey locust. Gall midges can induce rounded
stem and leaf galls or ridgelike vein galls.
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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