Willow beaked-gall midge
11 host plants
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Willow beaked-gall midge larvae induce reddish, cone-shaped galls on willow branches and twigs. You will see clusters of galls at branch tips, particularly on Scouler willow and other species in western Washington riparian areas. Galls may be numerous on young trees, distorting branch appearance. Interior larval chambers become visible when galls split open in fall.
Prune galled branches in winter dormancy, well below the visible galls, and burn or bury material to eliminate pupae. Young trees tolerate gall removal and recovery is rapid. Most galls are non-threatening to mature willow health and require no intervention. Natural parasitoid wasps suppress midge populations; do not use pesticides.
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Host Plants
11
Host Plants (11)
Quercus phellos Willow, Oak Salix alba Salix alba Salix babylonica Weeping Willow Salix caprea Salix caprea Salix integra Salix integra Salix magnifica Magnolia-leaf Willow, Magnificent Willow Salix matsudana Salix matsudana Salix pentandra Laurel, Willow, Bay Willow Salix phlebophylla Skeletonleaf Willow Salix purpurea Purpleosier Alaska Blue Willow Salix scouleriana Scouler's Willow