Answer: Honeylocust (Bleditsia triacanthos) can be attacked by Honeylocust pod gall midge (Dasineura gledichiae). It's a tiny midge, or fly, that develops in the leaves, deforming them. They're hard to control because there are multiple generations each year, with new insects hatching out in as little as 3-4 weeks apart. The key to successful management is protection of new foliage with insecticde. Sometimes repeat applications are needed, as often as every 2-4 weeks, beginning in spring. The most effective insecticides contain either chlorpyrifos or cyfluthrin, and these are restricted use insecticides in Washington and Oregon. The trees can probably be saved with an intensive spray program, but it can be rather expensive and not something a homeowner can do. Why not contact another tree service for a second opinion and an estimate for control of the insects?
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