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Plant bugs, leafhoppers, and spider mites are common pests on honeylocust. Heavy infestations of any of these insects can cause significant damage to the tree, however all are easily controllable. Plant bugs cause yellow or brown spotting on the leaves, leaves become twisted and twig dieback can occur during heavy infestations. New foliage is particularly favored by the plant bug and during heavy infestations, plant bugs will consume the foliage before it has a chance to expand. The infested tree appears to be very late in leafing out compared to pest-free trees. To learn more see the attached information sheet.