Insect of the Month: Gall-Making Insects

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vein pocket galls on red oak leaves. Photo by Mike Merchant

Vein pocket galls on the underside of southern red oak leaves, Quercus schumardii, are caused by a tiny midge fly. Numbers of these midges in some years can be severe enough to cause noticeable aesthetic damage to trees–unusual for most galls. Photo by Mike Merchant

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