Alnus (alder)
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Enlarged bud...Dasineura serrulatae (Osten Sacken)
Affected buds are 6β12 mm in diameter. Each contains several reddish larvae that drop to the soil in fall...Hosts: A. crispa, A. rugosa, A. serrulata. Distr.: Massachusetts and Ontario to North Carolina
β- Raymond J. Gagne: (1989) The plant-feeding gall midges of North AmericaΒ©