European snout weevil defoliation. In spring, look for notch feeding along leaf edges. They are sometimes quite active, dropping from foliage onto other surfaces and entering homes. There is one generation per year. Eggs are laid in the soil in midsummer, and larvae feed and develop on roots.
Winter is spent in the soil as a mature larva.
Weevils disappear by midsummer. Control is not usually warranted. Drooz, A.T. 1985. Insects of Eastern Forests . USDA Forest Service Miscellaneous Publication 1426.