European Snout Beetle
Hosts: Sugar and mountain maples, yellow birch, elm and serviceberry are particularly damaged, but the beetles also feed on many other hardwoods and softwoods
Evidence: In spring, look for notch feeding along leaf edges. Adult weevils, which are brown and 4-5 mm long, may appear in large numbers at that time (a). They are sometimes quite active, dropping from foliage onto other surfaces and entering homes.
Life Cycle: 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. Adults appear in spring, and feed along leaf margins (b).
Management: Weevils disappear by midsummer. Control is not usually warranted.
Figure a: E. Bradford Walker, Vermont Department of Forests, Parks and Recreation, Waterbury, VT.
Figure b: Ronald S. Kelley, Vermont Department of Forests, Parks and Recreation, Morrisville, VT.
Drooz, A.T. 1985. Insects of Eastern Forests. USDA Forest Service Miscellaneous Publication 1426. p 320;
Johnson, W.T. and Lyon, H.H. 1991. Insects That Feed on Trees and Shrubs. 2nd edition. Cornell University Press. p 244;
Rose, A.H. and Lindquist, O.H. 1982. Insects of Eastern Hardwood Trees. Canadian Forest Service Publication, Forestry Technical Report 29. p 129.