Larva - ivory with pale yellow-brown head. Dorsal surface yellowish with two brown furrows that converge at the head. Spriracles elliptical and prominent. (4)
Introduced from Europe. Alaska south through Canada and most of the United States east of the Rockies. (3), (4)
Larvae bore in the roots, low trunk, and branches of low shrubby willows (Salix) in the north and cottonwood (Populus) is prefered in the southern part of its range. Alder, birch and hawthorn are hosts in Europe but unconfirmed in North America. (3), (4)
See Solomom in Print References.
Brown, L.N. & R.F. Mizell, III 1993. The Clearwing Borers of Florida (Lepidoptera: Sesiidae). Tropical Lepidoptera 4(4): 1-21 (PDF) (3)
Solomon, J.D. 1995. Guide to insect borers in North American broadleaf trees and shrubs. USDA Forest Service Agriculture Handbook AH-706: 42-46, f.16 (Download Options) (4)
Venable, G. 1984. Journal of the Lepidopterists' Society 38(1): Cover Drawing
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