Sex identification of adults and pupae of a birch defoliator, Pheumaptera hastata, in interior Alaska
By: by Richard A. Werner
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: USDA Forest Service research note PNW ; 275
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Nothwest Forest and Range Experiment Station
Published: 1976
Place of publication: Portland, Or
Language: eng
Subjects: Birch -- Diseases and pests
Notes: Bibliography: p. 4