Distribution of western spruce budworm egg masses on white fir and Douglas-fir
By: J.M. Schmid and P.A. Farrar
Contributors: Farrar, P. A.; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Series: Research paper RM -- 241
Publisher: Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1982
Place of publication: Fort Collins, Colo
Language: eng
Subjects: Fir; Defoliation; Eggs; Douglas fir; Western spruce budworm; Diseases and pests
Notes: "October 1982"--T.p. verso.

Bibliography: p. 7.