Sampling populations of western spruce budworm and predicting defoliation on Douglas-fir in eastern Oregon
By: V.M. Carolin and W.K Coulter.
Contributors: Coulter, W. K.
Series: Research paper PNW -- 149.; Research paper PNW -- 149.
Publisher: Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service
Published: 1972
Place of publication: Portland, Or
Language: eng
Number of pages: 38
Subjects: Western spruce budworm -- Oregon; Douglas fir -- Diseases and pests -- Oregon; Insect populations -- Oregon
Notes: Cover title.

Bibliography: p. 36-38.