Development of western spruce budworm on Douglas-fir callus tissue
By: Roy C. Beckwith and Barry Goldfarb.
Contributors: Goldfarb, Barry.; Pacific Northwest Research Station (Portland, Or.)
Series: Research note PNW -- RN-504.; Research note PNW -- 504.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
Published: 1991
Place of publication: [Portland, Or. (319 S.W. Pine St., Portland 97208)]
Language: eng
Subjects: Western spruce budworm -- Northwestern States.; Douglas fir -- Diseases and pests -- Northwestern States.
Notes: Caption title.

Distributed to depository libraries in microfiche.

"June 1991."

Includes bibliographical references (p. 4-5).