Infestation characteristics of the balsam woolly aphid in the Pacific Northwest
By: by Russel G. Mitchell.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research paper PNW -- 35.; U.S. Forest Service research paper PNW -- 35.
Publisher: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1966
Place of publication: [Portland, Or.]
Language: eng
Number of pages: 18
Subjects: Fir -- Diseases and pests -- Northwest, Pacific; Adelges -- Northwest, Pacific
Other titles: Balsam woolly aphid.
Notes: Cover title.

Bibliography: p. 17-18.