Aphid and adelgid pests of conifers in Oregon
By: J.D. DeAngelis.
Contributors: Oregon State University. Extension Service.
Series: EC -- 1444.; Extension circular (Oregon State University. Extension Service) -- 1444.
Publisher: Oregon State University Extension Service
Published: 1994
Place of publication: [Corvallis, Or.]
Language: eng
Subjects: Conifers -- Diseases and pests -- Oregon.; Plant-lice -- Oregon.; Adelgidae -- Oregon.
Notes: Title from caption.

"November 1994."

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