Spruce aphid.
Series: Insect answers; Extension mimeo -- 4322.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 4322.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1978
Place of publication: Pullman
Language: eng
Subjects: Aphids; Spruce -- Diseases and pests
Notes: Caption title.

"Roy Davidson and Arthur L. Antonelli"--P. 2.

"June 1978"--P. [1].

"EM 4322"--P. [1].