Aphid & mite control on hops.
Series: Extension mimeo -- 3938.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 3938.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1975
Place of publication: Pullman
Language: eng
Notes: Caption title.

"By Wyatt W. Cone and Donald A. Chaplin"--P. 5.

"May 1975"--P. [1].

"EM 3938"-- P. [1].