Control of aphids on alfalfa in the Antelope Valley, Calif
By: by R.A. Blanchard
Series: Circular / United States Department of Agriculture -- no. 307; Circular (United States. Dept. of Agriculture) -- no. 307.
Publisher: U.S. Dept. of Agriculture
Published: 1934
Place of publication: Washington, D.C
Language: eng
Subjects: Control; Pea aphid; Alfalfa; Diseases and pests
Notes: Caption title.

"Contribution from Bureau of Entomology."