The spotted alfalfa aphid
Subtitle: how to control it
Series: Leaflet / United States Department of Agriculture -- no. 422; Leaflet (United States. Dept. of Agriculture) -- no. 422.
Publisher: U.S. Dept. of Agriculture
Published: 1957
Place of publication: Washington, D.C
Language: eng
Subjects: Spotted alfalfa aphid; Control; Alfalfa; Diseases and pests