Spraying for aphids
By: by Frank H. Lathrop.
Contributors: Oregon Agricultural College. Extension Service.
Series: Cir -- 115.; Circular (Oregon Agricultural College. Extension Service) -- 115.
Publisher: Oregon Agricultural College, Extension Service
Published: 1918
Place of publication: Corvallis, OR
Language: eng
Subjects: Aphididae -- Control.
Notes: Caption title.

"May 13, 1918."