Spraying experiments against the grape leaf hopper [Tychlocyba comes Say] in the Lake Erie Valley in 1911.
By: By Fred Johnson...
Series: U.S. Dept. of agriculture. Bureau of entomology. Bulletin; no. 116, pt. 1. Papers on deciduous fruit insects and insecticides.
Publisher: Govt. print. off.
Published: 1912
Place of publication: Washington
Language: eng
Number of pages: 13
Subjects: Grape leaf-hopper.; Spraying.