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The green-bug or spring grain-aphis : how to prevent its periodical outbreaks


Author:
Walton, William Randolph
Source:
USDA
Year:
1921
Subject:
Greenbug, Control, Grain, Diseases and pests, life history, parasitoids, grain crops, Lysiphlebus testaceipes, Schizaphis graminum, biological control agents, grains, and natural enemies
Language:
English
Publisher:
U.S. Dept. of Agriculture
Series:
Farmers' bulletin (United States. Department of Agriculture) ; no. 1217
Collection:
Organic Roots Collection
Permanent URL:
http://handle.nal.usda.gov/10113/33485