The spring grain-aphis or so-called "green bug."
Subtitle: (Toxoptera graminum Rond.)
By: F. M. Webster
Contributors: United States. Bureau of Entomology; United States. Dept. of Agriculture
Edition: Revision.
Series: Circular / U. S. Dept. of Agriculture. Bureau of Entomology -- no. 93; Circular (United States. Bureau of Entomology) -- no. 93.
Publisher: U.S. Dept. of Agriculture, Bureau of Entomology
Published: 1909
Place of publication: Washington, D.C
Language: eng
Number of pages: 22
Subjects: Agricultural pests; Grain; Toxoptera; Aphids; Greenbug; Diseases and pests
Notes: Circular No. 93, Revised.

"Issued June 23, 1909."

At head of title:  United States Department of Agriculture, Bureau of Entomology.
Table of contents: title: Distribution in the United States. pp. 1.; title: The relation of temperature to destructive outbreaks. pp. 3.; title: Food plants. pp. 5.; title: Invasion of 1907. pp. 7.; title: Development and influence of Lysiphlebus tritici. pp. 15.; title: Experiments in destroying "Green bugs" over small areas. pp. 19.; title: Agricultural methods of control. pp. 20.; title: The present "Green bug" situation in the Southern States, May 1, 1909. pp. 21.