The spring grain-aphis or so-called "green bug." (Toxoptera graminum Rond.)
By: By F.M. Webster ...
Series: U.S. Dept. of Agriculture. Bureau of Entomology. Circular -- no. 93, rev
Publisher: Govt. Print. Off.
Published: 1909
Place of publication: Washington
Language: eng
Number of pages: 22
Subjects: Greenbug
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