Papers on deciduous fruit insects and insecticides. Vineyard spraying experiments against the rose-chafer in the Lake Erie Valley.

By Johnson, Fred..
Washington, Govt. print. off., 1911 .
iv p., p. 53-64. 23 cm..

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Papers on deciduous fruit insects and insecticides. Spraying experiments against the grape leafhopper in the Lake Erie Valley in 1911 /

By Johnson, Fred R..
Washington : Govt. Print. Off., 1912 .
iii, 13 p., [3] leaves of plates : , From: U.S. Bureau of Entomology bulletin, no. 116, pt. 1. 23 cm..

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Papers on deciduous fruit insects and insecticides. Vineyard spraying experiments against the rose-chafer in the Lake Erie Valley.

Papers on deciduous fruit insects and insecticides. Spraying experiments against the grape leafhopper in the Lake Erie Valley in 1911 /