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Papers on deciduous fruit insects and insecticides. Vineyard spraying experiments against the rose-chafer in the Lake Erie Valley. By FredJohnson ... by Series: U.S. Dept. of agriculture. Bureau of entomology. Bulletin ; no. 97, pt. III
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington, Govt. print. off., 1911
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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 Fred Johnson. by Series: United States. Bulletin ; no. 116, pt. 1.
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington : Govt. Print. Off., 1912
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  • Spraying experiments against the grape leafhopper in the Lake Erie Valley in 1911
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