Fifteenth Report of the State Entomologist on the Noxious and Beneficial Insects of the State of Illinois: Fourth Report of S. A. Forbes, for the ... for the Year 1885 and 1886 (Classic Reprint) - Softcover

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Excerpt from Fifteenth Report of the State Entomologist on the Noxious and Beneficial Insects of the State of Illinois<br/><br/>Furthermore, du1ing 1886 seventy-four per cent. Was saved from falling, by a single spraying, and about seventy two per cent. By three sprayings. The difference unfavorable to the last was doubt less due to accidental differences in trees and treatment.

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