Laboratory and Field Tests of New Insecticides for Grasshopper Control

1 February 1961

journal article
research article
Published by Oxford University Press (OUP) in Journal of Economic Entomology

Vol. 54 (1) , 170-174
https://doi.org/10.1093/jee/54.1.170

Abstract

New insecticides were evaluated for grasshopper control on rangeland in Western United States. The most effective of laboratory-screened compounds were field tested on 1½-acre plots with ground equipment or on 40- or 640-acre plots with aircraft. The most promising compounds from the field tests were Bayer 25141 (O, O-diethyl O-(p-methylsulfinyl)phenyl phosphorothioate), Bayer 29493 (O, O-dimethyl O-(4-methylthio-m-tolyl) phosphorothioate), Diazinon®) (O, O-diethyl O-(2-isopropyl-4-methyl-6-pyrimidinyl) phosphorothioate), Dihrom® (1, 2-dibromo-2,2-dichloroethyl dimethyl phosphate), dimethoate, General Chemicals 3707 (1,3-bis(methoxycarhonyl)-1-propen-2-yl dimethyl phosphate), malathion, Monsanto CP-7769 (hexaethyl (ethylthiomethylidyne ) triphosphonate), posphamidon, and Sevin®(1-naphthyl methylcarbamate). A discussion of the techniques of evaluating new insecticides through testing in the laboratory and in small- and large-scale plots is presented.

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