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A Comparative Study of Certain Biological Phenomena Detected in a Parathion-Treated Strain and a Susceptible Strain of the Plum Curculio, Conotrachelus nenuphar

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An investigation was conducted to study the development of resistance to parathion, the cross tolerance responses of the resistant strain to certain toxicants, and biological differences between a laboratory reared resistant strain and a susceptible strain of the plum curculio, Conotrachelus nenuphar (Herbst).

A strain was selected for resistance to parathion by applying this chemical topically to the insects. The susceptibility of the resistant-selected strain to parathion was determined by topical application to each generation for seven generations and cross tolerance of the strain to other toxicants was determined for the third and seventh generations. Insecticides used were parathion, Guthion® (O,O-dimethyl S-(4-oxo-1, 2,3,-benzotriazin-3(4H)- ylmethyl) phosphorodithioate), dieldrin, and Sevin® (1-naphthyl N-methyl carbamate) representing two phosphates, a chlorinated hydrocarbon and a carhamate insecticide, respectively. There was a slow irregular increase in tolerance to parathion. The re-

Document Type: Research Article

Publication date: December 1, 1963

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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