Cross Resistance to Organophosphorus Compounds in Malathion- and Diazinon-Resistant Strains of Blattella germanica

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Dosage mortality data, obtained by a topical application method, for 8 organophosphorus compounds are given for 2 laboratory-selected strains of Blattella germanica (L.), one selected with malathion and the other with diazinon. Comparison of these data with similar data for a normal susceptible strain revealed that development of resistance to malathion in this species is highly specific, imparting essentially no cross resistance to any of the other 7 organophosphorus compounds evaluated. Selection with diazinon induced a low level of tolerance to all the organophosphates studied. There is reason to believe that if carboxyesterase activity is responsible for the resistance phenomena to malathion exhibited by this insect, its action is blocked by the presence of a vinyl group in one of the carboxyester side chains of an organophosphorus compound, such as GC 3707 (dimethyl 3- (dimethoxyphosphinyloxy) glutaconate).

Document Type: Research Article

Publication date: October 1, 1965

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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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