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1965•Journal of Economic EntomologyRequires access

Resistance to Three Organophosphorus Insecticides in Strains of the German Cockroach from Texas1

James McDonald Grayson

Open publisher page 6 citations

Abstract

In 1963 some pest-control operators in Texas experienced failures in controlling German cockroaches, Blattella germanica (L.), with insecticides that had previously given satisfactory control. Five strains from 3 locations were tested in the laboratory and compared with a normal strain for determination of level of resistance. At LC50 the times resistances were: to diazinon 2.5–6.3; to fenthion 2.7–5.0; and to malathion 2.2–12.8. At LC90 the values were: to diazinon 2.9–8.2; to fenthion 3.2–9.9; and to malathion 1.9–26.7.

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What this paper is about

In 1963 some pest-control operators in Texas experienced failures in controlling German cockroaches, Blattella germanica (L.), with insecticides that had previously given satisfactory control. Five strains from 3 locations were tested in the laboratory and compared with a normal strain for determination of level of resistance. At LC50 the times resistances were: to diazinon 2.5–6.3; to fenthion 2.7–5.0; and to malathion 2.2–12.8. At LC90 the values were: to diazinon 2.9–8.2; to fenthion 3.2–9.9; and to malathion 1.9–26.7.

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Available abstract

In 1963 some pest-control operators in Texas experienced failures in controlling German cockroaches, Blattella germanica (L.), with insecticides that had previously given satisfactory control. Five strains from 3 locations were tested in the laboratory and compared with a normal strain for determination of level of resistance. At LC50 the times resistances were: to diazinon 2.5–6.3; to fenthion 2.7–5.0; and to malathion 2.2–12.8. At LC90 the values were: to diazinon 2.9–8.2; to fenthion 3.2–9.9; and to malathion 1.9–26.7.

Key concepts: Diazinon, Fenthion, Malathion, German cockroach, Toxicology, Biology, Cockroach, Propoxur

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Resistance to Three Organophosphorus Insecticides in Strains of the German Cockroach from Texas1 — Research Paper | ScholarLens