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Resistance spectrum and subgrouping of organophosphorus compounds in a field population of the Egyptian cotton leaf-worm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)



Resistance spectrum and subgrouping of organophosphorus compounds in a field population of the Egyptian cotton leaf-worm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)



Bulletin of the Entomological Society of Egypt, Economic Series 1979 recd 1981; (9): 147-155



The resistance to various organophosphorus insecticides of a strain of the cotton pest Spodoptera littoralis (Boisd.) from Dakahlia Governorate, Egypt, was determined in laboratory tests during 1969-73. LD50s of topical applications were determined for larvae 8 days old. Resistance varied according to the type of compound, there being 4 major types. Resistance was generally greater to compounds with methyl configurations than to those with ethyl configurations.

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Accession: 000969944

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