Cholinesterase Studies of a Malathion-Susceptible and a Resistant Strain of House Flies

Authors: Zettler, J. Larry; Brady, U. Eugene

Source: Journal of Economic Entomology, Volume 64, Number 5, 15 October 1971 , pp. 1034-1037(4)

Publisher: Entomological Society of America

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Abstract:

Levels of thoracic cholinesterase in malathion-susceptible and in resistant Musca domesticaL. were compared at the time of knockdown and in survivors following KD₅₀ dosages of malathion (0.6 and 950 μg per insect, respectively). Thoracic cholinesterase of malathion-resistant flies was inhibited less at knockdown and in survivors than was cholinesterase of susceptible flies. In vivo recovery of phosphorylated cholinesterase was not apparent in survivor flies at 5 days. There was 110 shift in the acetylcholine concentration-cholinesterase activity curves for heads or thoraces of resistant flies as compared with those of susceptible flies. Consequently, a higher tolerance of cholinesterase to inhibition by acetylcholine is not a factor in the resistance of this strain of house flies to malathion.

Document Type: Research article

Publication date: 1971-10-15

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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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Cholinesterase Studies of a Malathion-Susceptible and a Resistant Strain of House Flies

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