Abstract
Adult house flies, Musca domestica L., treated topically with Baygon® ( o -isopropoxyphenyl methyicarbamate), Banol® (6-chloro-3,4-xylyl methyicarbamate), and carbaryl were most resistant to these chemicals when 5 days old. Susceptibility was greatest in adults 1 and 15 days old. Neither total cholinesterase activity nor its sensitivity to the insecticides, varied sufficiently in flies of different ages to explain the mortality data. Rates of penetration and excretion of carbaryl-C14 were not related to the mortality changes. However, in vivo inhibition of cholinesterase did correlate with the observed toxicity of the carbonates to adult house flies, suggesting that accumulation of the toxicant at the site of action varied in insects of different ages.
Published Version
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