Abstract
Thirteen simple phenols and 8 phenolic acids were tested for toxicity to Culex quinquefasciatus larvae and Musca domestica adults. It was found that while the phenolic acids (except salicylic acid) showed little or no effect on acute toxicity, all the tested simple phenols caused mortality within 24 h after application. Lethal doses for acute toxicity of C. quinquefasciatus were successfully estimated for 12 substances using probit analysis. Thymol, carvacrol, 2-ethylphenol, and salicylaldehyde showed significantly the highest efficiency, for which the lethal doses LD(50) were estimated as 30, 36, 38, and 43 μg/ml, respectively. Lethal doses for acute toxicity of M. domestica adults were successfully estimated for ten substances. Thymol, carvacrol, and 2,6-dimethoxyphenol showed significantly the highest efficiency, for which the lethal doses LD(50) were estimated 53, 69, and 87 μg/fly, respectively.
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