When permethrin was tested for mutagenicity in Drosophila melanogaster Meigen with the sex-linked recessive lethal test, it was nonmutagenic under conditions of this study. The frequencies of spontaneous mutation for permethrin and the negative control were 0.135% and 0.133%, respectively; the spontaneous mutation frequency for positive control was 12.6%. The difference between the mutation frequency of permethrin and the negative control was not significant.
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