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19 pesticides including 12 insecticides, 2 herbicides and 5 fungicides have been tested for mutagenic activity in the Salmonella/microsome system. It was found that insecticides, DDVP, Trichlorfon, Sumithion, Naled, fungicide, TMTD and herbicide NIP induced base substitute mutation and herbicide MO frameshift mutation. Mutagenicity of Sumithion and NIP was appeared only after rat microsomal enzyme activation and that of TMTD was increased after the microsomal enzyme activation.
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