The interaction between pesticides affects the persistence of fungicides and insecticides in the environment, and even the use of the interaction of the soil microorganism. In this study, the effect of mix application of two fungicides, carbendazim and thiophanate-methyl, with three insecticides, malathion, carbaryl and fenvalerate on persistent of these pesticides on soil was investigated. From the result, the carbendazim degradation rate is not significantly different between single and mixed treatments in Pu soil. In addition, the study also investigate the mixed fungicides pesticides in soil degradation on the impact of insecticides in soil degradation. The carbaryl and fenvalerate degradation rate increased in mixed treatments. The thiophanate-methyl metabolite carbendazim was detected. The metabolites produced amount weren't equal to the thiophanate-methyl degraded amount. The result indicated that thiophanate-methyl may degrade to other metabolites in experimental period. Thus there are assessment when applying fungicides with insecticides simultaneously in soils.

Effects of fungicide and insecticide mixed application on their degradation in soils

248th National Meeting (2014)

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