John Wiley & Sons, Ltd.

Soil genotoxicity induced by successive applications of chlorothalonil under greenhouse conditions

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Greenhouse production of vegetables has been developed rapidly in China. High temperature and humidity inside the greenhouse make this environment more suitable for fast reproduction of fungal diseases. Fungicides are among intensively used chemicals in the greenhouse to prevent crops from the invasive infection of phytopathogen, however, little is known about accumulation of fungicides in soil and its effect on soil quality under greenhouse conditions. In this study the accumulation of fungicide chlorothalonil (CT) and its toxic metabolite hydroxy‐chlorothalonil (HCT) in soil as well as their related soil genotoxicity under greenhouse conditions was investigated. The results indicated that both CT and HCT accumulated in soil with repeated applications of CT and the accumulation level was strongly correlated to application dosage and its frequency. In addition, soil genotoxicity, which was measured by Vicia faba, also increased with the accumulation of CT and HCT and the main contributor for this phenomenon was CT rather than HCT. The data demonstrated that successive applications of fungicides may result their accumulation in soil and thus declining soil quality. Environ Toxicol Chem © 2014 SETAC

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