Hydrolytic biodegradation of chlorothalonil in the soil and in cabbage crops |
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Authors: | Jean Rouchaud Pascal Roucourt Alfons Vanachter Frans Benoit Norbert Ceustermans |
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Institution: | 1. Laboratoire de Phytopathologie , Université Catholique de Louvain , Louvain‐la‐Neuve, Belgium;2. Laboratorium voor Fytopathologie en Plantenbescherming , Katholieke Universiteit van Leuven , Leuven‐Heverlee, Belgium;3. Proefstation voor de Groenteteelt , St. Kathelijne‐Waver, Belgium |
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Abstract: | Broccoli and Chinese cabbage crops were treated at planting by pouring an emulsion of the fungicide chlorothalonil around the stem of the plant. During culture, chlorothalonil was biodegraded in soil into l,3‐dicarbamoyl‐2,4,5,6‐tetrachlorobenzene (compound 1), l,3‐dicyano‐4‐hydroxy‐2,5,6‐trichlorobenzene (compound 2), and l‐carbamoyl‐3‐cyano‐4‐hydroxy‐2,5,6‐trichlorobenzene (compound 3). Compounds 1 and 2 were the major metabolites in soil. In the harvested broccoli (in the flower) and Chinese cabbages (the leaves), the concentrations of chlorothalonil and of compounds 1 and 2 were lower respectively than 0.1, 0.1 and 0.5mg/kg fresh weight. |
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Keywords: | Broccoli Chinese cabbage crops chlorothalonil |
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