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Degradation of the fungicide difenoconazole in a silt loam soil as affected by pretreatment and organic amendment

Degradation of the fungicide difenoconazole in a silt loam soil as affected by pretreatment and organic amendment,10.1016/S0269-7491(97)00037-7,Enviro

Degradation of the fungicide difenoconazole in a silt loam soil as affected by pretreatment and organic amendment   (Citations: 7)
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Degradation of the fungicide difenoconazole was examined in a silt loam soil under controlled conditions (60% WHC, 30°C) in the laboratory. Difenoconazole was applied at 0.1 and 1.0 mg kg−1 dry soil, respectively. The experiments were run with non-pretreated and pretreated field soil, respectively, partly mixed with easily decomposable organic matter (leaf powder). In all experiments, degradation curves showed a sigmoidal shape with clear acclimation phases. Pretreatment with difenoconazole in the field decreased the acclimation phases, DT50- and, in some cases, DT90-values. The incorporation of easily decomposable organic matter decreased both DT50- and DT90-values and increased the general microbial activity significantly. We conclude that difenoconazole is metabolized by an acclimated part of the soil microflora. However, the degradation seems to be stimulated in the presence of suitable co-substrates.
Journal: Environmental Pollution - ENVIRON POLLUT , vol. 96, no. 3, pp. 409-414, 1997
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