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Effect of Moisture, Organic Matter, Microbial Population and Fortification Level on Dissipation of Pyraclostrobin in Soils

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Abstract

The dissipation of pyraclostrobin, a strobilurin fungicide, in soil was found to be influenced by soil moisture, organic matter content and microbial population. Among the different moisture regimes, dissipation was faster under submerged condition (T1/2 10 days) followed by field capacity (T1/2 28.7 days) and in dry soil (T1/2 41.8 days). Use of sludge at 5 % level to Inceptisol favoured a faster dissipation of pyraclostrobin, whereas a slower rate of dissipation was observed in partial organic matter removed soil as compared to normal soil. Slower rate of dissipation was also observed in sterile soil (T1/2 47 days) compared to normal soil. Pyraclostrobin dissipated faster in Vertisol (T1/2 21.8 days) than in Inceptisol (T1/2 28.7 days). No significant difference in the dissipation rate was observed at 1 and 10 μg g−1 fortification levels.

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Acknowledgments

The authors thank The Head, Division of Agricultural Chemicals and Division of Soil Science and Agricultural Chemistry, IARI, New Delhi for all required infrastructure; and ICAR for financial help in the form of JRF Fellowship.

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Correspondence to Suman Gupta.

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Reddy, S.N., Gupta, S. & Gajbhiye, V.T. Effect of Moisture, Organic Matter, Microbial Population and Fortification Level on Dissipation of Pyraclostrobin in Soils. Bull Environ Contam Toxicol 91, 356–361 (2013). https://doi.org/10.1007/s00128-013-1045-0

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  • DOI: https://doi.org/10.1007/s00128-013-1045-0

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