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Chemical Degradation of Sulfosulfuron in Aqueous Suspension of Rice and Wheat Straw Ashes

Abstract

Burning of wheat and rice straw on field, after crop harvest, is a quick, cheap and an easy way for land clearing. The ashes generated after burning are mixed with soils and due to their alkaline nature, they may affect the degradation of applied herbicides. Therefore, present paper reports degradation of sulfosulfuron in aqueous suspension of the wheat (WSA) and rice (RSA) straw ashes. The results suggested that both ashes significantly enhanced sulfosulfuron dissipation in water and effect was more with the RSA. The solution pH affected sulfosulfuron dissipation and in control buffers (no ash) herbicide degradation followed the order: acidic > alkaline > neutral. Addition of the RSA significantly increased sulfosulfuron degradation in buffers, but effect was more evident at neutral and alkaline pH. The study has relevance in assessing degradation of sulfosulfuron in soils where crop residues are burned for land clearing.

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Correspondence to Neera Singh.

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Kumar, A., Singh, N., Banerjee, T. et al. Chemical Degradation of Sulfosulfuron in Aqueous Suspension of Rice and Wheat Straw Ashes. Bull Environ Contam Toxicol 103, 484–489 (2019). https://doi.org/10.1007/s00128-019-02686-y

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Keywords

  • Sulfosulfuron
  • Rice and wheat straw ashes
  • Degradation