A laboratory experiment was conducted to investigate the effect of pH on the persistence and the dissipation of the new readymix formulation of bispyribac sodium and metamifop. The experiment was conducted in water of three different pH viz. 4.0, 7.0 and 9.2. The spiking level of both the compounds in water was 1.0 and 2.0 µg/mL. The residues were extracted by a simple, quick and reliable method and quantified by liquid chromatography tandem mass spectrometry (LC–MS/MS). The method was justified based on the recovery study, which was > 85%. The dissipation of both compounds followed first order kinetics. The half-life values ranged between 19.86–36.29 and 9.92–19.69 days for bispyribac sodium and metamifop, respectively. The pH of water has a prominent effect on degradation of both the compounds. The rate of dissipation of both the compounds was highest in water of acidic pH followed by neutral and alkaline pH.
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APVMA, Australian pesticides and veterinary medicines authority (2011) On the evaluation of the new active bispyribac sodium in the product nominee herbicide, Product Number 63233
DeYang K, Shi LL, Dan ZJ, Wu WZ (2011) Residue and degradation of metamifop in paddy field. J Ecol Rural Environ 27:104–107
Ding G, Li X, Zhang F, Chen J, Huang L, Qiao X (2009) Mechanism-based quantitative structure activity relationships on toxicity of selected herbicides to Chlorella vulgaris and Raphidocelis subcapitata. Bull Environ Contam Toxicol. https://doi.org/10.1007/s00128-009-9811-8
European Food Safety Authority (2010) Conclusion on the peer review of the pesticide risk assessment of the active substance bispyribac (unless otherwise stated all data evaluated refer to the variant bispyribac-sodium). EFSA J 8(10):1692. https://doi.org/10.2903/j.efsa.2010.1692
IUPAC (2009) Agrochemical information. http://agrochemicals.iupac.org. Accessed 20 Apr 2009
Kookana RS, Baskaran S, Naidu R (1998) Pesticide fate and behavior in Australian soils in relation to contamination and management of soil and water: a review. Aust J Soil Res 36:715–764
Moon JK, Kim JH, Shibamoto T (2010) Photo degradation pathways and mechanisms of the herbicide metamifop in a water/acetonitrile solution. J Agric Food Chem 58:12357–12365
Nie Z, Hang B, Cai S, Xie X, He J, Li S (2011) Degradation of cyhalofopbutyl(CyB) by Pseudomonas azotoformans strain QDZ-1 and cloning of a novel gene encoding CyB-hydrolyzing esterase. J Agric Food Chem 59:6040–6046
SANCO (2013) Guidance document on analytical quality control and validation procedures for pesticide residues analysis in food and feed. European Commission. Document No. SANCO/12571/2013
Sarkar MA, Biswas PK, Roy S, Kole RK, Chowdhury A (1999) Effect of pH and type of formulation on the persistence of lmidacloprid in water. Bull Environ Contam Toxicol 63:604–609
US Environmental Protection Agency (2001) Environmental fate and ecological risk assessment for the registration of bispyribac sodium. Washington DC: Environmental fate and effects division
Zavala MAL, Funamizu N, Takakuwa T (2004) Temperature effect on aerobic biodegradation of feces using sawdust as a matrix. Water Res 38:2406–2416
Zhang CZ, Zhang ZY, Liu XJ, Jiang W, Wu YD (2010) Dissipation and environmental fate of herbicide H-9201 in carrot plantings under field conditions. Food Chem. https://doi.org/10.1016/j.foodchem.2009.07.036
We are grateful to PI Industries Ltd., Gurgaon, India for financial assistance. The infrastructure facilities provided by the Export testing Laboratory (NABL accredited ISO 17025 certified Laboratory), Department of Ag. Chemicals, Bidhan Chandra KrishiViswavidyalaya, are thankfully acknowledged.
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Saha, S., Majumder, S., Das, S. et al. Effect of pH on the Transformation of a New Readymix Formulation of the Herbicides Bispyribac Sodium and Metamifop in Water. Bull Environ Contam Toxicol 100, 548–552 (2018). https://doi.org/10.1007/s00128-018-2269-9
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