Effect of Soil Type and Temperature on Persistence and Dissipation Kinetics of a New Readymix Formulation of Fomesafen + Quizalofop-ethyl

• Published in: Bulletin of environmental contamination and toxicology Vol. 107; no. 5; pp. 961 - 966
• Main Authors: Das, Sushovan, Singha, Debasish, Kundu, Arnab, Kundu, Abhishek, Bhattacharyya, Arijita, Nanda, Manoj Kumar, Roy, Sankhajit
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2021; Springer Nature B.V
• Subjects: Aquatic Pollution; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Half-life; Herbicides; Kinetics; Pollution; Saline soils; Soil Science & Conservation; Soil stability; Soil temperature; Soil types; Soils; Temperature effects; Waste Water Technology; Water Management; Water Pollution Control; Soil; Temperature; Fomesafen; Half-life; Quizalofop-ethyl
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-021-03375-5

The research portrays the fate of a new herbicide mixture of fomesafen and quizalofop-ethyl. The soil samples viz. red lateritic soil (A), coastal saline soil (B) and black soil (C) were fortified separately for fomesafen and quizalofop-ethyl at 0.5 (T1) and 1.0 mg kg −1 (T2) doses and incubated at 20, 30 and 40°C. A satisfactory mean recovery, precision and linearity proved that the methods were accurate. Both the herbicides followed first + first order kinetics. Higher persistence of fomesafen was observed in Soil C than Soil B and Soil A with 22.38–53.75 days half-life, whereas quizalofop-ethyl showed higher stability in Soil A than Soils B and C with half-life of 0.93–12.07 days. Both compounds showed faster rates of dissipation at increased temperature, irrespective of soil type. The current study will help to predict the effect of temperature on the dissipation of herbicides in different soil under real field scenario.