Abstract
The persistence and dissipation of a new readymix formulation of halauxifen-methyl + pyroxsulam was investigated in three soils viz. red lateritic (Soil A), coastal saline (Soil B) and black soil (Soil C) under three incubation temperatures (20, 30 and 40° C). Soil samples were fortified at 1.0 (T1) and 2.0 (T2) mg kg− 1 doses separately for both compounds. The analytical methods showed satisfactory mean recovery, precision and linearity and therefore accepted for analysis. Both molecules followed single first-order kinetics. A significant influence of soil type on the persistence of both herbicides was observed. The order of stability of halauxifen-methyl was Soil A > B > C and for pyroxsulam was Soil B > C > A. Besides, a faster rate of dissipation of halauxifen-methyl and pyroxsulam was recorded at elevated temperatures, regardless of soil type. This research will help to understand the effect of temperature on the fate of the herbicide mixture in soils of diverse agro-climatic regions.
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The authors are thankful to the Export Testing Laboratory (NABL accredited ISO/IEC 17025: 2005 certified), Bidhan Chandra Krishi Viswavidyalaya for extending the infrastructure facilities. The authors are also thankful to the Dow AgroSciences India Pvt. Ltd. for providing reference materials of the active ingredients and the formulation.
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Singha, D., Das, S., Bhowmick, N. et al. Impact of soil type and temperature on dissipation dynamics of a new readymix formulation of halauxifen-methyl + pyroxsulam. Bull Environ Contam Toxicol 109, 373–378 (2022). https://doi.org/10.1007/s00128-022-03542-2
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DOI: https://doi.org/10.1007/s00128-022-03542-2