Dr. P. G. ShahChaudhary Dilipkumar G.2021-07-122021-07-122019https://krishikosh.egranth.ac.in/handle/1/5810170406The field experiment was conducted on “Bio-efficacy and persistence of diclosulam and sulfentrazone in sandy loam soil under soybean cultivation” during the kharif seasons for two years 2016-17 and 2017-18 at AICRP on Weed Management farm, Anand Agricultural University, Anand (Gujarat). The experiment was laid out in a Randomized Block Design with pre-emergence sprays of diclosulam (84% WG) @ 26 and 52 g a.i. ha-1, and sulfentrazone (39.6% SC) @ 360 and 720 g a.i. ha-1. An in vitro experiment was carried to study the persistence of diclosulam and sulfentrazone in sandy loam soil. The experiment was carried out at AINP on pesticide residues ICAR, Unit-9 AAU, Anand (Gujarat) in June, 2018. The polypropylene tubes containing sandy loam soil (10 g) were fortified with the mixture of diclosulam and sulfentrazone @1mg kg-1. The polypropylene tubes containing spiked soil were kept under control conditions. Samples were processed on 0 (1 hour), 1, 3, 5, 10, 20 and 30 days after treatment and analyzed for the residues of diclosulam and sulfentrazone by an in-house developed method utilizing QuEChERS approach.EnglishThesis