Monika1*, Anil Duhan1 and Rakesh Kumar2
1Department of Chemistry, CCS Haryana Agricultural University, Hisar-125004, 2CCS Haryana Agricultural University, College of Agriculture, Bawal (Rewari)-123501
Email: monuloura97@gmail.com
Received-10.05.2024, Revised-05.06.2024, Accepted-21.06.2024
Abstract: A laboratory experiment was undertaken to investigate the persistence of ethalfluralin (35 EC) at recommended and double dose in Inceptisol soil. To carry out this study, surface soil samples (0-15 cm) were collected from experimental farm of Krishi Vigyan Kendra, Fatehabad (Haryana) in year 2021 and processed for initial soil physico-chemical properties analysis. Also separately, 2 kg of Inceptisol soil in pots along with a control in which no herbicide was added was taken for study. During experimental period pots were kept at room temperature of 25 ± 2ºC and field capacity moisture level. 20 g of soil samples were drawn in triplicate and analyzed periodically after 0 (1 hr), 1, 3, 7, 10, 15, 30, 45, 60, 90 and 120 day after treatment (DAT). The soil samples were further processed and 20 g representative soil was taken as test sample and processed for residue analysis. For improved extraction and cleanup various techniques were optimized and maximum recovery of ethalfluralin was obtained in MSPD without florisil at three fortification levels. Residues of ethalfluralin reached below detectable limit after 90 and 120 DAT at recommended and double dose, respectively. Half-life of ethalfluralin ranged from 38-42.1 days. Slightly more persistence was observed at double dose as compared to recommended dose. Faster dissipation was observed upto 10 days and that might be due to microbial degradation.
Keywords: Inceptisol, Florisil, Herbicide, Dissipation, Soil
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