A research was conducted at Division of Agronomy, JAU, Junagadh on medium black calcareous soil in two kharif seasons to judge the bioefficacy of Pre-and PoE herbicides in groundnut and determination of their residues in treated soil. The herbicides residue were analyzed in soil at 30, 60 days crop stage, at harvest and at 30 DAH of the crop. Soil samples were analysed for pendimethalin, oxyfluorfen and quizalofop-ethyl with the help of QuEChERS process in GC-MS and for imazethapyr in LC-MS/MS. The average recovery ranges from 85.60 to 95.50% at three spike levels viz., 0.1, 0.25 and 0.5 μg/g). The lowest detectable limit (BDL) of pendimethalin and quizalofop-ethyl in field soil was 0.01 µg g-1. The value for oxyfluorfen and imazethapyr were 0.015 and 0.008 µg g-1, respectively. The analytical marks revealed that residues of pendimethalin, oxyfluorfen and quizalofop-ethyl in soil were detected up to 30 days crop stage while the remains of imazethapyr in soil samples were not detected till harvest. The farmers are advised to adhere with the recommended dosage of these herbicides application to minimize the soil and water pollution threats

Analysis, extraction, imazethapyr, oxyfluorfen, pendimethalin, quizalofop-ethyl, soil persistence

On two-year field experimentation (2013-2014), it is summarised that higher groundnut production with efficient weed control in kharif groundnut under South Saurashtra region can be achieved by treating the crop with pendimethalin 0.9 kg ha–1 PE fb IC & HW at 40-45 DAS or pendimethalin 0.9 kg ha–1 PE fb quizalofop-ethyl 40 g ha–1 POE at 20-25 DAS without any herbicidal residues risk to human beings as well as to the environment and rotational crops. These herbicides were found safe for rotational crops in groundnut based cropping system (Mehriya et al., 2020). Persistence of pendimethalin, oxyfluorfen and quizalofop-ethyl in soil detected up to 30 days crop growth. At other sampling stages the applied herbicides residue were found below the hazardous limits (BDL).

Poonia T.C. and Mathukia R.K. (2023). Principles and Procedures of Herbicides Residue Estimation in Groundnut Cultivated Soils of Saurashtra Region. Biological Forum – An International Journal, 15(12): 529-532.