Department of Entomology, Punjab Agricultural University, Ludhiana, 141004, India.
Environ Sci Pollut Res Int. 2023 Aug;30(40):91902-91914. doi: 10.1007/s11356-023-28696-2. Epub 2023 Jul 22.
Dissipation and persistence of fenazaquin residues in chilli and soil were studied for 2 years following two applications of fenazaquin at 10-day interval. The limit of detection and limit of quantification were 0.003 and 0.01 mg kg. The mean initial deposits of fenazaquin 10 EC on green chilli fruits were found to be 0.74, 1.17, and 1.79 mg kg after the application @ 125 (X dose), 156.25 (1.25X dose), and 250 (2X dose) g a.i. ha, respectively, during the first year followed by 0.78, 1.20, and 1.70 mg kg, respectively, during the next year. The mean initial deposits in soil were found to be 0.18, 0.25, and 0.44 mg kg for the X, 1.25X, and 2X doses, respectively, during the first year and 0.19, 0.22, and 0.39 mg kg, respectively, during second year. The residues of fenazaquin in green chilli dissipated above 96% at 20 days in the three different doses whereas in red chilli, the residues were present on 25 days and at maturity, residues were below the limit of quantification (LOQ). In soil, the residues dissipated below the LOQ at 15 days for X and 1.25X while 20 days for the 2X dose, respectively. The half-life values in green chilli fruits and soil for the fenazaquin were found to be in the range of 3.22-3.93 days and 2.41-3.35 days, respectively. The waiting period was calculated to be 3, 5, and 8 days for green chilli after the application of fenazaquin at 25, 156.25, and 250 g a.i. ha, respectively.
芬喹在辣椒和土壤中的消解与持留动态研究 2 年，两年间芬喹以 10 天的间隔期使用了两次。检测限和定量限分别为 0.003 和 0.01mg/kg。在第一年，施药后绿辣椒果实上芬喹 10EC 的初始沉积量分别为 125（X 剂量）、156.25（1.25X 剂量）和 250（2X 剂量）g ai/ha 时为 0.74、1.17 和 1.79mg/kg，随后第二年的初始沉积量分别为 0.78、1.20 和 1.70mg/kg。在第一年，土壤中初始沉积量分别为 X、1.25X 和 2X 剂量时为 0.18、0.25 和 0.44mg/kg，第二年的初始沉积量分别为 0.19、0.22 和 0.39mg/kg。在三种不同剂量下，20 天时，绿辣椒中芬喹的残留量消解超过 96%，而在红辣椒中，残留量在 25 天，在成熟时，残留量低于定量下限（LOQ）。在土壤中，X 和 1.25X 剂量下，15 天时残留量低于 LOQ，而 2X 剂量下 20 天时残留量低于 LOQ。在绿辣椒果实和土壤中，芬喹的半衰期值分别为 3.22-3.93 天和 2.41-3.35 天。施药后，绿辣椒的安全间隔期分别计算为芬喹 25、156.25 和 250g ai/ha 后 3、5 和 8 天。
