Kaium Abdul, Chi Wu, Yanli Man, Xingang Liu, Fengshou Dong, Youngquan Zheng
State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No.2, West Yuan-Ming-Yuan Road, Beijing, 100193, China.
Department of Agricultural Chemistry, Sher-E-Bangla Agricultural University, Dhaka, 1207, Bangladesh.
Environ Geochem Health. 2024 Dec 26;47(2):35. doi: 10.1007/s10653-024-02340-5.
Imidacloprid, a key neonicotinoid insecticide for pest control, is widely used in various crops, including peanuts. This study aimed to fill research gaps by analysing the residue behaviour of imidacloprid in peanut fields treated with flowable concentrate for seed treatment (FS) formulations while assessing potential risks to human health and ecosystems. A validated analytical method, using QuEChERS separation and UPLC-MS/MS detection, reliably quantified imidacloprid residues in peanuts and soil. Imidacloprid degradation followed a first-order kinetic model, with half-lives ranging from 21.0 to 46.2 days in plants and 10.3-30.1 days in soil. Residues in peanut kernels were below 0.05 mg/kg, and the maximum soil residue was 0.370 mg/kg. Dietary risk assessment indicated no health risks to adult consumers. However, ecological risk assessment predicted low to moderate earthworm toxicity and a medium risk from ecotoxicity exposure. These findings highlight the importance of adhering to recommended imidacloprid FS seed treatment dosages to minimise adverse effects on non-target soil organisms.
吡虫啉是一种用于害虫防治的关键新烟碱类杀虫剂，广泛应用于包括花生在内的各种作物。本研究旨在通过分析种子处理悬浮剂（FS）制剂处理的花生田中吡虫啉的残留行为，填补研究空白，同时评估对人类健康和生态系统的潜在风险。一种经过验证的分析方法，采用QuEChERS分离和UPLC-MS/MS检测，可靠地定量了花生和土壤中的吡虫啉残留量。吡虫啉的降解遵循一级动力学模型，在植物中的半衰期为21.0至46.2天，在土壤中的半衰期为10.3至30.1天。花生仁中的残留量低于0.05mg/kg，土壤中的最大残留量为0.370mg/kg。膳食风险评估表明，对成年消费者没有健康风险。然而，生态风险评估预测，对蚯蚓的毒性为低至中度，生态毒性暴露风险为中度。这些发现强调了遵守推荐的吡虫啉FS种子处理剂量以尽量减少对非目标土壤生物的不利影响的重要性。
