State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; College of Plant Health and Medicine of Qingdao Agricultural University, Qingdao 266109, PR China.
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
Sci Total Environ. 2022 Nov 15;847:157670. doi: 10.1016/j.scitotenv.2022.157670. Epub 2022 Jul 28.
Neonicotinoid insecticides (NIs) are widely used worldwide, accounting for 25 % of the global insecticide market, and are easily transported into surrounding aquatic ecological environments after application. At present, >80 % of surface water is contaminated by NIs globally. Some transformation products (TPs) of NIs can exhibit greater toxicity to aquatic organism than their parent products. However, few studies have evaluated the toxicity and ecological risk of the TPs of NIs. In this study, we aimed to assess the toxicity and ecological risk of seven widely used NIs and their aerobic TPs to aquatic organisms using a prediction method. We found that partial aerobic TPs of NIs have greater toxicity to aquatic organisms than their parent products, and some of them could severely damage aquatic ecosystems. Meanwhile, acetamiprid, thiacloprid, and several other TPs of NIs with a chlorinated ring structure showed strong bioconcentration abilities, which could potentially harm aquatic organisms through the food chain. Moreover, the widespread use of NIs has certain aquatic ecological risks, which should be controlled and limited. This study comprehensively evaluated the ecological risk of seven widely used NIs and their aerobic TPs to aquatic organisms for the first time. Our results could provide an important reference for assessment of the aquatic environmental risk posed by NIs and pollution control.
新烟碱类杀虫剂（NIs）在全球范围内广泛使用，占全球杀虫剂市场的 25%，施用于农作物后很容易转移到周围的水生生态环境中。目前，全球有超过 80%的地表水受到 NIs 的污染。NIs 的一些转化产物（TPs）对水生生物的毒性比其母体产物更大。然而，很少有研究评估 NIs 的 TPs 的毒性和生态风险。在这项研究中，我们旨在使用预测方法评估七种广泛使用的 NIs 及其需氧 TPs 对水生生物的毒性和生态风险。我们发现，部分 NIs 的需氧 TPs 对水生生物的毒性大于其母体产物，其中一些 TPs 可能严重破坏水生生态系统。同时，具有氯化环结构的噻虫嗪、噻虫胺和其他几种 NIs 的 TPs 具有很强的生物浓缩能力，可能通过食物链对水生生物造成危害。此外，NIs 的广泛使用对水生生态系统存在一定的生态风险，应加以控制和限制。本研究首次全面评估了七种广泛使用的 NIs 及其需氧 TPs 对水生生物的生态风险。我们的研究结果可为评估 NIs 对水生环境的风险和污染控制提供重要参考。
