This study investigates the fate and ecological risks of microencapsulated pyraclostrobin in water-sediment systems, indicating significant toxicity to aquatic life.
Microencapsulated suspensions (MEs) are widely used in agriculture for their enhanced pesticide efficacy and minimal environmental impact. However, their release mechanisms and associated risks remain insufficiently explored. This study investigated the release, environmental fate, and risks of pyraclostrobin MEs using HPLC-Q-TOF-HRMS and UPLC-QqQ-MS/MS. Field experiments showed only 3.6% of pyraclostrobin was in free state in water, with most encapsulated in microcapsules that settled in sediment. Seventeen transformation products were identified, primarily accumulating in sediment. Predictions of persistence (P), bioaccumulation (B), mobility (M), and toxicity (T) revealed eight highly mobile and four highly toxic metabolites. Metabolites m/z 281 and m/z 339 showed significant chronic toxicity to daphnia, surpassing pyraclostrobin toxicity. Risk quotient analysis indicated that m/z 358 and m/z 611 posed a moderate risk to daphnia and mysid. The study highlights the importance of evaluating MEs, focusing on their release mechanisms and ecological risks to ensure safe pesticide use.
No takes yet. Share an insight, caveat, or question.
Qiao et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: