数字农科院2.0

Toxicity assessment of a novel biopesticide guvermectin and identification of its transformation products in soils

文献类型： 外文期刊

作者： Yuan Shi;Bin Jiao;Peilin Guo;Xinglu Pan;Xiaohu Wu;Jun Xu;Wensheng Xiang;Fengshou Dong;Xiangjing Wang;Yongquan Zheng

作者机构：

关键词： Biopesticide;Biotoxicity;Degradation behavior;Guvermectin;UPLC-QTOF/MS

期刊名称： Science of the Total Environment

ISSN： 0048-9697

年卷期： 2023 年 903 卷

页码：

收录情况： SCIE（2023版） ; ; EI（2023版）

摘要： Guvermectin is a novel biopesticide often used as seed soaking to promote the rice yield. However, its biotoxicity and degradation behavior in soils were still not disclosed, which posed a knowledge gap to guide its rational application. Therefore, the degradation behaviors of guvermectin in four typical soils under aerobic and anaerobic conditions were investigated in the laboratory. The results showed that guvermectin was degraded fast with DT50 ranging from 0.95 to 10.10 d, and the degradation rate was higher in aerobic condition than that in anaerobic condition. Eight transformation products were screened using UPLC-QTOF/MS. The acute toxicities tests of guvermectin to Coturnix coturnix japonica and Apis mellifera were measured by biological laboratory experiments, and the acute and chronic toxicities of transformation products to Danio rerio, Daphnia magna Straus and Green algae were predicted by ECOSAR software. The results showed that guvermectin has low toxic to quail and honeybee (LD50 2000 mg a.i./kg body weight, LD50 ˃ 100 μg a.i./bee), and its transformation products were also low toxic class to Danio rerio, Daphnia magna Straus and Green algae (LC50/EC50 > 100 mg a.i./L). However, the nucleoside-like metabolites may pose a potential risk due to their similarity to genetic material, which should be concerned. The findings provided important environmental risk assessment data for the rational use of guvermectin.

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