【目的】研究噻虫嗪在甘蔗和土壤中的残留及消解动态,并评价噻虫嗪残留对消费者的健康风险和土壤中非靶标生物蚯蚓的环境风险,为噻虫嗪在甘蔗上的安全使用提供科学依据。【方法】分别于2015和2016年在海南和广西开展10%噻虫嗪颗粒剂在甘蔗和土壤中的残留消解试验和最终残留试验,并根据蔗茎和土壤中噻虫嗪及其代谢物噻虫胺的残留量,评估其对人类急慢性膳食暴露风险和对非靶标生物蚯蚓的环境风险。【结果】噻虫嗪在甘蔗植株中的半衰期为8.4～18.2 d,在土壤中的半衰期为17.3～22.4 d;甘蔗蔗梢和蔗茎中噻虫嗪及其代谢物噻虫胺的最终残留量均低于定量限(LOQ)(0.05 mg/kg),但施用高剂量562.5 g a.i/ha后,收获期土壤中噻虫嗪残留量高于LOQ,达0.146～0.153 mg/kg;噻虫嗪和噻虫胺对我国一般人群的估计每日摄入量(EDI)仅为每日允许摄入量(ADI)的0.0039%～0.0049%,估计短期摄入量(ESTI)仅为急性参考剂量(ARfD)的0.17%～0.29%;噻虫嗪对蚯蚓的风险商(RQ)<0.01,噻虫胺对蚯蚓的RQ=0.016。【结论】在甘蔗苗期按照375.0～562.5 g a.i/h...
【英文摘要】
【Objective】Residue and degradation dynamic of thiamethoxam on sugarcane and soil were determined in this study,the health risk to consumers and environment risk to non-target organism earthworm in soil were also assessed according to the residues of thiamethoxam,the results would provide references for the rational use of thiamethoxam on sugarcane.【Method】The residue degradation dynamic and final residue experiments of 10% thiamethoxam granule in sugarcane and soil were conducted in Hainan and Guangxi durin...
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