Legacy and Current-Use Insecticides in Agricultural Sediments from South China: Impact of Application Pattern on Occurrence and Risk
作者： Yanli Wei , Huizhen Li , Junjie Zhang , Jingjing Xiong , Xiaoyi Yi
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摘要: Legacy and current-use insecticides were analyzed in sediments collected from a typical rice-planting region South China. Total concentrations of varied 1.63 to 775 ng g–1 with mean median values 67.0 11.5 g–1, respectively. Pyrethroids predominated pesticide composition (31.7%), followed by organophosphates (23.0%) fiproles (20.8%). Sediment risk analysis showed that pyrethroids, fiproles, abamectin posed significant benthic invertebrates one-third sediments. Different distributions pyrethroids urban agricultural areas consistent their application patterns, whereas legacy organochlorine pesticides no region-specific distribution because rapid transition land use pattern areas. Likely illegal fipronil caused serious ecological risks waterways. restricted paddy fields, but occurrence and...
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