Monitoring of Pesticides and Major Metabolites in River of Paddy Field Basin
In Japan, more than half of the arable land is paddy fields, and almost half of the total amount of pesticides used is applied to paddy fields. Paddy pesticides flow easily into rivers from paddy fields, which are directly connected to rivers via drainage canals. Paddy pesticides are detected in river water at higher frequencies and at higher concentrations than are pesticides applied to upland fields. Pesticide metabolites may also be detected in rivers because some pesticides can be easily degraded by hydrolysis, photolysis, or biodegradation in water and soil. Metabolites of some pesticides, such as organophosphorus insecticides, are more active against the target organisms than are the parent compounds, however, detailed monitoring studies of metabolites in rivers are limited. Therefore, for precise assessment of exposure to paddy pesticides in aquatic environments, both pesticides and their metabolites must be monitored.
paddy pesticide metabolite river monitoring
Takeshi Horio
Organochemicals Division, National Institute for Agro-Environmental Sciences, Tsukuba, Japan
国际会议
北京
英文
150
2012-09-15（万方平台首次上网日期，不代表论文的发表时间）