新型杀菌剂唑菌酯在黄瓜植株中的动态代谢

The Dynamic Transformation of New Fungicide Pyraoxystrobin in Cucumber

唑菌酯是我国创制的具有完全自主知识产权的一种新型高效杀菌剂。本文以14C放射性标记唑菌酯为示踪剂,在实验室条件下,研究了唑菌酯在黄瓜植株中的动态代谢变化及其规律。结果表明:(1)施药后,黄瓜植株对唑菌酯的吸收呈随时间推移而增加的趋势,至12d时黄瓜植株对唑菌酯的吸收量达到70%。(2)唑菌酯及其代谢产物在黄瓜植株中的结合残留量随时间的增加而增加,而可提态残留呈现先上升后下降的趋势。(3)本研究共检测到黄瓜植株的7个放射性代谢产物,其中之一为中间态代谢产物。

Pyraoxystrobin,（E）-methyl 2-（3-（（3-（4-chlorophenyl）-1-methyl-1H-pyrazol-5-yloxy） methyl） phenyl）-3-methoxyacrylate,is a new fungicide and has its own intellectual property in China.The mechanism of the dynamics and metabolites of Pyraoxystrobin in cucumber（Cucumis sativa L.） is investigate by isotopic tracer method with 14C-Pyraoxystrobin under laboratory conditions.Results showed as follows：（1） The pyraoxystrobin absorption increases with the increasing of time.At 12 days after treatment,the uptake of pyraoxystrobin has reached 70%.（2） The bound residues of Pyraoxystrobin and/or its metabolites in cucumber has the linear relation with the time,while its extractable residues increase during the first 8d,and then decreased.（3） There are seven radioactive metabolites detected by LSC-HPLC in cucumber plants,one of which is an intermediate metabolite.