Amiprophosの土壌中での消長

概要

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The behavior in soil of amiprophos (O-ethyl O-(2-nitro-p-tolyl) N-isopropyl phosphoramidothionate) in which we was the most interested from the points of efficacy and selectivity was investigated by gas liquid chromatography using flame photometric detector and ^<32>P-amiprophos tracer. Amiprophos was highly persistent in soil surface layer. The rate of disappearance of amiprophos from soil was affected by soil temperature, texture and microbial metabolism. According to ^<32>P-amiprophos tracer technique, four degradation products were found as main pro-ducts. They were amino amiprophos, amiprophos oxygen analog, O-ethyl N-isopropylamino phosphorothioic acid and O-ethyl phophorothioic acid. Oxidative and reductive metabolisms would take place simultaneously under paddy condition. Oxidative metabolism would take preference to reductive one under upland condition. In fact, production of the reductive product such as amino amiprophos in upland soil was considerably smaller when compared with that in paddy soil.
日本雑草学会の論文
1973-02-25