実験室酸化還元条件における水田土壌中でのメフェナセットとプレチラルロールの消失

概要

論文の詳細を見る
Mefenacet [2-(benzothiazo1-2-yloxy)-N-methylacetanilide]^<2)> and pretilachlor [2-chloro-2', 6'-diethyl-N-(2-propoxyethyl) acetanilidel]^<5)> are both highly selective herbicides used in paddy rice and very popular in Japan. Both of them belong to class amides which are used as pre-emergent or pre-plant soil incorporated herbicides^<2'6)>. Mefenacet is strongly adsorbed in soil^<12)> and its half-life is reported to be about 10 days in alluvial soil and 180 days in volcanic soils^<13)>. Pretilachlor, a chloroacetanilide, is reported to have a half -life of 2-20 days in the field and 6-20 days in the laboratory^<5)>. Currently, only a handful of studies dealing with the dissipation or degradation of mefenacet and pretilachlor under lowland conditions have been reported in Japan^<10,11)>. It was therefore the aim of this study to elucidate the major path of dissipation of mefenacet and pretilachlor in paddy soil under laboratory conditions. The experiments were subdivided into oxidative and reductive under autoclaved :and non-autoclaved conditions to determine the role of microbes in the dissipation of the two herbicides.
日本雑草学会の論文
2000-12-28