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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Metabolism of the Strobilurin Fungicide Mandestrobin in Wheat
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Metabolism of the Strobilurin Fungicide Mandestrobin in Wheat

机译:小麦的斯特罗脲杀菌剂的代谢

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摘要

The metabolic fate of a new fungicide, mandestrobin, labeled with C-14 at the phenoxy or benzyl ring was examined in wheat after a single spray application at 300 g/ha. Mandestrobin penetrated into foliage over time, with both radiolabels showing similar C-14 distribution in wheat, and 2.8-3.3% of the total radioactive residue remained on the surface of straw at the final harvest. In foliage, mandestrobin primarily underwent mono-oxidation at the phenoxy ring to produce 4-hydroxy or 2-/5-hydroxymethyl derivatives, followed by their subsequent formation of malonylglucose conjugates. In grain, the cleavage of its benzyl phenyl ether bond was the major metabolic reaction, releasing the corresponding alcohol derivative, while the counterpart 2,5-dimethylphenol was not detected. The constant RS enantiomeric ratio of mandestrobin showed its enantioselective metabolism to be unlikely on/in wheat.
机译:在300g / ha的单个喷雾施用后,在小麦中检查新的杀真菌剂,用C-14标记的新杀菌剂的代谢命运。 芽蛋白随着时间的推移渗透到树叶中,两种放射性标签显示出类似的小麦的C-14分布,2.8-3.3%的总放射性残留物在最终收获的稻草表面上。 在叶子中,芽虫蛋白主要在苯氧基环上进行单氧化,以产生4-羟基或2- / 5-羟甲基衍生物,然后进行其随后形成丙二糖缀合物。 在谷物中,其苄基苯基醚键的切割是主要的代谢反应,释放相应的醇衍生物,而未检测到对应的2,5-二甲基苯酚。 甘蓝叶蛋白的恒定Rs对映致映比显示其对映射性代谢,以不太可能在小麦上。

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