甲基磺草酮又名米斯通、硝磺草酮,是瑞士先正达开发的三酮类除草剂,属于内吸性玉米田苗前苗后广谱型除草剂,能有效防除玉米田一年生阔叶杂草和一些禾本科杂草,对阔叶草的药效优于禾本科,如苘麻、苍耳、刺菜、藜属杂草、地肤,蓼科杂草、稗草、繁缕、马唐等。甲基磺草酮具有弱酸性,在大多数酸性土壤中,能紧紧吸附在有机物质上;在中性或碱性土壤中,以不易被吸收的阴离子形式存在。温度高,有利于甲基磺草酮药效发挥; Mesotrione, also known as messtone, mesotrione, is a synergistic herbicide developed by Syngenta in Switzerland. It belongs to the broad-spectrum herbicide of the pre-emergence sprouting corn in the aspiration corn field, which can effectively prevent annual corn Broadleaf weeds and some grass weeds, the efficacy of broad-leaved grass better than Poaceae, such as hemp, cocklebur, sting, weed weed, Kochia scoparia, Polygonum weeds, barnyardgrass, Strands, crabs and so on. Mesotrione is weakly acidic and adsorbs tightly on organic matter in most acidic soils; it is present in neutral or alkaline soils as an easily absorbed anion. High temperature is conducive to the efficacy of mesotrione;