Effect and Safety of Controlling Weed in Spring Corn Field with Mesotrione,S-Metolachlorand Atrazine 472 g/L SE

[Aims]the paper aims to analyze the control efBciency and the safety of mesotrione,S-metolachlorand atrazine472 g/L SE to weeds in corn fields.[Methods]This experiment was carried out by methods of soil spray after 3-5 d after the maize seeding and regular investigation.[Results]The results showed that the controlled weeds by mesotrione,S-metolachlor and atrazine 472 g/L SE included annual grass weeds and most broad-leave weeds.Its efficiency is87.9-99.5%after 40 d applied,and control efficiency of fresh weight to weeds was 94.5-99.9%.[Conclusions]The application dose is 2 832-3 186 g a.i./ha with 750 L water to soil sprayafter the maize seeding 3-5 d.