Field Efficacy Evaluate of 75% Tribenuron-methyl WDG on Broadleaf Weeds Control in Spring Wheat Field

In order to discuss the control efficacy and safety of 75%tribenuron-methyl WDG on annual broadleaf weeds in spring wheat field,field plot trials were conducted.The results showed that the suitable application period of 75%tribenuron-methyl WDG was 4~5leaf stage of spring wheat seedling and the height of annual broadleaf weeds was below 5cm,the appropriate amount of effective ingredients was 18.0~22.5g·hm-2,it was safety in recommended dose for spring wheat.The total control efficacy on annual broadleaf weeds was 95.9%~99.2%and control effect of fresh weight was 97.6%~99.7%after 30dfor applying.