Abstract: The effect of 6% pinoxaden·mesosulfuron-methyl OD on weed control in wheat field was studied. The wheat yield, the content of N-P-K and water were also analyzed after weed control by pinoxaden·mesosulfuron-methyl. The results indicated that the efficacy of weed control were remarkable by 6% pinoxaden·mesosulfuron-methyl WDG in wheat field. The control efficacy on Malachium aquaticum, Polypogon fugax and Beckmannia syzigachne was ranged from 90.8% to 97.5%. The accumulation of weed water and fertilizer was significantly decreased after weed control. The wheat yield was ranged 3 482.52 to 3 603.77 kg/hm² after treated with pinoxaden·mesosulfuron-methyl, which increased by 36.17%~40.91% compared to untreated control. Moreover, the yield income increased by 2 127.5~2 406.4 yuan/hm².

Key words: pinoxaden·mesosulfuron-methyl, weed control effect, nutrient content, wheat yield