Abstract: The effect of 288 g/L fluroxypyr-mepthyl EC on broadleaved 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 fluroxypyr-mepthyl.The results indicated that the efficacy of weed control were remarkable by 288 g/L fluroxypyr-mepthyl EC in wheat field. All showed control efficacy on Galium aparine, Vicia sativa and Malachium aquaticum with a total fresh weight control effect from 90.3% to 99.9% after 60 days. After weed control, the consumption of N, P, K and water by weeds was significantly decreased, and the water and fertilizer conditions in the field were effectirely improved. The wheat yield was ranged 3 162.3 to 3 401.7 kg/hm² after treated with 288 g/L fluroxypyr-mepthyl EC, which increased by 23.0%~32.3% compared to untreated control. Moreover, the yield income increased by 1 358.84~1 909.46 yuan/hm².

Key words: fluroxypyr-mepthyl, weed control effect, nutrient content, wheat yield