Abstract: In order to verify the field efficacy and safety of 10% saflufenacil suspension agent（SC） in controlling broadleaf weeds in winter wheat（Triticum aestivum L.） fields, field pharmacodynamic experiments were carried out by the stem and leaf spray methods. The results showed that 20 days after the administration, the dosage of the 10% saflufenacil SC in the field were 30.0, 52.5, 75.0, 105.00 g/hm², the weeds control effects on quantity were 89.20%~100.00% on Malachium aquaticum（L.） Moench, Galium spurium L. and Veronica didyma Tenore.40 days after the administration, the weeds control effects were 88.60%~100.00%, and the fresh weight control effects were 89.10%~100.00%. Under the same dosage, the agent had better control effect on Galium spurium L. than Malachium aquaticum（L.） Moench and Veronica didyma Tenore. The recommended dosage of 10% saflufenacil suspension agent SC in field were 30.0~75.0 g/hm². Within the range of recommended dose, 10% saflufenacil SC could effectively control broadleaf weed in winter wheat field, and it was safety to winter wheat.

Key words: saflufenacil, winter wheat（Triticum aestivum L.）, efficacy, safety