Monosulfuron 10% WP effectively controlled Puccinellia tenuiflora in wheat field trial. Control was95% at the recommended rate. Monosulfuron was more effective than Danyi 50% EC and alachlor 45% EC.Monosulfuron was safe to wheat at all rates tested. Tribenuron-methyl 10% WP provided unsatisfactory controlof Puccinellia tenuiflora .