The results of field trial showed that excellent weed control performance were achieved when 15% ICIA0051 Oil Suspension Concentrate was applied at the 3-4 leaf stage of corn within the application dosage 112.5~337.5g/hm² with an average control percentage 32.6%~74.8% against barnyard grass,and 64.6%~95.0% against all kinds of broadleaf weeds and with 82.8%~98.5% for the total weight of all kinds of weeds.It’s a broad spectrum and persistent herbicide,and raised the yield of corn by 6.7% compared with the control.