PRE-EMERGENCE CONTROL OF BROAD-LEAVED WEEDS, GRASSES AND CYPERUS ROTUNDUS IN SUGAR CANE WITH SULFENTRAZONE

摘要

Sulfentrazone at 0.75 and 1.8 kg a.i./ha alone and 0.6 to 1.125 kg/ha tank-mixed with atrazine or diuron at 2.0 kg a.i./ha were compared to a standard treatment of oxyfluorfen + diuron at 0.5 + 2.0 kg a.i./ha for the pre-emergence control of weeds inplant cane. Sulfentrazone at 1.5 and 1.8 kg/ha continued to control both broadleaf and grass weeds 12 to 16 weeks after application, with control being comparable to the standard oxyfluorfen + diuron treatment. However, some crop injury was observed at the 1.8 kg/ha rate. Tank-mixing lower rates of Sulfentrazone with atrazine or diuron did not improve the level of control. Control of Cyperus rotundus and Kyllinga bulbosa, observed in field trials, was confirmed in the greenhouse. Sulfentrazone at 1.5 kg/ha appears to be promising for broad-spectrum pre-emergence weed control in sugar cane.