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Johnsongrass (Sorghum halepense) is a rapidly growing warm-season perennial weed found in cultivated and no-till croplands, perennial field crops, hay fields, roadsides and other wasteland areas. Large johnsongrass populations can be very competitive with soybeans. Yield reduction can happen is a little as three weeks in dry conditions and eight weeks when soil has abundant moisture. This fact sheet shares management practices for controlling johnsongrass in soybeans.

Publication No. MX1132