University of Missouri Extension

IPM1007, Revised November 2009

Practical Weed Science for the Field Scout: Corn and Soybean

Johnsongrass (Sorghum halepense)

Perennial grass

JohnsongrassJohnsongrass
 

JohnsongrassA perennial from thick, white rhizomes that may reach 6-1/2 feet in height. Leaves are rolled in the shoot, without auricles, 6 to 20 inches long by 10 to 30 mm wide, with a prominent white midvein. Leaf blades are usually without hairs on both surfaces, although some hairs may be present at the base of the leaf blade. The ligules are 3 to 4 mm long, membranous, and often toothed at the top. Sheaths are round to somewhat flattened and usually without hairs, but sometimes hairs may be present along the margins. Seedheads are large, open panicles, often with a purplish tint.

Johnsongrass
 

 

Wild thing
 

IPM1007 Practical Weed Science for the Field Scout: Corn and Soybean | University of Missouri Extension

Order publications online at http://extension.missouri.edu/explore/shop/ or call toll-free 800-292-0969.

University of Missouri Extension - print indicia