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IPM1007, Practical Weed Science for the Field Scout: Corn and Soybean

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Practical Weed Science for the Field Scout: Corn and Soybean

Crabgrass, large (Digitaria sanguinalis)

Summer annual grass

Large crabgrass
Large crabgrass

A summer annual with a prostrate or ascending growth habit and stems that root at the nodes. Seedlings have sheaths and blades that are covered with hairs and have a jagged membranous ligule. Mature plants have leaves that are 1-1/4 to 8 inches long, 3 to 10 mm wide, with hairs on both surfaces. The ligules are 1 to 2 mm long and membranous. Leaves and sheaths may turn dark red or maroon with age. The seedhead is composed of 4 to 6 branches (spikes) at the top of stems, each about 1-1/2 to 7 inches long.
Large crabgrass
 

 

Wild thing
 

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