University of Missouri Extension

IPM1007, Revised November 2009

Practical Weed Science for the Field Scout: Corn and Soybean

Quackgrass (Elymus repens)

Perennial grass

Quackgrass Quackgrass
Quackgrass

A perennial grass from rhizomes that may reach 3-1/2 feet in height. Quackgrass is a common weed of agronomic crops, turfgrass, lawns, nurseries and landscapes. Leaves are rolled in the bud and are 1-1/2 to 12 inches long and usually 2 to 3 mm wide but may reach 12 mm in width. Leaves may or may not have hairs on the upper surfaces, but lower leaf surfaces are without hairs. Leaves have membranous ligules that are less than 1 mm long and also have narrow auricles that clasp the sheath. Seedheads are long, narrow spikes consisting of many individual spikelets arranged in two rows along the stem. Spikes range from 2 to 8 inches in length.
 

IPM1007, revised November 2009

Wild thing
 

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

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