Stem

15-30 in. tall with 1 to many stems or tillers; tillers and branching from base of plant can give it a bunchgrass-like appearance

Leaves

Blue-green, 1-6 in. long, 0.125-0.25 in. wide, simple; alternate; auricles, ligules, leaf sheaths and leaf margins near leaf base have evenly spaced fine hairs which distinguish it from other grass weeds

Photo of many green jointed goatgrass plants

Flower

Seedhead cylindrical, 1-5 in. long; spikelets held close to the spike, resulting in a jointed look

Photo of the top of green jointed goatgrass plant

Root

Fibrous; spiklelet that led to germination commonly still attached to the base of the plant

Photo of a field of jointed goatgrass plants

Other

Grows best in grasslands, rangeland, pastures, roadsides, wheat and alfalfa fields; grows well in compacted soils; known to occur in Churchill, Elko and Washoe counties
Winter annual; seeds viable in soil up to 5 years
Infestations in wheat can reduce value of crop; may cross-breed with wheat

Photo of green jonted goatgrass seeds still on the plant

Control

Hand-pull or hoe small infestations; repeated mowing prior to seed production is effective; tilling to 4 in. depth is effective, but subsequent tilling may return seeds to the surface; burning can kill mature plants and remove thatch, but it will not control the seedbank
Apply glyphosate post emergence in late winter or early spring before flowering to actively growing plants; apply imazapic, sulfometuron or sulfometuron+chlorsulfuron preemergence in the fall or post emergence in early spring to young plants after soil thaws

Blecker, L., Creech, E., Dick, J., Gephart, S., Hefner, M., Kratsch, H., Moe, A., Schultz, B. 2020, Nevada Noxious Weed Field Guide – Jointed goatgrass, Extension, University of Nevada, Reno, Field Guide

Extension Associated Contacts

Heidi Kratsch

Also of Interest:


Nevada Noxious Weed Field Guide – Barbed goatgrass Barbed goatgrass is a noxious weed that has been identified by the state of Nevada to be harmful to agriculture, the general public, or the environment. Learn more about this weed. Blecker, L., Creech, E., Dick, J., Gephart, S., Hefner, M., Kratsch, H., Moe, A., Schultz, B. 2020, Extension, University of Nevada, Reno, Field Guide

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Nevada Noxious Weed Field Guide – Jointed goatgrass