Setaria faberi is an annual grass that can reach 2-5 ft. (0.61-1.5 m) in height.
Leaves are up to 16 in. (41 cm) long, 0.6-1 in. (15-25 mm) wide.
Round with hair on margins.
Short hairs cover the upper surface.
Fringe of hairs
Flowering occurs in late summer to early fall, when a green (eventually straw colored), bristly inflorescence develops. The inflorescence resembles a foxtail, hence the common name. ===Fruit===The fruit are small flattened ovoids with hard coats. They usually germinate in late spring to early summer.
Setaria faberi is native to Asia and was accidentally introduced in the United States in the 1920s as a contaminant of other grain. Plants invade disturbed sites such as roadsides, landfills, fence rows and right of ways.
Populations of this plant exist in the United States that are resistant to ACCase inhibitors (A/1), ALS inhibitors (B/2), and Photosystem II inhibitors (C1/5).
- University of California, Jepson Flora Project
- Virginia Tech Weed Identification Guide
- Flora of China, www.eFloras.org
- USDA NRCS PLANTS
- USDA ARS GRIN
- Heap, I., The International Survey of Herbicide Resistant Weeds. Online. Internet. Friday, November 15, 2013. The International Survey of Herbicide Resistant Weeds. Online. Internet.