Giant Foxtail, Japanese Bristlegrass
(Setaria faberi Herrm.)
Poaceae (Grass Family)
▲▼ mature plants with drooping, spike inflorescences
▲▼ mature plants with drooping, spike inflorescences
▲▼ mature plants growing in corn crop-- some toward center-back of photo are over 5 feet tall
▲▼ spike often bends over from lower 1/3 of spike, and is soft, flexible
▲ inflorescence detail
▲▼ Ligule and collar region
Giant Foxtail:
· tallest of the group, reaching 4-5' in cultivated, moist soils
· has fine hair on upper side of leaves
· has a long, drooping "foxtail" inflorescence; inflorescence may be up to 6" long
· can produce up to 10,000 seeds per plant
· has a moderate allelopathic effect on corn
· one giant foxtail plant per foot of row can reduce soybean yields 13%
compare with bristly foxtail, green foxtail and yellow foxtail
