WSU Extension

Hortsense

Weeds
 
Annual bluegrass 
Barnyardgrass 
Bentgrass, creeping 
Bermudagrass 
Bittercress (Shotweed, Hairy bittercress) 
Bittersweet nightshade (European bittersweet) 
Black medic 
Blackberry (Himalayan, Evergreen, Pacific) 
Blue mustard (Purple mustard, Tenella mustard) 
Brackenfern, western 
Buffalobur 
Bull thistle 
Buttercup, creeping 
Canada thistle 
Catchweed bedstraw (Cleavers) 
Catsear, common (False dandelion) 
Chickweed, common and mouseear 
Clover 
Comfrey 
Crabgrass 
Dandelion 
Dock (Curly, Broadleaf) 
Dodder 
Downy brome (Cheatgrass, Downy chess) 
Dwarf mistletoes 
English daisy (Lawn daisy) 
English ivy 
Field bindweed (Wild morningglory) 
Field pennycress (Fanweed) 
Flixweed 
Foxtail (Green, Yellow, Bristly) 
Garden loosestrife 
Giant hogweed 
Goldenrods 
Groundsel, common 
Hawkweeds 
Hedge bindweed 
Henbit 
Herb Robert (Robert geranium, stinky Bob) 
Horsetails (Scouringrush) 
Horseweed (Marestail) 
Knapweeds 
Knotweeds (Bohemian, Giant, Japanese, Himalayan) 
Kochia 
Lambsquarters, common 
Liverworts 
Mallow, common (Cheeseweed, Buttonweed) 
Nightshades 
Oxalis (Creeping woodsorrel) 
Parrotfeather and Eurasian watermilfoil 
Pineappleweed 
Plantain (Broadleaf, Buckhorn) 
Poison hemlock 
Poison ivy and Poison oak 
Prickly lettuce (China lettuce) 
Prostrate knotweed 
Puncturevine (Tackweed, Goathead) 
Purple deadnettle (Red deadnettle) 
Purple loosestrife (Purple lythrum) 
Purslane, common 
Quackgrass 
Red sorrel (Sheep sorrel) 
Redroot pigweed (Rough pigweed) 
Redstem filaree (Stork's bill, Crane's bill) 
Reed canarygrass 
Russian thistle (Tumbleweed) 
Ryegrass, annual (Italian ryegrass) 
Salsify (Goatsbeard) 
Scotch broom 
Shepherd's-purse 
Smartweeds 
Sowthistle, annual and perennial 
Speedwells 
Spurges (Prostrate spurges) 
St. Johnswort, common (Goatweed, Klamathweed) 
Stinging nettle 
Tansy ragwort 
Tumblemustard (Jim Hill mustard) 
Velvetgrass (Common velvetgrass) 
Velvetleaf 
Water primrose 
Waterhemlock, western 
Yellow nutsedge 



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Caption: Yellow foxtail
Photo by: D.G. Swan
  
Weeds : Foxtail (Green, Yellow, Bristly) : Setaria spp.
(revision date: 9/3/2015)

Family: Poaceae (Graminae)
Cycle: Annual
Plant Type: Grass

Biology
Three species of foxtails are found in the Pacific Northwest: green foxtail (S. viridis), yellow foxtail (Setaria pumila), and bristly foxtail (S. verticillata). Yellow foxtail grows in clumps reaching one to three feet. The leaves are smooth, 1/8 to 3/8 inch wide, and tapering to a point. The ligule (occurring at the point where the leaf blade joins the leaf sheath) is comprised of a fringe of hairs, with numerous long hairs at the leaf base. The leaf sheath is smooth, and auricles are absent. The seeds are borne at the tops of the stems in a densely packed, "hairy" seed head one to five inches long. The greenish to brown seeds are about 1/8 inch long. Green foxtail is similar to yellow foxtail, but is generally shorter in height, has rough leaf sheaths, shorter seed heads, smaller seeds, and lacks the long hairs at the leaf bases. Bristly foxtail resembles green and yellow foxtails, but the seed heads are bristly rather than hairy, causing them to cling to clothing and animals.
Habitat
Foxtails are weeds of cultivated areas, roadsides, and waste areas. They can be a serious problem in some crops.

Management Options

Non-Chemical Management
None recommended
Select non-chemical management options as your first choice!

Chemical Management

Preemergent herbicides are very effective in controlling foxtails. In areas where annual grasses are consistent problems, apply in spring when soil temperatures reach 50 to 55 degrees F. Glyphosate products should be used as spot treatments only! NOTE: Some ingredients listed here are only available in combination. Read the label carefully on combination products to make sure the product is suitable for your specific situation.

Landscape areas
  • glyphosate
  • oryzalin
  • trifluralin
  • sethoxydim
Turf areas
    Bare ground areas
    • glyphosate
    • products containing diquat
    Images

    + Show larger images

     
    Caption: Yellow foxtail
    Photo by: D.G. Swan
    Caption: Seedheads: green foxtail at left, yellow foxtail at right
    Photo by: D.G. Swan
    Caption: Green foxtail
    Photo by: R. Parker