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: Reed canarygrass emerging in spring
Photo by: B.M. Johnson
  
Weeds : Reed canarygrass : Phalaris arundinacea
(revision date: 4/5/2016)

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

Use Integrated Pest Management (IPM) for successful weed management.

Biology
An aggressive plant, reed canarygrass grows from a large root system. It spreads rapidly by seeds and rhizomes to form large, dense patches, effectively crowding out other plants. The stems are two to seven feet tall. Leaves are flat, but rolled in the bud before emerging. Leaf blades are 1/4 to 3/4 inch wide, three to eight inches long, and tapering to a pointed tip. The leaf edges are rough. The ligule (found at the point where the leaf blade joins the leaf sheath) is an obvious membrane 1/5 to 1/2-inch long. The leaf sheaths are membranous along the edges. Seeds are borne in a dense panicle or seed head, which appears to be branched at the bottom and unbranched above. The panicles are closed and compact initially, but open at maturity, becoming somewhat plume-like. The seed heads turn light brown above the green foliage as they mature. Ribbongrass (Phalaris arundinacea var. picta) is a striped ornamental variety of reed canarygrass. It is also considered to pose a threat, both as an invasive species and by cross-breeding with established populations of reed canarygrass (see "Ornamental Grass Threatens Native Biodiversity", WSU Extension Fact Sheet FS106E, for more information). SPECIAL INFORMATION: In WASHINGTON, reed canarygrass is designated as a Class 'C' noxious weed. Management may be required by law in your county. Consult your local Noxious Weed Control Board for more information.
Habitat
Reed canarygrass is found in wet areas, along streams and ditches, in marshes, and along roadsides. It can be a particular problem along irrigation ditches and canals.

Management Options

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

Chemical Management

Applications should be made by those holding a current aquatic pest control license. In Washington, a special permit is required for use of herbicides in aquatic sites. Contact the Washington Department of Ecology or the Washington State Noxious Weed Control Board for more information. Apply products to weeds when actively growing. Spot treatments with certain post-emergent herbicides will control weedy grasses, but will also kill the turf. Glyphosate products should be applied 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
Turf areas
  • glyphosate
Bare ground areas
  • glyphosate
Images

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Caption: Reed canarygrass emerging in spring
Photo by: B.M. Johnson
Caption: Reed canarygrass in summer
Photo by: Purdue University
Caption: Reed canarygrass ligules
Photo by: R. Parker
Caption: Reed canarygrass rhizomes and stems
Photo by: R. Parker
Caption: Reed canarygrass seed heads
Photo by: Purdue University
Caption: Reed canarygrass collar
Photo by: T.W. Miller
Caption: Reed canarygrass flowers
Photo by: T.W. Miller
Caption: Reed canarygrass leaves
Photo by: T.W. Miller
Caption: Reed canarygrass leaf
Photo by: T.W. Miller
Caption: Reed canarygrass stand in autumn
Photo by: T.W. Miller