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Species
Information
- quackgrass
- Agropyron repens (L.) Beauv. =Elymus repens (L.) Gould =Elytrigia repens (L.) Desv. ex B.D. Jackson
- USDA
Symbol: ELRE4
- Oregon
Noxious Weed Designation: B
- Pictures
Identification:
Perennial; grows 1 to 3 feet tall. Leaf blades 1/4 to 1/2 in wide, flat, pointed and often constricted near the tip. Flower spikelets arranged in two long rows, borne flatwise to the stem. Rhizomes yellowish white, sharp pointed, somewhat fleshy, and able to penetrate hard surfaces and tubers and roots of other plants.
Impacts:
Quackgrass rhizomes produce a chemical that can suppress the growth of other plants and adversely affects the yield of all cultivated crops. It is often a contaminant of cultivated seed, which results in grade reduction. In severely infested fields, quackgrass rhizomes can weigh as much as 7 to 9 tons/acre.
Biological
Controls: No approved biological control agent is available.
Oregon
Maps of Quackgrass Distribution
Links:
USDA
Plants Database information on quackgrass
GRIN
Database information on quackgrass
Oregon Department
of Agriculture information on quackgrass
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