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Washington State Noxious Weed Control Board |
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Class B Noxious Weed
Lawnweed
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Other common names:
field burweed
Plant family:
Asteraceae (Compositae)
Year listed:
Native to: South
America
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Why is it a noxious weed? |
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Lawnweed establishes in high-use recreational areas - public swim and boat launching areas and sites that have a high level of disturbance in managed grass areas. This weed produces very sharp seeds (burs) that can puncture skin and attach themselves to tires. This winter annual successfully out-competes the perennial grasses of managed lawn areas in parks and recreation areas world-wide. Lawnweed dies back in the summer leaving open, brown and bare areas, which contribute to its spread. |
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How would I identify it? |
| General Description:
Lawnweed is a low growing winter annual. The
plant will grow to about two inches tall, with a spread of six inches in
diameter. Leaves:
Flowers:
Stems:
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How does it reproduce? |
| Lawnweed reproduces by seed. | ||
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Where does it grow? |
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Lawnweed is found in managed perennial grass areas usually associated with heavy foot traffic, public swim areas, and boat launches of public lakes.This plant is also found in watered lawns, golf courses, and hard-packed soils near paths and roadsides. |
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What is the distribution in Washington State? |
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How do I control it? |
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General control methods: Cultural: Information not available at this time. Herbicide: Please refer to the PNW Weed Management Handbook, or contact your county noxious weed coordinator. Mechanical: Information not available at this time. Biological: None known. |
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For more information |
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For more information, download our
Written Findings.
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Last updated July 02, 2008