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knapweed

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Spotted Knapweed - Washington State Noxious Weed Control Board
Spotted knapweed is a noxious, aggressive plant with a hairy, rough, woolly appearance, growing to 5 feet, with spotted flowerheads and pink, purple or white ... www.nwcb.wa.gov
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Centaurea - Wikipedia
Centaurea is a genus of over 700 species of herbaceous thistle-like flowering plants in the family Asteraceae. Members of the genus are found only north of ... en.wikipedia.org
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Spotted Knapweed - Montana Field Guide
Spotted Knapweed is a taprooted, rosette-forming perennial with unique dark-tipped, fringe-marked bracts that appear as "spots" from a distance. fieldguide.mt.gov
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knapweed
knapweed (ˈnæpwiːd) [Orig. knopweed, f. knop n.1 + weed n.; from the hard rounded involucre.] The common name of species of Centaurea (family Compositæ), esp. C. nigra, a common weed with a hard tough stem, and light purple flowers set on a hard rough dark-coloured globular ‘head’ or involucre.α 14.... Oxford English Dictionary
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Spotted Knapweed – NYIS - New York Invasive Species
Spotted knapweed is a biennial plant with spotted purple flowers, growing up to 3ft tall. It spreads rapidly, has plant-killing effects, and ... nyis.info
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Spotted knapweed identification and control - King County
Spotted knapweed is a regulated Class B noxious weed. Control is required in King County. Spotted knapweed is also on the Washington quarantine list. kingcounty.gov
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Meadow knapweed
Meadow knapweed (Centaurea × gerstlaueri), also known as hybrid knapweed or protean knapweed, is a fertile hybrid between black knapweed (Centaurea nigra Black knapweed has dark, comb-like bracts, while brown knapweed has rounded, papery tips. Meadow knapweed is intermediate between the two. wikipedia.org
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Knapweeds - Renz Weed Science
Knapweeds are herbaceous biennials or perennials. Seedlings emerge throughout the growing season and rosettes persist year-round. renzweedscience.cals.wisc.edu
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Diffuse knapweed - Colorado Department of Agriculture
Diffuse knapweed is a non-native biennial forb that reproduces solely by seed. A biennial is a plant that completes its life cycle within two years. ag.colorado.gov
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[PDF] Spotted Knapweed Identification and Management
Spotted knapweed can be spread by wind, water, wildlife, vehicles, contaminated hay, farm machinery, gravel distribution, equipment, and road construction. www.deschutes.org
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Diffuse Knapweed | Minnesota Department of Agriculture
Diffuse knapweed overtakes and suppresses native vegetation, reducing species diversity and wildlife habitat. It can also increase soil erosion. www.mda.state.mn.us
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Spotted knapweed, Centaurea stoebe, is a Eurasian invasive ...
Spotted knapweed has lactones which inhibit the growth and germination of nearby native plants, creating barren areas of only knapweed. It has ... www.facebook.com
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Knapweed Nightmare
The knapweed detection dog was taught a little differently than normal scent detection dogs- spending at least 10 seconds digging at a rosette of knapweed Nightmare has a 93 percent success rate overall in locating the invading non-native spotted knapweed. wikipedia.org
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Bangasternus fausti
It is used as an agent of biological pest control against noxious knapweeds, particularly spotted knapweed (Centaurea maculosa), squarrose knapweed (Centaurea virgata ssp. squarrosa), and diffuse knapweed (Centaurea diffusa). wikipedia.org
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Alpine flower identification — Italy/France I have been using the internet to try to identify alpine flowers photographed in July 2007 on a shortish walk above Chianale (1800 m), in the Italian Valle Varaita (borderin...
This is not _Jasione montana_ , but _**Phyteuma orbiculare**_ , another member of the family Campanulaceae. Except for the different flowers, Jasione has no leaves on the upper part of the stem. This plant has. And these leaves are toothed and have a heart-shaped base, unlike Jasione. And finally: P...
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