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Japanese Knotweed Japanese knotweed, commonly known as crimson beauty, Mexican bamboo, Japanese fleece flower, or Reynoutria, was probably introduced to the U.S. as an ornamental. Knotweed was collected in the Tennessee region in the 1940s and is now found throughout the state. Japanese knotweed is distinguished by greater overall height, and vigorous growth of stout rhizomes. www.tneppc.org /Manual/Japanese_Knotweed.htm   (1032 words)

Knotweed A herb with astringent and diuretic properties, knotweed is used in European herbal medicine to treat diarrhea and hemorrhoids, to expel worms, to staunch bleeding wounds, to reduce heavy menstrual flow, and to stop nosebleeds. Knotweed is also taken for pulmonary complaints since its silicic acid content helps strengthen connective tissue within the lungs. In the Chinese tradition, knotweed is given for intestinal worms, to " treat diarrhea and dysentery, and as a diuretic, particularly in cases of painful urination. www.herbs2000.com /herbs/herbs_knotweed.htm   (353 words)

Action Log - Japanese Knotweed Eradication Japanese knotweed was introduced to the United Kingdom as an ornamental in 1825, and from there to North America in the 19th Century. Japanese knotweed is also known as Japanese or Mexican bamboo, because the stem becomes woody and has enlarged nodes similar to those of a bamboo fishing pole. Most of the growing knotweed grew at the periphery where the plastic had be pushed back by rainfll and stormwater in the creek, but amazingly some knotweed survived under the plastic where small holes passed light. www.fosc.org /AL-Knotweed.htm   (837 words)

The Knotweed Project In western Pennsylvania, Japanese knotweed is considered an “invasive” plant species, originally introduced to the United States from Asia as an ornamental landscaping species in the early 19th century. According to the 3R2N biodiversity study, Knotweed occupies 6% of stream banks in the Pittsburgh Pool and 8% of stream banks in Allegheny County, sharing space with approximately 80 species of woody plants. Knotweed is likely to be a permanent part of the ongoing transformation of western Pennsylvania’s “natural” environment. slaggarden.cfa.cmu.edu /3r2n/knotweed   (268 words)

Japanese Knotweed (Polygonum cuspidatum) - A Noxious Weed in Washington   (Site not responding. Last check: 2007-10-12) Japanese knotweed is an escaped ornamental that is becoming increasingly common along stream corridors and rights-of-way in Washington. Because Japanese knotweed often grows along riparian corridors, we are considering it to be an invasive freshwater weed. Japanese knotweed was subsequently introduced to the U.S. for use in ornamental hedges and for erosion control (Pridham and Bing 1975). www.ecy.wa.gov /programs/wq/plants/weeds/aqua015.html   (467 words)

Japanese Knotweed In North America, knotweed is primarily spread by root expansion and vegetative regeneration of rhizomes and stems. Knotweed spreads quickly, forming dense stands that prevent regeneration of native vegetation and suppresses the growth of existing vegetation. Knotweed plants may be controlled by application of a systemic herbicide containing glyphosate (Roundup®) or triclopyr (Garlon 3A®) to the actively growing plants. www.fs.fed.us /r10/spf/fhp/leaflets/japanese_knotweed.htm   (1318 words)

Why is it a threat Knotweed is allelopathic; exudes toxins through root and rhizomes to inhibit germination and growth of other plants, native and ornamental. Knotweed creates a dense canopy, excluding the establishment of tree seedlings along riverbanks, which contribute woody debris to the river system and are important to fish habitat and survival. Both knotweed species were introduced from Japan as ornamental plants, are equally invasive and difficult to control. www.skamaniacounty.org /Noxious_Weeds/landownerknotweedinfo.htm   (450 words)

What is Knotweed? Japanese and Giant knotweed are both used as components in the nutraceutical, resveratrol, which is thought to have anti-oxidant and anti-aging properties. Knotweed has an appearance similar to bamboo, which may explain why it is sometimes called Japanese or Mexican bamboo. Though the purpose for introducing knotweed was largely ornamental, knotweed soon became known as a tenacious and aggressive plant species that could easily invade small cracks in the sidewalk, or choke more preferable plants. www.wisegeek.com /what-is-knotweed.htm   (380 words)

Japanese Knotweed Japanese knotweed is a non-native, aggressive perennial plant from Asia that spreads rapidly along waterways by means of its root/rhizome mass, which is disturbed and distributed in high water events and washes downstream to form new plants. Knotweed is relatively new to the Clackamas River Basin (1950s-1960s). Knotweed must be controlled before it is everywhere, as in the case of flberries, English Ivy, and Scotch Broom. www.clackamasriver.org /misc/index.htm   (170 words)

Environment Agency - Japanese Knotweed Information Japanese Knotweed was introduced to the UK as an ornamental plant during the 1800s. Although Japanese Knotweed is not toxic to humans, animals or other plants, it offers a poor habitat for native insects, birds and mammals. Any Japanese Knotweed polluted soil or plant material that you discard, intend to discard or are required to discard is likely to be classed as 'controlled waste' and should be accompanied by appropriate Waste Transfer documentation. www.netregs.gov.uk /netregs/processes/367836/?lang=_e   (1659 words)

Johnson County Secondary Roads   (Site not responding. Last check: 2007-10-12) Knotweed flowers from July to August and are followed soon after by small, winged fruits. Mowing of japanese knotweed is NOT a good alternative, as the small pieces chopped up can be thrown or carried by the mower and regrow in uninfested areas. Because japanese knotweed tends to grow near water sources, herbicide choices may be limited. www.johnson-county.com /secondaryroads/WeedComm/WeedSpecies/japaneseKnotweed.shtml   (713 words)

The Seattle Times: Local News: Knotweed battle keeps growing Knotweed's red segmented stalks resemble bamboo, but it only looks as if it could feed pandas or be made into a fishing pole. Knotweed has been looming on the radar screen recently for people who worry about nonnative plants such as English ivy, Himalayan flberry and the lake-choking Brazilian elodea once sold for aquariums. Knotweed, introduced from Japan and Asia, continues to spread and is on track to become one of the dominant plants on the planet, experts say. seattletimes.nwsource.com /html/localnews/2002034790_knotweed14m.html   (776 words)

WeedAlert.com Weed Listing (Prostrate Knotweed) Prostrate knotweed is probably the earliest of the summer annuals to germinate in the spring. Prostrate knotweed is a prostrate weed that produces a thin tap root and multiple branched stems. The flowers of knotweed are small pink to white and form in clusters in the leaf axis. www.weedalert.com /weed_pages/wa_prostrate_knotweed.htm   (265 words)

Knotweed Knotweed was introduced here as an ornamental from Asia by way of the UK, and has been able to spread rapidly in the Pacific Northwest. He will be asking landowners' permission to look for knotweed on their property; if it is found, he will treat it for them if they so desire. Because knotweed is extremely difficult to control by any other means, he will primarily be using an herbicide approved by NOAA for use near salmonid-bearing streams. www.jcwc.org /resources/knotweed.htm   (462 words)

Japanese Knotweed - Reynoutria japonica, species information page Knotweed reproduces primarily through it's root system, which may reach 18 meters (60 feet) in length, and quite capable of growing through tarmac, concrete and paving, doing extensive damage as it spreads. A dioecious plant so there are male ♂ and female ♀ flowers on separate plants, the majority of the plants outside their native habitat in Japan are female and are of a single clone, presumably from when it was introduced originally in the mid-19th century as an ornamental garden plant. The Japanese Knotweed Control Forum for Cornwall - This Group is supporting a countywide survey of Japanese Knotweed distribution by the Botanical Society of the British Isles. www.brickfieldspark.org /data/japaneseknotweed.htm   (782 words)

Plant Invaders of Mid-Atlantic Natural Areas: Japanese Knotweed Japanese knotweed occurs across the continent from Maine to Wisconsin, south to Louisiana and in scattered locations in the Midwest and Western states. Knotweed is commonly found near water sources, such as along streams and rivers, in low-lying areas, waste places and utility rights-of-way and around old home sites. Japanese knotweed is an extremely difficult plant to control due to its ability to re-grow from vegetative pieces and from seeds. www.nps.gov /plants/alien/pubs/midatlantic/pocu.htm   (423 words)

Japanese Knotweed Japanese knotweed, Japanese bamboo, Mexican bamboo, fleece-flower, Hancock’s curse Native to Japan, Japanese knotweed was introduced to the UK in 1825 as an ornamental. There are no biological controls for Japanese knotweed at this time. www.mda.state.mn.us /invasives/knotweed/default.htm   (356 words)

knotweed Japanese knotweed is a perennial shrub from Asia, introduced to North America in the late 1800's as an ornamental. In 1966, U.S. botanists considered Japanese knotweed to be one of the most persistent and aggressive of all perennial weeds. Japanese knotweed also reproduces to a lesser extent with seeds that spread primarily by waterways (streams, ditches, flooding). www.shim.bc.ca /invasivespecies/_private/Knotweed.htm   (823 words)

Invasive Plants of Ohio - Factsheet 10 - Japanese Knotweed Japanese knotweed is a non-native, semi-woody perennial that grows in large clumps reaching heights of 3-10 feet. Japanese knotweed was introduced from Asia as an ornamental in the late 19th century because of its unusual bamboo-like growth habit. Japanese knotweed grows quickly and aggressively by extensive rhizomes and forms dense thickets that exclude native vegetation and reduce wildlife habitat. www.dnr.state.oh.us /dnap/invasive/10japknotweed.htm   (542 words)

Knotweed Although its effectiveness for other purposes has not been verified, Knotweed has also been used as supportive treatment for pulmonary disorders, to inhibit perspiration in cases of tuberculosis, to promote urination, to stop bleeding in cases of hemorrhage, and to treat various skin disorders. Knotweed is a sturdy annual plant found in most temperate regions of the world. Knotweed extract is found in many cough syrups and diuretics (medicines used to flush excess fluid from the body). www.pdrhealth.com /drug_info/nmdrugprofiles/herbaldrugs/101630.shtml   (264 words)

Control of Knotweed So far all Japanese Knotweed plants recorded in the UK are female and all male plants have been shown to be hybrids. Japanese Knotweed material is regarded as ‘controlled waste’ and not disposing of it properly would be an offence under the Environmental Protection Act, 1990. Japanese Knotweed is used as animal fodder in the Far East and here in Britain it is known that cattle, sheep, horses, donkeys and goats graze the plant. www.devon.gov.uk /index/environment/natural_environment/biodiversity/japanese_knotweed/control_of_knotweed.htm   (2155 words)

Information about Japanese Knotweed - Polygonum cuspidatum Description and VariationDescription and Variation: Japanese knotweed is a perennial species with spreading rhizomes and numerous reddish-brown, freely branched stems. Japanese knotweed was subsequently introduced to the United States for use in ornamental hedges and for erosion control (Pridham and Bing 1975). Rationale for listing: Japanese knotweed is an escaped ornamental that is becoming increasingly common along stream sides and rights-of-way in Washington. www.nwcb.wa.gov /weed_info/Written_findings/Polygonum_cuspidatum.html   (572 words)

Exeter City Council - Japanese Knotweed Japanese Knotweed (scientific name Fallopia japonica) was introduced to the UK in the mid nineteenth century as an ornamental plant. If the Knotweed is sparsely distributed, use 2,4D amine, which is specific to broad leaved plants and will not harm the grasses. Knotweed is unsightly and it is displacing our native plants, reducing biodiversity. www.exeter.gov.uk /index.aspx?articleid=1632   (868 words)

Prostrate Knotweed (Polygonum arenastrum) The foliage of Prostrate Knotweed is often blue-green in appearance. Prostrate Knotweed is a common plant that occurs in every county of Illinois. (Knotweeds) with a prostrate or spreading habit have been subjected to various taxonomic classifications through the years. www.illinoiswildflowers.info /weeds/plants/pros_knotweed.htm   (559 words)

The Nature Conservancy in Connecticut - Invasive Plant Fact Sheet/Japanese Knotweed Description: Japanese knotweed is a fast-growing herbaceous perennial that grows in large clumps three to six feet in height. Distribution: Native to Japan, Japanese knotweed was introduced into the United States in the late 1800s as an ornamental. Japanese knotweed is also known by the common names Mexican bamboo and Japanese fleece flower. www.nature.org /wherewework/northamerica/states/connecticut/science/art323.html   (636 words)

Japanese Knotweed - Biological Control of Invasive Plants in the Eastern United States Japanese knotweed spreads quickly to form dense thickets that exclude native species and are of little value to wildlife, leading to it being described as an environmental weed (Holzner, 1982). Japanese knotweed was independently classified as Reynoutria japonica by Houttuyn in 1777 and as P. Regeneration of Japanese knotweed (Fallopia japonica) from rhizome and www.invasive.org /eastern/biocontrol/12Knotweed.html   (3660 words)

The Nature Conservancy in North Carolina - Japanese Knotweed Japanese knotweed is on the worst pest list for the The Nature Conservancy's North Carolina mountain region. Stems of Japanese knotweed are smooth, stout and swollen at joints where the leaf meets the stem. Japanese knotweed spreads primarily through rhizomes and is often introduced as a contaminant in fill dirt. www.nature.org /wherewework/northamerica/states/northcarolina/initiatives/art12746.html   (236 words)

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