All of this is to say that control and removal of Japanese knotweed is serious business. It has arrived here in Canada. Homeowner’s Guide to Japanese Knotweed Control Developed by the Northwoods Cooperative Weed Management Area 7/2007 Japanese knotweed (Polygonum cuspidatum) is a non-native invasive species that threatens our community. In Ontario where the existing Knotweed distributions are not as well documented, both the minimum temperature threshold and limited degree days will prevent large-scale invasions of Japanese Knotweed in Northern Ontario. It Ontario law has prohibited the use of glyphosate for plant eradication conducted for aesthetic purposes since 2009. A personal account of trying to eradicate Japanese Knotweed, false bamboo in Northern Ontario This rapidly growing plant is quick to shade out native species and garden cultivars. Japanese knotweed has come a long way since Philipp Franz von Siebold, the doctor-in-residence for the Dutch at Nagasaki, brought it to the Utrecht plant fair in the Netherlands in the 1840s. False Bamboo,Japanese Knotweed is an invasive garden plant that can form an dense thicket and kill all the existing plant species in the area it grows in. Before removing Japanese Knotweed, we conduct a full site survey, this allows our specialists to evaluate the infestation and advise you on the best removal method to ensure we eradicate your Japanese Knotweed for good at the best possible price.. Upload your photo of suspected Japanese Knotweed to get a free assessment! Japanese Knotweed removal surveys. But the Ontario Invasive Plant Council, an advocacy group, wrote that the ban does not apply to glyphosate usage for knotweed removal. The Japanese Knotweed isn't just Britain's problem. 3 talking about this. “Japanese Knotweed, Polygonum cuspidatum, or Fallopia japonica is an aggressive semi woody perennial introduced to Canada in the 1800’s as an ornamental plant.” “Japanese Knotweed spreads via huge underground roots (rhizomes), that can grow 2 metres deep and 15 metres horizontally away from the above ground clump of stems. Range map for Japanese Knotweed (Fallopia japonica). The entire Province/State is coloured, regardless of where in that Province/State it occurs. Using results from known BC Knotweed sites, a precipitation threshold of 735 mm/year was identified for Japanese Knotweed. Just ask Joe Cindrich, of Langley B.C. PLEASE NOTE: A coloured Province or State means this species occurs somewhere in that Province/State. Yes, the easiest choice might be to grab a bottle of the herbicide known as glyphosate (which is the main ingredient in Roundup), but this chemical has been linked to cancer and is known to have a negative impact on aquatic life and the gut bacteria of important creatures, such as like pollinating bees. Any Japanese knotweed removal work that requires excavation and removal of infested soil and ground materials, will usually prove to be more costly than chemical methods. Japanese knotweed has a strong root system and can spread about 10 metres from the parent stem and has the ability to grow through concrete and asphalt. In 1850, von Siebold sent a specimen of Japanese knotweed to Kew Gardens in London and by 1854, knotweed had travelled as far as the Royal Botanical Gardens in … Illegal in UK, banned in BC and of great concern through out Ontario.

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