If you are concerned about the risk to other plants, use a weed wiper to apply the herbicide instead of a spray. Soil should not be moved off-site – it may still be classed as controlled waste as it could still be contaminated with dormant rhizome. Japanese Knotweed Removal by Herbicide Injection . Developed for the professional lawn care operator, Trimec 992 is formulated to reduce costs and provide effective control – some weeds begin to show injury within hours. Single treatments are usually insufficient for complete control. Using an herbicide like glyphosate, traditionally found in commercial products like Roundup, is one of the best methods to kill Japanese Knotweed. The herbicide treatment used is a systemic translocating herbicide which kills the top of the plant as well as the rhizome or root. Clean implements thoroughly after use to prevent spread of fragments. We update information and advice on a regular basis. We use various chemicals to treat Japanese knotweed. The herbicide treatment is most efficient on a warm, sunny day. The herbicide treatment is most efficient on a warm, sunny day. It should instead be used in landscaping areas where it can be monitored. Japanese knotweed ( Fallopia japonica ) is a weed that spreads rapidly. Contact herbicides may appear to kill the leaves and shoots of knotweed, but unless the herbicide is translocated down to the rhizome the plant will regrow. Documenting occurrences In order to track the spread of an invasive species on a landscape scale, it is important to report populations where they occur. The most common and preferred treatment method is a herbicide treatment. During autumn the plant draws food stores from the dying leaves and canes, down to the rhizome. All rights reserved. Professional Insecticides; Biological Pest Control; Lawn Pest Control ; All Insecticides & Pest Control; Moss Control & Outdoor Cleaners. Roundup, Gallup, Landmaster, Pondmaster, Ranger, Rodeo, and Touchdown are all herbicides recommended to kill Japanese Knotweed. OakHouse Professional. Japanese Knotweed Specialists are one of the UK’s leading contractors and consultants in the control, treatment and removal of all Invasive Weeds, not just Japanese Knotweed. Though often confused with each other, there is little chance of confusing these imposing plants with any other species. While you could always use a glyphosate herbicide such as Roundup, this can be harmful to the environment. Once the site is declared free of any invasive plants, a completion certificate will then be issued. Finally, when removing Japanese Knotweed treated with herbicide, it will be classed as hazardous material according to The Hazardous Waste (England and Wales) Regulations 2005 and the removal must meet legal requirements. Fortunately, Japanese knotweed is susceptible to a range of herbicides including glyphosate, the active ingredient in products such as 'Roundup biactive' and 'Glyphos biactive'. This is an environmentally and cost effective solution, ideal for smaller patches of knotweed. Japanese Knotweed Killer Recipe. The information may be used freely for private and educational purposes but may not be copied for commercial use. For pre-emergent control, Nitrophos Barricadehas shown to be effective to keep Knotweed from germinating in the spring time. Roundup, which is comfortable and ready to use knotweed herbicides, requires no measuring or mixing. It is provided in good faith to raise awareness of the issues and to promote best practice in the control of Japanese knotweed. BEST MANAGEMENT PRACTICES King County Noxious Weed Control Program ... 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