On projects which are on a time limit, we are able to excavate the contaminated soil and store it in an isolated zone on-site for upcoming treatment with herbicide. In a precise move, the infestation can be quarantined inside of the site boundary, clearly signed and protected with a root barrier membrane in position. The membrane is there to prevent further contamination, leaving the main site available for continued development. The infestation would be treated at a later, more convenient time.
When the project is time limited and space restricted, we may have to excavate the infestation and then bury the contaminated soil in a specialised sealed membrane pod. The site must remain untouched after excavation and re-burial and clearly marked on all site plans. The Environment Agency will then need to be advised that this procedure has taken place and plans are approved with them.
The process involves the excavation of the soil then taking the contaminated soil off site to a licensed landfill by a licenced waste carrier. We have reasonable rates with landfill waste carriers that are licensed to take the contamination. Due to our experience we can substantially reduce the amount of waste taken off site by our highly qualified specialists, in root tracing.
Our unique stem injection process, which is proven to be the most cost effective and environmentally-friendly form of treatment. With Japanese Knotweed and other invasive plants inhabiting a vast number of development sites in the UK, and our reputation for excellent and effective treatment, we are sure we will continue to grow.
Stem injection involves injecting a concentrate of glyphosate herbicide into each cane of the weed using specialist equipment specifically designed in the treatment of Japanese knotweed.
Japanese knotweed absorbs the glyphosate into the rhizome with a faster absorbency rate than that of foliar spraying. Less risky to the environment, as the injected herbicide has no effect on the surrounding vegetation and is also safe to use near water, stem injection an effective eradication method.
Results can be seen in as little as a fortnight. From injection the weed goes dormant and noticeable signs of foliar deterioration appear within days after treatment. Any canes untreated during the course will be visible within the two-week period and a re-application carried out as part of the treatment process. Treatment is not affected by wind, rain or convection. Stem injection can be used at anytime during the growing season.
We also specialise in the treatment of Japanese knotweed on or near water by using the stem injection process, which minimises any risk to water and the environment. We have experience in survey and licence requirements and will ensure all documentation is filed and complete with the relevant government organisations.
Foliar application is useful for large swathes of infested sites that are not ecologically sensitive areas nor subject to strict treatment deadlines. Foliar spraying uses herbicides topically – the weed absorbs the herbicide through the leaves.
As such this takes time for the weed to absorb the herbicide down to its rhizome. Only then does this ensure no re-growth occurs. A number of treatments are required for effectiveness and may take up to 24 months to complete. Foliar spraying is dependent on weather conditions.