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Japanese Knotweed Herbicide Application

Applications of specialised herbicides are undertaken by our fully NPTC qualified and experienced sprayers. This can be a cost effective treatment solution though treatment is often required over a number of years. It involves coating the plant leaves with a fine spray via knapsack spraying enabling the herbicide to be absorbed into the rhizome through the leaves.

Stem Injection

This system is an effective solution when dealing with smaller concentrations of knotweed. It is environmentally friendly with no adverse effects on vegetation or wildlife and is ideal for use near water or on sensitive sites.

It involves injecting herbicide into the Japanese knotweed stems close to where the stem emerges from the soil. This method is particularly useful where spray drift has to be avoided. However, it’s also possible to overdose the knotweed, leading to a dormancy reaction which can fool people into believing that the knotweed has been killed off.

Relocation and Herbicide Treatment

On large development sites Japanese knotweed can be moved to specified treatment bunds or stockpile areas. This releases development areas and enables the bunds to be treated with an appropriate herbicide programme. This soil is placed on a geo-textile membrane and monitored as it continues to grow; once the plant has grown, we will treat it using herbicides until it is eradicated. This type of industrial knotweed treatment minimises disruption and helps to keep costs down.

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About Henderson and Taylor

Henderson & Taylor brings together three separate operating companies collaborating across multi-disciplinary projects throughout the UK, whilst also providing commercial and back office support. All of our UK companies; Henderson & Taylor (Public Works), Henderson & Taylor Facilities Management and Henderson & Taylor Building Services have a long and successful heritage of Asphalt Surfacing, Drainage and Sewer Works, Car Park Construction, Roadway Construction, Bridge and Large Structure Construction, Site Clearance and Demolition, Land Remediation, Traffic Management and Design, Landscaping, S278 Works, Road Marking, Residential Extensions, Brickwork, Fitted Kitchen and Bathroom Installation, Refurbishments, New Housing Construction, Invasive Weed Services, and Japanese Knotweed Removal.

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