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Environet Consulting Ltd

Japanese Knotweed Herbicide Method

Herbicide Treatment of Japanese Knotweed

Japanese Knotweed herbicide method
  • A low cost alternative to excavation methods
  • Single Season treatment option
  • Low environmental impact
  • Guarantees can be provided

If you have Japanese knotweed on your land, and you leave it untreated, it will spread. It may cause damage and devalue the property. You may find yourself liable if it spreads beyond your boundary.

Herbicide treatments can be applied with the objective of either control to prevent further spread, or complete eradication if conditions permit. The typical period for herbicide application is between the months of May - October, although warmer weather can extend the growing season.

All work is carried out strictly in accordance with current legislation, including the Environmental Protection Act 1990, Wildlife and Countryside Act 1981, COSHH Regulations, Control of Pesticide Regulations and recognized industry guidance.

The effectiveness of the treatment relies upon maximum leaf coverage, an intact healthy stem and unbroken rhizome system. We recommend therefore that you avoid damaging the plant in any way e.g. by cutting, trampling, or disturbing the ground containing Japanese knotweed infested soil.

Stem injection methods can be used to reduce risk to adjacent non-target plants.

Useful Links

Environet on BBC One Show

Managing Japanese Knotweed on Development Sites – Code of Practice published by Environment Agency (5.5MB)

Japanese Knotweed – A Guide for Landowners and Developers published by Environet

Knotweed online Survey Form Fill out your details and we will send a quote

Japanese Knotweed – A Legal Perspective by Robert Twining, Warners Solicitors

Xtract Method Info published by Environet

knotweed leaf

Xtract™ - on site remediation for rapid guaranteed eradication of Japanese knotweed. More info


herbicide method

Herbicide treatment for the eradication or control of Japanese Knotweed. Suitable for commerical, residential and development sites. More info