Invasive Species Control

Invasive Species Control

Awareness of the need to control invasive species, such as Rhododendron, Ragwort and Japanese Knotweed, is increasing. Japanese Knotweed, in particular, is frequently in the press – if it is anywhere in the vicinity it can place constraints on the planning, development and sale of sites.

Knighton Countryside Management can help by providing a full range of invasive species control measures to commercial sites and to domestic customers.

Initial walkover surveys
A written assessment and management plan
Herbicide Application
Hand pulling and cutting
Clearance & treatment of aquatic invasive species
Bio Hazard control measures to prevent further spread

There is in depth information available on Invasive Species on a number of websites. The Non-native Species Secretariat Site contains Identification Sheets and other useful references, including the full text of all the relevant legislation and regulations, and we are are always happy to discuss any specific issues.

Horse Tail
Invasive Aquatic Species
Giant Hogweed
Himalayan Balsam
Japanese Knotweed


Ragwort can be very difficult to eradicate one established, and the most effective methods seem to be a combination of herbicide application, and either hand or mechanical pulling. Knighton can offer both of these options. Importantly, we understand how crucial it is to keep pasture clear of any dead or dying plants to avoid damage to livestock. Pulling plants can be effective, but it is difficult to ensure that every fragment is removed, and the loosened soil is an ideal environment for regrowth. Really effective management requires a combination of approaches, including maintaining a good layer of grasses to restrict the ragwort’s ability to grow. Knighton Countryside will create an eradication and maintenance plan that suits the client’s requirements, so that you can be sure of the most efficient solution.
Our staff are fully trained in the use of herbicides, and we can offer a number of application methods.

Horsetail, Mare’s Tail: Equisetum Arvense
Horsetail is a fairly distinctive plant, and if not properly cleared and treated prior to construction it can reappear through driveways and footpaths.It can be treated with herbicide but ideally, the entire plants should be excavated and professionally checked to make sure that the entire rhizomes have been removed.Like Japanese Knotweed, the use of root barriers can be helpful when controlling the spread of this species. Fortunately, Knighton have all the equipment required to put these control measures in place, so even if the problem is discovered at the last minute, we can get there straight away to carry out the necessary treatment and so help you avoid costly delays to projects.

Buddleja Davidii
Buddleia is a popular garden plant. However, it produces large numbers of seeds and these are wind dispersed, and can then grow in large quantities in difficult to access areas. They can very soon take over if left untreated. Buddleia root systems can weaken structures, whether they be buildings or river banks, and early removal is a good idea.

When small, the plants can be hand or mechanically removed. Mature specimens can reach heights of 5 metres, and for larger plants an application of herbicide is an effective control measure. With our fleet of chippers and qualified chainsaw operators, we can take down, treat, and remove even large areas of buddleia with ease.