The following project proves that the applications for our expertise are very diverse. On one occasion, NPI was able to provide a solution to the problem of the highly aggressive Japanese Knotweed. In Wageningen, a housing block was seriously affected by this invasive species.
Japanese knotweed
Compared to other common control methods, the installation of HDPE film is an effective way to combat Japanese knotweed. The 2.0 mm thick HDPE film is completely root-resistant. Chemical control often requires repeated applications, and manual removal almost always results in regrowth. Applying HDPE film provides a permanent physical barrier and completely blocks the plant from light, which is essential in controlling this invasive species.
The installation of Japanese knotweed
To deal firmly with this unwanted plant, earth was dug out from several gardens. 6 mm HDPE sheets were installed on the sides of the excavated ground, and a 2 mm HDPE film installed on the base of the pit. Drainage was installed on top of this and the excavated ground replaced. This created a closed basin, which was then free of Japanese Knotweed.
HDPE film and the control of Japanese knotweed
The use of HDPE film is an effective method for controlling Japanese knotweed, especially compared to other common control methods. The 2.0 mm thick film is completely root-resistant and forms a durable barrier against this invasive plant.
Chemical control often requires repeated applications, and manual removal almost always leads to regrowth. The application of HDPE film provides a permanent physical barrier and completely blocks the plant from light, which is essential in managing this invasive species.
