By Ben Price
The world’s largest field trial on the control of Japanese knotweed, conducted in Wales, has found that eradicating the plant is not possible.
Researchers from Swansea University have carried out extensive trials on the invasive plant at sites in Taff’s Well, near Cardiff, and Swansea.
The team tested all 19 of the main methods of controlling the plant.
They say eradication is not possible, but working with the plant’s biology produces the best results.
The methods used were physical, chemical and an integrated approach.