Does Tordon* 22K reduce biodiversity because it is a residual product?
It is true that Tordon 22K is a residual broad-spectrum herbicide that can control a wide range of broad-leaved weeds. However, Tordon 22K is safe to grasses, which are an important habitat for many species of insects and birds. Additionally, trials on areas populated exclusively by Japanese knotweed have shown that in the year after application, when the Japanese knotweed has been killed, native species such as foxglove and bluebell recolonise the treated area. In this way the biodiversity of the treated area is improved, not reduced.
