Can Knotweed Be Eradicated

The world’s largest field trial on the control of Japanese knotweed, conducted in Wales, has found that eradicating the plant is not possible. … The team tested all 19 of the main methods of controlling the plant. Based on their three years of research, they say eradication is not possible in the short term.

Can you completely eradicate Japanese knotweed?

Despite claims by some companies, Japanese knotweed cannot be killed or eradicated by herbicide application alone. It can be controlled via herbicide treatment or fully removed from a property by excavation. Often, the most cost-effective method of controlling Japanese knotweed is a Herbicide Treatment Programme (HTP).

How long does it take to eradicate Japanese knotweed?

It usually takes at least three to four seasons to eradicate Japanese knotweed using weedkiller. Professional contractors, however, will have access to more powerful weedkiller that may reduce this period by half.