Japanese Knotwood

[razu13612]

Does anyone know of a permanent solution for an infestation of this persistent WEED............I know repeated doses of Round-Up will eventually kill the stuff, BUT I have pets who use the yard and live in the city. I'm really looking for something environmentally friendly......Thanks.

[Jess]

I'm afraid the answer is no. There is as yet nothing that permanently gets rid of it not even round-up unless you persist with it for many, many years.
They are at present doing studies on insects and pathogens that could be introduced from Japan but they have to make sure that whatever is introduced does not affect anything else. The results are expected in the next three years.
If you want vengeance you can always eat it. I have been told it makes an excellent jam!