This has label recommendation for controlling Japanese knotweed, instructing it to be applied to the cut canes or a foliar spray. Roundup Ultra also has label control for this weed Alternatively, try ...
But the benefits this weed provides in attracting birds are far outweighed by the invasiveness of this species. If you find it growing in your yard, you should eradicate it as much as you can, and ...
Weed barriers or landscape fabrics applied over ... Shumard oak, red maple, Japanese maple, flowering pear and Chinese pistachio. Shrubs such as sumac, Virginia willow and deciduous viburnums ...