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A large, herbaceous perennial plant, Fallopia japonica, native to Asia; it is a highly invasive colonizer outside of its native territory.
Where the control of Japanese Knotweed is not feasible in situ the present lack of appropriate facilities will make disposal extremely restrictive to developers.
In the UK, the reproduction of Japanese knotweed is purely vegetative.
The control of the Japanese knotweed can only be achieved by killing the rhizome system, which may take a number of years.
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