Posted: Sun Jan 16, 05 9:03 am Post subject: Foreign Invaders
Radio 4 Mon-Fri 15:45 Foreign Invaders
The story of five plants which have invaded foreign shores causing massive ecological and economic damage. It is a story of invasion by stealth; plants that have invaded our shores and now threaten our coasts, clog our rivers, colonise our commons and take over our gardens.
1/5. Tony Russell reports on the menace of Japanese Knotweed. It was a much-prized plant introduced by the Victorians but it's now estimated it will cost more that �1.5 billion to eradicate from these shores.
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