May 5, 2008
Story Timeline: 215 days
The Japanese Knotweed Polygonum cuspidatumis a major pest. Extremely invasive it has been estimated that the total amount of the plant in the Swansea area alone weighs 62,000 tonnes (equivalent to 40 blue whales). Interestingly every specimen in Europe (and some in the USA) is a clone of the same...
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