Most areas of England have been invaded by the fast growing Japanese Knotweed plant which grows at a rate of a metre a month and causes damage to tarmac pavements, buildings, drains and other structures. It is very difficult to kill and it also kills off our native species by literally smothering them.
The Commonwealth Agricultural Bureau is to introduce a bug which is a kind of louse and sucks the sap from the plants, killing them off, at two secret locations. Tests on ninety native plants have shown that the bug will not attack other plants, but many local river authorities, including the South Cumbria Rivers Trust have their doubts about it.
Historically, trying to introduce biological controls into a non native environment has not been successful and there are serious concerns about introducing these insects. It seems that river authorities in Cumbria will find their own methods for dealing with this problem weed.
If this experiment gets out of hand how do they propose to stop it? Has anyone thought about that? Once these insects are released into the wild there is certainly no way of putting them back into the bottle again.
On the other hand, if it should be successful and the lice suck their way through all the Japanese Knotwood out there, what will they eat next. Will it be our native rhododendrons, or rose bushes, our oak trees or wildflowers?
Tampering with the balance of nature is a dangerous gave with unpredictable results.


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