Japanese Knotweed

Debate between Lord Gardiner of Kimble and Lord Blunkett

Tuesday 7th November 2017 Lords Chamber

[Lord Gardiner of Kimble]

There are good examples of where local action groups have worked effectively and eradicated Japanese knotweed. In Defra we have an official who is co-ordinating the work of the local action groups. I very much endorse their work and think it is the way forward. However, research shows that we should be looking for a more robust psyllid. We have released in 16 sites this year 120,000 psyllids and I hope we will see some progress in that regard.

[Lord Blunkett (Lab)]

My Lords, there is another very invasive species called the US crayfish, which destroys riverbanks and fish and other life in the river. Like knotweed—I got there—it can be consumed. Unfortunately, however, the licence to do so is only partial across the south and part of the Midlands; in the north of England, Scotland and Wales they simply have to be destroyed. Will the Minister consider, alongside the measures on knotweed, ensuring that we can get a grip on the US crayfish problem?

[Lord Gardiner of Kimble]

My Lords, I am well aware of what the noble Lord said about crayfish—this is why they are non-native invasive species—and of the importance of seeking to manage and, wherever we can control and eradicate them. They are very bad news for our watercourses. I will look into the problem, but it is very much a matter for Natural England.