Japanese Knotweed

Debate between Lord Gardiner of Kimble and Lord Greaves

Thursday 16th May 2019 Lords Chamber

[Lord Greaves]

To ask Her Majesty’s Government what recent steps they have taken to eradicate Japanese knotweed.

[The Parliamentary Under-Secretary of State, Department for Environment, Food and Rural Affairs (Lord Gardiner of Kimble) (Con)]

My Lords, we are trialling biocontrol methods to control Japanese knotweed. The Centre for Agriculture and Bioscience International is working to establish the highly specific psyllid, Aphalara itadori, into the United Kingdom. This summer, a population of a more climatically suitable psyllid from Japan will be brought here. It is hoped that this will be the key to unlocking the potential of this agent to reduce the effort and cost of managing Japanese knotweed and its invasive capacity.

[Lord Greaves (LD)]

My Lords, it is 30 years since Lady Sharples started asking questions about Japanese knotweed, and about 12 or 15 since I joined her, but all we get is the same answer every time: that this wonderful psyllid, Aphalara, will come galloping over the horizon and solve everything. It is absolutely clear that the problem of Japanese knotweed is getting worse and worse and causing more and more problems, and it is simply not being tackled. Do the Government agree that two things need doing? First, owners of land need to be put under a legal obligation to eradicate Japanese knotweed, and allowing it to grow should be an offence. Secondly, when transactions or contracts are made relating to land that has Japanese knotweed on it, or when people walk on it and may spread it, they should be notified that this dreadful, awful weed exists or has recently existed on that land.

[Lord Gardiner of Kimble]

My Lords, trials often take longer than we wish, but I assure the noble Lord that we are collaborating with Canada, because it has a similar problem, and with experts across Europe and the United States. I agree: it is frustrating that the psyllid has not established as we wished. We are working on another form of control, which is also under evaluation: a mycoherbicide. This is all part of using the science. I agree with the noble Lord that it is very invasive. That is why I will read some of the advice in the Science and Technology Committee report that came out this morning. We need to attend to this. The problem with the noble Lord’s first point is that, if someone fly-tips spoil with elements of Japanese knotweed, will the landowner really be required to remove that fly-tip? That is the problem if you make it a legal liability on the landowner to remove it.

Japanese Knotweed

Debate between Lord Gardiner of Kimble and Lord Greaves

Tuesday 7th November 2017 Lords Chamber

[Lord Greaves (LD)]

My Lords, I pay tribute yet again to the noble Baroness, Lady Sharples, for her persistence in this matter. I am very sorry she cannot be here today and, if she is poorly, I hope she gets better as quickly as possible. The Minister referred to a two-pronged approach but over the years the Government have put too much hope on the prospect of armies of jumping psyllids crossing the land, chewing the knotweed in their path and getting rid of it. That will not be the answer, not for a long time at least. Is not the answer in the short run the work of local action groups, local authorities and others, to which the Minister referred? Is it not the case that the Government ought to be giving a lot more strong advice to local authorities to get on with it, because this stuff can and ought to be removed?

[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.

Brexit: Non-chemical Farming Methods

Debate between Lord Gardiner of Kimble and Lord Greaves

Monday 6th November 2017 Lords Chamber

[Lord Gardiner of Kimble]

My Lords, on the issue of yields, the use of pesticides is precisely to protect crops and grassland. Obviously, we need to use them carefully and have them well regulated. Without pesticides, undoubtedly yields would be reduced. The most important thing is that there is active co-operation on this now: 4.4 million hectares of land are involved in the voluntary initiative and the integrated pest management situation. All of that is strong news.

[Lord Greaves (LD)]

My Lords, the comprehensive codes of practice issued by the department and Natural England include advice on how to deal with rights of way and other areas for public access in places that are treated with pesticides. Do the Government have any hard evidence on how effective those codes of guidance are in relation to recreational users of the countryside?