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Robert Junior
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Robert Junior is offline
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21-05-2018, 11:00 PM
21

Re: Japanese Knotweed

I found this on the internet

This method tho experimental may offer hope
In terms of control, Japanese knotweed is obviously extremely difficult. Digging the weed out is certainly the most environmentally friendly method; however, it is back breaking work considering the roots can travel so far and that the smallest rhizome can produce an entirely new plant.

In terms of chemical sprays, Glyphosate is the most viable option. Applied to the leaves, it is absorbed by the entire plant and is capable, after a few years, of killing this troublesome weed.

A relatively new option, however, is biological control using psyllid (plant-sucking bugs). Currently on trial, if this method proves successful, hopefully, it will be offered to gardeners up and down the UK.

TELEGRAPH.
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21-05-2018, 11:31 PM
22

Re: Japanese Knotweed

That's interesting Robert - about the bug control I mean.
Hope it works because the less chemicals we need use the better.
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22-05-2018, 05:55 AM
23

Re: Japanese Knotweed

Hi

Any plant can be killed simply by using a strong acid or alkali.

The problem is you effectively sterilise the soil for months and must then bring the ph back to normal.
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22-05-2018, 06:36 AM
24

Re: Japanese Knotweed

I worry when they introduce new bugs to deal with a problem...they always seem to create a new bigger problem.
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22-05-2018, 09:39 AM
25

Re: Japanese Knotweed

There was some on a piece of waste ground near our community centre a few years back and the council got rid of it somehow, it certainly has not returned.
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22-05-2018, 09:52 AM
26

Re: Japanese Knotweed

Originally Posted by Purwell ->
There was some on a piece of waste ground near our community centre a few years back and the council got rid of it somehow, it certainly has not returned.

All these remedies make me wonder why the University has been trying for 5 years and still can't kill it permanently.

Found the link about the Uni's experiments:

https://www.walesonline.co.uk/news/w...d-off-14573724
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22-05-2018, 10:46 AM
27

Re: Japanese Knotweed

Originally Posted by Mups ->
All these remedies make me wonder why the University has been trying for 5 years and still can't kill it permanently.

Found the link about the Uni's experiments:

https://www.walesonline.co.uk/news/w...d-off-14573724
That is strange because the council did not dig it up in the area I am talking about, in fact they left the cut stems about a foot from the ground but it all died off.
I have no idea what they put on it but grass is growing in that spot now so it could not have been too toxic.
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22-05-2018, 11:59 AM
28

Re: Japanese Knotweed

Originally Posted by Purwell ->
That is strange because the council did not dig it up in the area I am talking about, in fact they left the cut stems about a foot from the ground but it all died off.
I have no idea what they put on it but grass is growing in that spot now so it could not have been too toxic.


I don't understand it either Purwell.
So much conflicting advice isn't there.
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22-05-2018, 01:11 PM
29

Re: Japanese Knotweed

Maybe the university wanted more funds to carry out more research?
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22-05-2018, 01:33 PM
30

Re: Japanese Knotweed

I have just taken these pictures, of the Japanese Knotweed, the surgery part has been sectioned off,but if you look over the wooden fence,into the neighbours garden,it's like a jungle.


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