Japanes Knotweed - how to kill it forever ?
Dear All,
I have a couple of areas on my property that appear to be infested with Japanese Knotweed. I keep cutting it down, but it keeps growing right back up again - and it grows fast so I have to go out and kill off all the new shoots every two weeks or so. Any idea as to how to get rif of it for ever ? I have heard that you don't want to dig it up as it will rejuvenate even from the tiniest bit of rhizome. |
Japanes Knotweed - how to kill it forever ?
adm wrote: Dear All, I have a couple of areas on my property that appear to be infested with Japanese Knotweed. I keep cutting it down, but it keeps growing right back up again - and it grows fast so I have to go out and kill off all the new shoots every two weeks or so. Chemical and physical attack combined offer the best hope of success. But it will take one or two seasons of near scorched earth policy to get rid of it. Any idea as to how to get rif of it for ever ? I have heard that you don't want to dig it up as it will rejuvenate even from the tiniest bit of rhizome. Although this is true it is not to be so easy for it to regrow from smaller pieces of rhizome after they have been hit with glyphosate or SBK. I suspect that you get a better kill by using it at a lower dilution than is normally recommended so that there is more time for the systemic effects to permeate the entire root system. There must be a FAQ somewhere on what people have found most effective. It grows very fast when it is warm so you must keep on top of it regularly. Regards, Martin Brown |
Japanes Knotweed - how to kill it forever ?
wrote in message oups.com... adm wrote: Dear All, I have a couple of areas on my property that appear to be infested with Japanese Knotweed. I keep cutting it down, but it keeps growing right back up again - and it grows fast so I have to go out and kill off all the new shoots every two weeks or so. Chemical and physical attack combined offer the best hope of success. But it will take one or two seasons of near scorched earth policy to get rid of it. Any idea as to how to get rif of it for ever ? I have heard that you don't want to dig it up as it will rejuvenate even from the tiniest bit of rhizome. Although this is true it is not to be so easy for it to regrow from smaller pieces of rhizome after they have been hit with glyphosate or SBK. I suspect that you get a better kill by using it at a lower dilution than is normally recommended so that there is more time for the systemic effects to permeate the entire root system. There must be a FAQ somewhere on what people have found most effective. It grows very fast when it is warm so you must keep on top of it regularly. Thanks Martin, How about cutting the bugger down and then using a syringe to squirt glyphosphate into the hollow stems ? It certainly does grow fast - I hate those litte red shoots, it seems that if I don't get them RIGHT NOW, by the time I turn my head, they've grown six inches..... Regards, Martin Brown |
Japanes Knotweed - how to kill it forever ?
On 20 Jun 2006 06:02:17 -0700, wrote:
adm wrote: Dear All, I have a couple of areas on my property that appear to be infested with Japanese Knotweed. I keep cutting it down, but it keeps growing right back up again - and it grows fast so I have to go out and kill off all the new shoots every two weeks or so. Chemical and physical attack combined offer the best hope of success. But it will take one or two seasons of near scorched earth policy to get rid of it. Any idea as to how to get rif of it for ever ? I have heard that you don't want to dig it up as it will rejuvenate even from the tiniest bit of rhizome. Although this is true it is not to be so easy for it to regrow from smaller pieces of rhizome after they have been hit with glyphosate or SBK. I suspect that you get a better kill by using it at a lower dilution than is normally recommended so that there is more time for the systemic effects to permeate the entire root system. There must be a FAQ somewhere on what people have found most effective. It grows very fast when it is warm so you must keep on top of it regularly. Regards, Martin Brown Whatever you do don't seek advice from North Tyneside Council who actively, or perhaps carelessly, planted an enormous bank of it last year. I believe that is illegal, but who is going to do anything? -- Jim Tyneside UK http://www.jimscot.plus.com |
Japanes Knotweed - how to kill it forever ?
"adm" wrote How about cutting the bugger down and then using a syringe to squirt glyphosphate into the hollow stems ? That is what the NT do (with SBK or similar) and it works well, kills the roots which can be 3m down. Slow process but effective. -- Regards Bob Hobden 17mls W. of London.UK |
Japanes Knotweed - how to kill it forever ?
"adm" wrote in message ... Dear All, I have a couple of areas on my property that appear to be infested with Japanese Knotweed. I keep cutting it down, but it keeps growing right back up again - and it grows fast so I have to go out and kill off all the new shoots every two weeks or so. Any idea as to how to get rif of it for ever ? I have heard that you don't want to dig it up as it will rejuvenate even from the tiniest bit of rhizome. Nuclear weapons seem to be the general consensus :~(( This may help: http://www.projects.ex.ac.uk/knotweed/control_it.htm Jenny |
Japanes Knotweed - how to kill it forever ?
Jim Scott wrote: On 20 Jun 2006 06:02:17 -0700, wrote: There must be a FAQ somewhere on what people have found most effective. It grows very fast when it is warm so you must keep on top of it regularly. Whatever you do don't seek advice from North Tyneside Council who actively, or perhaps carelessly, planted an enormous bank of it last year. I believe that is illegal, but who is going to do anything? Contrary to the wildlife and countryside act, 1981 to spread the stuff irresponsibly see for example http://www.projects.ex.ac.uk/knotweed/ Some hints on knotweed management there too. (strangely it isn't a pest in it's native habitat) Although I was once told that our version is a unusual sport of the original Japanese plant. Regards, Martin Brown |
Japanes Knotweed - how to kill it forever ?
...North Tyneside Council who actively,
or perhaps carelessly, planted an enormous bank of it last year. why? -- Hayley (gardening on well drained, alkaline clay in Somerset) |
Japanes Knotweed - how to kill it forever ?
On Tue, 20 Jun 2006 20:11:43 GMT, H Ryder wrote:
...North Tyneside Council who actively, or perhaps carelessly, planted an enormous bank of it last year. why? During reconstruction work near a large grassy bank near the coast the contractors must have used topsoil containing the weed over the plastic mesh. -- Jim Tyneside UK http://www.jimscot.plus.com |
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We have a lot of Knotweed in BC. And it's tough to get rid of. But, if you don't mind killing this invasive species. Do what I did. Cut the plant stems close to the ground. ROCKSALT! Put 3 or more heaping cups of ROCKSALT on the roots. Pour about 1/2 gallon of very, very HOT water slowly on the salt. This kills the mothers (DEAD) Cover with a cup or 2 of ROCKSALT and let stand. A rather aggressive way to get rid of this plant, but a permanent fix. Make sure that there are no bushes, grass, plants, or other (alive) things that you want to keep in the vicinity of the SALT. |
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Going back to OP's original post, actually it would be a much clever trick to kill something temporarily. |
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