| Page 2 of 2 | 1 | 2 |
|
|
Knotweed
On 11/07/2016 23:10, Stewart Robert Hinsley wrote:
On 09/07/2016 13:38, Janet wrote: In article , says... It will take a couple of years of treatment to fully eradicate though so don't expect to get it all in one go. I daily drove past a 'colony' and watched as it was treated for, aprox, 3 years before it was completely eliminated. Its tough stuff! Our local council has been spraying several local colonies of JKW for several yesrs. You can see the deadly effect every time they treat it, but the next year it rises from the grave again. AFAIK, in the UK climate JKW does not propagate by seed; so a colony's survival after weedkilling is not down to seed germination; it reflects the depth, extent and vigour of its root systems. My understanding is that the reason for a lack of seed propagation is not the climate but that the plants are (nearly?) all female, so they never (hardly ever) get pollinated. You do get hybrids with Russian vine and giant knotweed. But it's remarkably widespread for a plant that doesn't propagate by seed. Janet Janet It is remarkable how small a piece will regrow, even the mush on a strimmer will produce viable plants if put in a nice spot! It has become a much bigger problem down here once they started getting excited about it and lenders not giving mortgages etc, people panic, try and dig it up and fly tip it. Weed killer and persistence is the way to go -- Charlie Pridham, Gardening in Cornwall www.roselandhouse.co.uk National collections of Clematis viticella & Lapageria rosea |
Knotweed
In article ,
says... On 09/07/2016 13:38, Janet wrote: In article , says... On Sat, 09 Jul 2016 08:07:37 +0100, Chris Hogg wrote: On Fri, 8 Jul 2016 22:30:48 +0100, Big Les Wade wrote: Spider posted Sorry to rant at you, Stephen, but you really must get rid of that knotweed before you regret it. Doesn't glyphosate do it? ISTR that the best way to treat it is, as you say, with glyphosate, but specifically towards the end of the summer or early autumn, cut it off at about 3 ft, and pour a half-strength glyphosate solution into the hollow stems. The glyphosate is then slowly absorbed and taken down into the root as the plant dies back in the autumn, never to emerge in the spring. It will take a couple of years of treatment to fully eradicate though so don't expect to get it all in one go. I daily drove past a 'colony' and watched as it was treated for, aprox, 3 years before it was completely eliminated. Its tough stuff! Our local council has been spraying several local colonies of JKW for several yesrs. You can see the deadly effect every time they treat it, but the next year it rises from the grave again. AFAIK, in the UK climate JKW does not propagate by seed; so a colony's survival after weedkilling is not down to seed germination; it reflects the depth, extent and vigour of its root systems. My understanding is that the reason for a lack of seed propagation is not the climate but that the plants are (nearly?) all female, so they never (hardly ever) get pollinated. You do get hybrids with Russian vine and giant knotweed. What a nightmare plant that hybrid must be :-) Mile a minute knotweed , doersn't bear thinking about. But it's remarkably widespread for a plant that doesn't propagate by seed. Janet |
Knotweed
On 12/07/2016 00:58, Janet wrote:
In article , says... On 09/07/2016 13:38, Janet wrote: In article , says... On Sat, 09 Jul 2016 08:07:37 +0100, Chris Hogg wrote: On Fri, 8 Jul 2016 22:30:48 +0100, Big Les Wade wrote: Spider posted Sorry to rant at you, Stephen, but you really must get rid of that knotweed before you regret it. Doesn't glyphosate do it? ISTR that the best way to treat it is, as you say, with glyphosate, but specifically towards the end of the summer or early autumn, cut it off at about 3 ft, and pour a half-strength glyphosate solution into the hollow stems. The glyphosate is then slowly absorbed and taken down into the root as the plant dies back in the autumn, never to emerge in the spring. It will take a couple of years of treatment to fully eradicate though so don't expect to get it all in one go. I daily drove past a 'colony' and watched as it was treated for, aprox, 3 years before it was completely eliminated. Its tough stuff! Our local council has been spraying several local colonies of JKW for several yesrs. You can see the deadly effect every time they treat it, but the next year it rises from the grave again. AFAIK, in the UK climate JKW does not propagate by seed; so a colony's survival after weedkilling is not down to seed germination; it reflects the depth, extent and vigour of its root systems. My understanding is that the reason for a lack of seed propagation is not the climate but that the plants are (nearly?) all female, so they never (hardly ever) get pollinated. You do get hybrids with Russian vine and giant knotweed. What a nightmare plant that hybrid must be :-) Mile a minute knotweed , doersn't bear thinking about. Well, I don't believe the Mile a Minute tag: 60 miles an hour?!! I've walked past it and never seen it so much as twitch. Unless it's moving so fast I can't actually see it, of course, but I suspect that's faster than 60mph. Let's just hope we never see that particular hybrid. But it's remarkably widespread for a plant that doesn't propagate by seed. Janet -- Spider On high ground in SE London Gardening on heavy clay |
| All times are GMT +1. The time now is 05:32 AM. |
|
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
GardenBanter