Japanese knotweed again!

casper_g

puddy wrote: »

not at the strength you need it for this stuff

Glyphosate is readily available in the form of powder or liquid concentrate, to be made up to whatever strength is needed. You can buy it from any garden centre, or from (to give just one example) B&Q.

Cyril

This stuff is not weeds as we know them it was large foliation with bloomin thick stalks n stems hence the reason a digger was brought in to clear it and dig up the roots and then burnt.

I can't see how a bottle of roundup will do the job.

Mojisola

devotee wrote: »

Well not really, the communal garden belongs to all flats, including the one I'd be buying, but in addition to that I'll have a private garden as well.

Are you going to fund its removal from the communal garden by yourself? If not, you will be relying on others coming up with the money to pay for it.

devotee

Mojisola wrote: »

Are you going to fund its removal from the communal garden by yourself? If not, you will be relying on others coming up with the money to pay for it.

Yes, there is a service charge to deal with that. And only 7 flats all owner occupied.
I wouldn't have known about the knotweed until the freeholder discovered it recently, so they would be organising the treatment.
The place is very well maintained.

daveyjp

Cyril wrote: »

This stuff is not weeds as we know them it was large foliation with bloomin thick stalks n stems hence the reason a digger was brought in to clear it and dig up the roots and then burnt.

I can't see how a bottle of roundup will do the job.

I haven't seen the Beeny prgramme, Roundup does work, but it needs time - 2-3 years. It will find it's way to all the root system and kill the plant.

Digging out may leave rhizome and a small piece will grow back within 12 months. So you could spend thousands digging it out, then have to spray anyway.

poppysarah

daveyjp wrote: »

I haven't seen the Beeny prgramme, Roundup does work, but it needs time - 2-3 years. It will find it's way to all the root system and kill the plant.

Digging out may leave rhizome and a small piece will grow back within 12 months. So you could spend thousands digging it out, then have to spray anyway.

The point is it's a controlled waste so you can't just dig it out and move it.

You have to burn it on site or get someone to remove it officially for you.

You have to keep cutting growth, spraying new growth and over several attempts it'll all be dead and gone.

cut, let grow, spray, disturb roots, let grow, spray, dig, burn the stuff you dig up (which probably means letting it dry out)

Even a small bit will regrow which is why you have to keep checking it over so long.

puddy

Cyril wrote: »

This stuff is not weeds as we know them it was large foliation with bloomin thick stalks n stems hence the reason a digger was brought in to clear it and dig up the roots and then burnt.

I can't see how a bottle of roundup will do the job.

it wont...........

casper_g

puddy wrote: »

it wont...........

No, it won't I certainly didn't mean to imply it would. JK can be killed with glyphosate, but not in the same way you might put a squirt on a dandelion on your driveway. From a previous thread, the pros would go round and inject high-strength glyphosate into the stems one by one, individually, then wait for it all to die back. Then they'd inspect periodically and re-treat as needed over the course of several years. I haven't been through this myself but it sounds like getting rid of this stuff is a task requiring some determination as well as expertise!

cajef

puddy wrote: »

it wont...........

So you have had experience of JK eradication, or is this just your opinion and before you ask yes I have and Glysophate does work but it is not just a simple job of spraying it.

cajef

casper_g wrote: »

I haven't been through this myself but it sounds like getting rid of this stuff is a task requiring some determination as well as expertise!

You are correct, there is a mine of misinformation in this thread and one poster is just scaremongering.

JK is pretty widespread here in Cornwall, but is can be controlled and eventually eradicated over a period of years but it does need perseverance.

If the foliage is sprayed with glysophate in the autumn as it begins to die back it will go down into the rhizome and eventually kill it also the stems can be injected as they begin to die back.

If people just mow it or start digging it up without treating it first it can and will spread unless done by specialist companies.

From discussions with our local council official who is responsible for control of JK in the county talks are being held with mortgage lenders re people obtaining loans for properties that may be affected by JK in their locality.