Japanese Knotweed - how to kill?

Redsoxfan wrote: »

OK, if I have this bloody thing at all, it's a very small amount. I'd rather try and deal with it myself than paying someone at this stage.

This seems like it might be worth a try

http://topline.ie/garden-outdoors/lawn-garden/plant-lawn-care/lawn-feed-weed-killer/round-up/tree-stump-killer-250ml

I wouldn't advise doing it yourself if you're not absolutely sure what you're doing.
A piece the size of your nail will reproduce.
Spraying at the wrong time won't be effective. You should get and follow expert advice or get an expert in to treat it.
There's no 'saving money' solution here.

lanod2407 wrote: »

I wouldn't advise doing it yourself if you're not absolutely sure what you're doing.
A piece the size of your nail will reproduce.
Spraying at the wrong time won't be effective. You should get and follow expert advice or get an expert in to treat it.
There's no 'saving money' solution here.

Based on what I have read i won't be spraying it until September.

How much does it cost to address otherwise? I have seen figures of thousands mentioned.

punisher5112 wrote: »

Honest question would diesel not kill this? I don't condone just wondering or likes of kerosene.

Strongly advise that people follow what's recommended for JK. people have spent years looking for solutions and what's recommended is seen as best practice.

BTW - I saw a BBC article a while back. There's an insect in Japan that eats only JK. British Dept Ag have them in controlled conditions to see if they have any impact on the environment other than eating JK. if that works it may be possible to introduce the insect to these islands.

Until then it's gonna be patience and a hard slog controlling it.

Lady Haywire wrote: »

We've had a small patch of it behind a shed ever since I was a wee mite (not today or yesterday in other words :pac:) and it's not spread. Some of it actually ends up being eaten & tramped by the cows every year as the patch is in a small meadow so guess some ends up in a bale each year too. It's certainly around in bigger patches in other areas but ours hasn't spread so we just leave it alone. Guess that helps??

If the cows are eating it then they are probably spreading it to the other areas and anywhere those bales go it will also go...

Anyone who has JK anywhere on their property should be dealing with it.

Lady Haywire wrote: »

It hasn't spread in 25+yrs so no, it's not actually spreading. If it was, I would deal with it.

"It's certainly around in bigger patches in other areas but ours hasn't spread so we just leave it alone. "

Are you certain that your patch isnt the source of these "other areas" though?

Lady Haywire wrote: »

When I say other areas, I mean by the side of the road, where hedgecutting takes place, so it speads there. These would be about a mile or two away (at least) from our farm. So yes, it's not ours spreading it as we don't touch it at all with the hedgecutting. I keep an eye on it & if it was to spread, I'd act.

Kill it. Just do the right thing..... It will of course spread, the wind takes it, cows will spread.

Do as advised on here and watch it die.

See councils working on it in areas but it's taking years to sort and it then kills everything surrounding too.

Lady Haywire wrote: »

When I say other areas, I mean by the side of the road, where hedgecutting takes place, so it speads there. These would be about a mile or two away (at least) from our farm. So yes, it's not ours spreading it as we don't touch it at all with the hedgecutting. I keep an eye on it & if it was to spread, I'd act.

Hedge cutting with a flail type hedge cutter will spread it like wildfire. Or anything machine that would carry tiny particles of the root system.

It does not spread from seeds. or foliage. It can take years to start growing if soil carrying roots is disturbed. It may lie dormant for decades and suddenly burst into growth.

Is this Japanese Knotweed?

TomOnBoard wrote: »

Is it wrapping around other plants or growing on top of them?.

No, I don't see that it is.

dryan wrote: »

Started of with a small infestation 2 years ago in a beech hedge at the road entrance to the home place.
Was out trimming the hedge earlier in the week and i see thats its spreading at an alarming rate along the hedge on the site boundary.

Also starting to notice it in the farm boundary fences as well.

Is there any product out there that will kill it?

Japanese knotweed is not difficult to eliminate by dock spray. It cannot tolerate being trampled on and will not grow across fields. The root system is shallow and pulling it and then spraying it around this time as it tries to recover will seriously weaken it and then finish off any stragglers next year. Himalayan knotweed cannot be easily pulled, but also responds to dock spray.

Summer2020 wrote: »

https://ibb.co/MGqpbkn
https://ibb.co/XbPb9vL
https://ibb.co/X3fVHyf
https://ibb.co/x8sZrc8

Have I got Japanese knotweed ? Bought a house and just noticed this. There’s similar growing against the boundary fence of the neighbours (extremely long and overgrown back garden).
The previous owner has placed a plant support frame holding it up , can be seen in one of the photos. So I’m hoping it’s not knotweed, but fearful it is.

Don't know what it is, but it's not knotweed so you can relax.