Japanese Knotweed

natB

Hello, wondering does anyone have advice..there is about an acre of Japanese Knotweed growing in the piece of land behind our house, there is a wooden fence separating it from our garden, i'm afraid that it will spread onto our property and over take the garden as it grows so quickly. i was just wondering would there be a legal obligation for the owners to get rid of it.. Also should it be reported. We only noticed it this summer as it is our first summer in this house, Thanks

Wyldwood

This is from Cork County Council website, I'm sure other councils have similar advice

http://www.corkcoco.ie/co/pdf/786446050.pdf

vicwatson

If you can get your hands on it...The Sunday Times magazine had an article on this very subject last Sunday named "The Plant That Ate Britain"

If you want pm me your address and I'll post it to you

baaba maal

If the owner isn't forthcoming in getting it sorted I wouldn't hang around waiting. Buy, borrow or rent a knapsack sprayer, load it up with the correct dilution of glyphosate and get going (using suitable protection). I'm not being alarmist- just if you get one spray done this year and then blast it again in late spring next year you will get a good head start on it. If there are any other motivated neighbours get them on board. You should proactively tackle this patch now as otherwise it will most definitely spread if left unchecked.

natB

vicwatson wrote: »

If you can get your hands on it...The Sunday Times magazine had an article on this very subject last Sunday named "The Plant That Ate Britain"

If you want pm me your address and I'll post it to you

Thanks Vicwatson,, the Sunday Times is where I read about it.. It got me worried, didnt know it was such a vicious weed.

monkeynuz

Just spraying won't do, you need to inject the stems too if you want me to elaborate I can but am typing on phone now and can't be bothered lol.

monkeynuz

And yes I have successfully eradicated jkw before

natB

monkeynuz wrote: »

Just spraying won't do, you need to inject the stems too if you want me to elaborate I can but am typing on phone now and can't be bothered lol.

Thanks Monkeynuz, no need to elaborate- wow injecting an acre full of stems could take a long time, i'd imagine it would cost a lot to remove it properly.. it has been ignored and left to get completely out of control. It will be up to the owners to get rid of it but at the moment i suppose its threatening everybodies property surrounding it.. (its in the middle of an estate). Should it be dealt with soon?

monkeynuz

Companies in the uk that specialise in the treatment and removal charge up to £100 per square metre......

LurkerNo1

Is it actually spreading towards your house ? How close is it ? Can you take a picture.

monkeynuz

It should be dealt with immediately although getting late ish in the year (wouldn't want to leave it any later)

I believe enforcement notices can be issued but not sure of the listing of knotweed as a pernicious weed.

If it is left it will continue to spread underground iirc the seed is sterile.

vinnie13

Mix round up/gallup 360 with forefront it should knock it back

vinnie13

Mix round up/gallup 360 with forefront it should knock it back

monkeynuz

vinnie13 wrote: »

Mix round up/gallup 360 with forefront it should knock it back

Will only brown the tops though, it won't kill the roots, as someone that has had success treating jkw on a professional basis stem injection is the only way to go.

ithread

Hi all

We have a problem with JKW in our back garden and it is a nightmare of a weed! monkeynuz, do you know of anyone in the ROI who deal with this - the UK seem to have companies and there is on up north.

Any advice is appreciated!!!!

Thanks in advance.

monkeynuz

ithread wrote: »

Hi all

We have a problem with JKW in our back garden and it is a nightmare of a weed! monkeynuz, do you know of anyone in the ROI who deal with this - the UK seem to have companies and there is on up north.

Any advice is appreciated!!!!

Thanks in advance.

Sorry ithread, no I don't, I do any treatments I am asked to myself, to be honest it isn't rocket science, depending on the size of the patch you have too it might be more effective for you to do it yourself, yes there are a fair few firms in the uk doing it as it can be big business costing upwards of £100 per square metre.

If you wanted you could get a few large Barrel syringes from your local vets and get some roundup and stem inject them yourself just remember to use a cocktail stick to make a small hole for the syringe first then after doing the stems just under spray the leaves.

monkeynuz

Whereabouts are you?

ithread

Thanks Monkeynuz, that is a good tip about the cocktail sticks!

Day Lewin

I have successfully eradicated small patches of JKW just by spraying with Round-up but the stuff regenerates...

It took three sprays at approx monthly intervals over one summer, followed by one further attack the following spring on one wicked little bit that refused to die.

You have to think of it as a campaign, it will take repeated assaults but you can win, with diligence.

I still visually check the patches where it used to be, just so as not to let my guard down. But its gone!

raler

According to the ST article, scientists in the UK have identified one of around 180 species of bacteria that 'to the point of starvation' will only eat JKW, and has no other predators (won't get into food chain that way and upset the Eco system in these parts). I think it still has to be tested out..

Proper eradication won't happen until this is introduced.. and that article also said that the more you try to beat it, the more bedded down the thing gets..

raler

raler wrote: »

According to the ST article, scientists in the UK have identified one of around 180 species of bacteria that 'to the point of starvation' will only eat JKW, and has no other predators (won't get into food chain that way and upset the Eco system in these parts). I think it still has to be tested out..

Proper eradication won't happen until this is introduced.. and that article also said that the more you try to beat it, the more bedded down the thing gets..

Where is this article? I would like to read it.

raler

Someone has helpfully uploaded it to the interweb:

http://www.environetuk.com/sites/default/files/Sunday%20Times%20July%202014.pdf

ithread

Hello all

I understand this thread is old but I am just wondering if anyone knows if there is a similar business to this uk one (www.environetuk.com) in Rep of Ireland?

We have a problem with JK in our back garden and wold be great to get the professionals in!

Thanks in advance!

magicbastarder

if it's bad, get a couple of goats!

monkeynuz

ithread wrote: »

Hello all

I understand this thread is old but I am just wondering if anyone knows if there is a similar business to this uk one (www.environetuk.com) in Rep of Ireland?

We have a problem with JK in our back garden and wold be great to get the professionals in!

Thanks in advance!

Can't help you with a professional company but the cost will probably be around €150 per square metre for a full and certified job.