Japanese Knotweed

[likeitorlumpit]

Can you not just use stem injection with roundup

[JimM]

A friend of mine is looking at eradicating this stuff along with hogweed and balsam along the banks of the lower Findhorn up here. Looks like a nightmare in logistics.

[RobRainford]

along banks of rivers you want to stem inject as it contains the chemical. Stem injection is highly labour intensive but is effective if you get all the stems.

[sandy2210]

have had fairly good results on a patch this year coverd the ground in winter with black membrane and put 300mm crushed rock on top to make a carpparking area so far only 3 shoots emerged at the edges which were sprayed with roundup when they first appeared so far no more come up

[Rich W]

My firm do a 5 year program on knotweed.

[AlexB]

http://www.environment-agency.gov.uk/homeandleisure/wildlife/130079.aspx

 

It's a sod, plus you need a licence.

[APC]

Fallopia japonica ain't no match for APC. I killed it, I killed it up gooooooood.

[Eddy_t]

Used to do a garden with it, glyphosate it, couple of weeks later remove and burn the dead stuff and glyphosate the regrowth, if you do it soon, you should get a few treatments in before it goes dormant, and it'll weaken it enough to kill it outright

 

 

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[csservices]

I've got a customer with a small patch of it approx 3 m x 2m started out in the hedge (he's still convinced his neighbour bought it in on his hedgecutter) was up there topping on monday, its took about 2 years and cost him around £2k to eradicate it, it has also ended up losing 3-4 metres of mature hawthorn hedge due to the herbicide used to kill it

[adamthearborist]

It takes a few goes of herbicide and removing new growth, but after a couple of years it will be clear. An NPTC licence is easy to get and then you're able to carry out the work..

 

If it's really bad, or affecting a large area then removal of the soil is sometimes needed.

 

Though it's not a notifiable weed, it is worth keeping an accurate record or what you're doing to get rid of it just in case the council or environment agency ask.