jap knot weed

[openspaceman]

Someone said don't use too strong a mix as a weaker mix gets taken further into the roots. !

 

My spraying guru says that too strong a mix traumatises the plant tissue and then it cannot translocate to the rhizomes.

 

We frequently had instructions to spray JKW from network rail but they didn't often allow for follow up treatment so the initial effort was a bit wasted, I used to advise the home owners affected to keep on at NR.

[wadhill1]

You could use ICADE if you can get it and the last time I looked it was off label for Jap Knotweed ... But it does do a good job. The only down side is the cost! approx £70 per litre.

[gooseflight]

ICADE

Looks promising. Tagged for JKW at pitchcare.com, where it also states:

 

"Can be used on all established amenity grassland with the exception of airfields"

 

Why would airfields be an exception?

[wadhill1]

Because airfields are often mowed for haymaking or silage.

 

Amenity grass is either left as clippings or taken away to a tip/ composting area.

 

In other words its to stop the likelyhood of animals ingesting it.

[gooseflight]

Ah, of course. Thanks.

[WesD]

Broadshot also works a treat as did Tordon until it's license ran out.

 

 

Sent from my iPhone using Arbtalk

[Arborist]

At the moment we're using roundup pro active.

[WelshMan]

My parents have about half a mile of riverbank covered in it . Over the last 35 years I've slowly eradicated it from most of their land by doing a small amount of treatment annually.

 

In the summer I stem inject the shoots using diluted high strength glyphosate. I'm not sure of the mix proportion as my dad does that. I use a fairly cheap stem injection kit bought from ebay for about £70 that injects a measured dose. The injector needle does have a habit of getting blocked so I use a bradawl to make the first puncture.

 

In January/February, when the roots are weakened, I carefully dig up the surface rhizomes and burn with the old shoots and leaves. In April I dig up any new growth. Repeat as necessary in the summer.

[richy_B]

I do a lot of stem injection and the recommendation is neat normally. Highly effective though. I've hit 1000 stems in an area and not seen it return in the following 5 years. Its a sh*t job though, crawling around in a JK jungle for days at a time.