Japanese Knotweed
Discussion
Simpo Two said:
Doesn't a translocated herbicide like gyphosate or glufosinate ammonium shift it after a few applications?
It's how a neighbour and I killed off a patch before we knew that it was an offence to move parts of it.
Large application of glyphosate, wait for most to die, dispose of dead material to tip, repeat several times...
James here:
I'am developer and we deal with it alot...
There are three general ways of dealing with it;-
1)Weedkiller (individual stem injection or spraying) Has to show clear of regrowth for two seasons to get an EA certificate. Cheap(except injection) and does take time generally 3-4years
2)Dig and incinerate the root nodules by seiving by hand. OUr prefered route can be done very quickly and will get immediate EA certificate and normally guarenteed by contractor. NOT as cheap as weedkiller.
3)Dig and dump, rules used to be 8m around routes and 5m down. EA recommended but simply not possible due to govt land fill tax. I believe there is only now 4 tips in uk can that take the contaminated waste. For example one site dig and dump was £600k quote had it sorted and burn for £25k.
There is loads of the stuff everywhere, and most people don't even know what it looks like. Used in railway embankments and river banks to strengthen the ground by the Victorians..looks pretty too!
I'am developer and we deal with it alot...
There are three general ways of dealing with it;-
1)Weedkiller (individual stem injection or spraying) Has to show clear of regrowth for two seasons to get an EA certificate. Cheap(except injection) and does take time generally 3-4years
2)Dig and incinerate the root nodules by seiving by hand. OUr prefered route can be done very quickly and will get immediate EA certificate and normally guarenteed by contractor. NOT as cheap as weedkiller.
3)Dig and dump, rules used to be 8m around routes and 5m down. EA recommended but simply not possible due to govt land fill tax. I believe there is only now 4 tips in uk can that take the contaminated waste. For example one site dig and dump was £600k quote had it sorted and burn for £25k.
There is loads of the stuff everywhere, and most people don't even know what it looks like. Used in railway embankments and river banks to strengthen the ground by the Victorians..looks pretty too!
Perhaps we need reverse psychology. Pretend that you LIKE Japanese knotweed. You want a lush lawn that is 100% Japanese knotweed with no pesky weeds such as grass. Grow Japanese knotweed for food - open a vegetarian restuarant with a menu based on 20 Japanese knotweed recipes. Draw up a business plan assuming a 400% year-on-year growth of Japanese knotweed.
When all your future hopes depend on it, it will then mysteriously wither and die
When all your future hopes depend on it, it will then mysteriously wither and die
I found this stuff in my garden last year.
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Looked into getting rid of it and it is a total nightmare. Digging it out is too expensive so looked into getting it sprayed. It was going to cost hundreds and would take several years of treatment. I was going to buy the chemicals myself but it was still going to be hundreds. I thought I'd try all the things in my shed after we had successfully managed to kill the Ivy the year before.
I found that root killer made into a solution and sprayed on the leaves worked very well. The plants are still standing but look totally dead and are (as yet) showing no signs of re-growth.
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Looked into getting rid of it and it is a total nightmare. Digging it out is too expensive so looked into getting it sprayed. It was going to cost hundreds and would take several years of treatment. I was going to buy the chemicals myself but it was still going to be hundreds. I thought I'd try all the things in my shed after we had successfully managed to kill the Ivy the year before.
I found that root killer made into a solution and sprayed on the leaves worked very well. The plants are still standing but look totally dead and are (as yet) showing no signs of re-growth.
by 'look dead' do you mean they're brittle and brown? thats last yrs growth amte, trust me they'll be back soon.
parts of my garden has a JKW problem, as does next door. the only cheap, practical solution is a large dose of glysophate over the course of a few years. covering root beds with thick plastic sheeting will suffice if covering the area with gravel, but the plant will still grow around it at the edges.
nasty stuff.
parts of my garden has a JKW problem, as does next door. the only cheap, practical solution is a large dose of glysophate over the course of a few years. covering root beds with thick plastic sheeting will suffice if covering the area with gravel, but the plant will still grow around it at the edges.
nasty stuff.
Simpo Two said:
sleep envy said:
completed a development recently that had JKW issue - 20m X 8m X 2m mound
only cost £600k to deal with...
only cost £600k to deal with...
Seems like there's a business opportunity here!
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