Japanese Knotweed

[codlasher]

There was a patch of JKW that some thoughtful gardener had dumped beside the land-owners hedge-line. This had spread through the hedge into the field. It took five years to get under control with two doses of glyphosate annually. There's still a watching brief.

The important thing was not to kill the hedge hence the cautious approach.

 

I'd be very cautious dealing with this particularly as the potential customer wants to sell the property.

 

I would consider the 'dig and remove' option as being the best, but I'm sure any mortgage company would want a twenty five year disclaimer so the insurance liability implications would be an interesting one....

To your benefit If you could pull this off in a business-like fashion you are half way to becoming a specialist in this area with the experience too!

Seen from the 'specialist' angle you could set your rates to match those who operate from Harley Street or those who deal with Bat surveys. £600 per visit/consultation....

codlasher

[Eddy_t]

There was a patch of JKW that some thoughtful gardener had dumped beside the land-owners hedge-line. This had spread through the hedge into the field. It took five years to get under control with two doses of glyphosate annually. There's still a watching brief.

The important thing was not to kill the hedge hence the cautious approach.

 

I'd be very cautious dealing with this particularly as the potential customer wants to sell the property.

 

I would consider the 'dig and remove' option as being the best, but I'm sure any mortgage company would want a twenty five year disclaimer so the insurance liability implications would be an interesting one....

To your benefit If you could pull this off in a business-like fashion you are half way to becoming a specialist in this area with the experience too!

Seen from the 'specialist' angle you could set your rates to match those who operate from Harley Street or those who deal with Bat surveys. £600 per visit/consultation....

codlasher

 

Bat surveyor licences are a LOT harder to obtain though, and cost a lot more, whereas stem injection costs very little, requiring PA1/6 to apply, and the equipment is a damn lot cheaper too

 

 

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[Gary Prentice]

There was a patch of JKW that some thoughtful gardener had dumped beside the land-owners hedge-line. This had spread through the hedge into the field. It took five years to get under control with two doses of glyphosate annually. There's still a watching brief.

The important thing was not to kill the hedge hence the cautious approach.

 

I'd be very cautious dealing with this particularly as the potential customer wants to sell the property.

 

I would consider the 'dig and remove' option as being the best, but I'm sure any mortgage company would want a twenty five year disclaimer so the insurance liability implications would be an interesting one....

To your benefit If you could pull this off in a business-like fashion you are half way to becoming a specialist in this area with the experience too!

Seen from the 'specialist' angle you could set your rates to match those who operate from Harley Street or those who deal with Bat surveys. £600 per visit/consultation....

codlasher

 

What do you do with it once dug and removed?

[AlexB]

Bury it in a very very deep hole, I think it's 5 or 7 meters below ground....

[Gary Prentice]

Bury it in a very very deep hole, I think it's 5 or 7 meters below ground....

 

Thinking about this further. JKW has evolved to adapt to its native surroundings, ie. extreme temperatures, volcanic rock etc. If tree roots can't grow through high bulk density soils, how does this species do it? If the pore space is too small, cell division in the apical meristem of the root physically can't occur. This thing is said to grow through concrete:confused1:

 

I can't fathom the biological process that occurs, I can understand why it has, given its native habitat, but how is this the only plant (that I know of) that's evolved to do this.

[openspaceman]

Bury it in a very very deep hole, I think it's 5 or 7 meters below ground....

 

Yes I think it has to be wrapped in plastic and buried back on the site it came from. Otherwise it's to go to a licensed site and they charge separately for the estimated plant content and a lesser amount for the soil, as this does not have the landfill tax because it's inert.

 

There are cases where the soil has been sterilised in situ with steam and also by being excavated and heat treated but I've never found out the results. It was a field I tried to get involved in but didn't get antwhere with the big waste companies.

[treequip]

Is that 100% on the mortgage rob?

 

No its not, it depends if the lender knows its there, if they don't ask just don't tell them.

[adbat234]

Japanese knotweed invasion is halting house sales as buyers are denied mortgages on blighted properties | Mail Online

 

Hows that for a nightmare!

[Gary Prentice]

It's not that hard to get rid of though. The specialist companies use something called Tordon, or something like that. Its a single dose which wipes out everything, so can't be used around other vegetation.

 

I got told this by a company who were pricing to clear an area around a Metrolink station in Manchester a few yrs back. Glyphosate works, but requires repeated use over a few years (4-5), which is what they also use if there's surrounding vegetation.

[adbat234]

It's not that hard to get rid of though. The specialist companies use something called Tordon, or something like that. Its a single dose which wipes out everything, so can't be used around other vegetation.

 

I got told this by a company who were pricing to clear an area around a Metrolink station in Manchester a few yrs back. Glyphosate works, but requires repeated use over a few years (4-5), which is what they also use if there's surrounding vegetation.

 

 

Its VERY hard to get rid of, and very expensive to have it done by a large company. I wouldn't be happy with it being within 100 metres of my property, spreads like wildfire especially if people just cut it down.