Adam
Interestingly I attended a meeting with Scottish Government
representatives a few years ago on invasive aliens - the general
impression they gave was that JKW was such a widespread and endemic
problem that it was beyond an adequate control regime.
In my experience local authority promoted treatments tend to be erratic
and incomplete, but there is a growing awareness among land managers of
the problem. At present I am involved in a complex process of annually
reminding our estate manager to spray a stand of JKW on a site adjacent
to a landfill restoration completed 3 years ago - very frustrating
(invasion of the weed could undermine the cap)
Anthony
-----Original Message-----
From: Contaminated Land Management Discussion List
[mailto:[log in to unmask]] On Behalf Of Adam
Czarnecki
Sent: 24 July 2008 14:07
To: [log in to unmask]
Subject: Re: Japanese Knotweed.
Ok lets have a poll...how many local authorities actively manage or
eradicate invasive plants such as Japanese Knotweed, on their own land.
--
Adam Czarnecki
Divisional Director
Clancy Consulting Ltd.
Dunham Court
2, Dunham Road
Altrincham
Cheshire
WA14 4NX
Tel: 0161 613 6000
Fax: 0161 613 6099
Clancy Consulting Ltd.
Registered Office: 2 Dunham Road, Altrincham, Cheshire, WA14 4NX
Registered in England No: 3693529
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-----Original Message-----
From: Contaminated Land Management Discussion List
[mailto:[log in to unmask]] On Behalf Of Colin
Crompton
Sent: 24 July 2008 13:45
To: [log in to unmask]
Subject: Re: Japanese Knotweed.
Clare
If the Japanese Knotweed has been sprayed once or twice in the past and
there is no re-growth then it is more than likely that the Japanese
Knotweed will begin to re-grow next year.
The Developer / Sub-contractor carrying out the work should have put in
place a "Management Plan" to deal with the Japanese Knotweed. Most
Local Authorities issue a planning condition relating to Japanese
Knotweed Management Plans being agreed prior to commencement, therefore
it might be worth checking if such a condition exists, and then checking
if the developer / sub contractor has or is fulfilling his obligation.
From a practical point of view, the area should receive a 3 to 4 year
spraying and monitoring plan in accordance with the Environment Agency
guidance and regulations, particularly the WQM1 application for spraying
near water. Even if there is no further re-growth this year it does not
mean the problem has gone away.
We have a subsidiary company that specialises in Japanese Knotweed
advice and treatment, if you need more information give them a call on
0161 763 7200 (Conor Leyden)
Regards
Colin Crompton
Leyden Kirby Associates Ltd
-----Original Message-----
From: Contaminated Land Management Discussion List
[mailto:[log in to unmask]] On Behalf Of Clare
Horton
Sent: 24 July 2008 12:22
To: [log in to unmask]
Subject: Japanese Knotweed.
Hello everyone,
a Consultant has said, 'treatment of JKW strands has already been
undertaken, but the potential for re-growth remains. If any strands are
identified within Planning boundaries on-site during the earthworks,
then the Contractor shall undertake further treatment'.
My problem is that the JKW is extremely prominent in areas at river's
edge and adjacent to the housing development site. Although initial
treatment may appear to have removed 'strands' of JKW, if an on-going
programme of eradication is not undertaken throughout development and
after, then the adjacent/ close by JKW 'strands' will (re)-invade the
site and could cause damage to property or services.
Should I be asking for long-term monitoring and treatment as part of
development, or is the Developer only obliged to show apparent
eradication at the point of development and sale?
Many thanks,
Clare
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