Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

Hi

If anyone's interested I've just been told to look out for Simon Ford on BBC
Breakfast news tomorrow morning. He'll be live from Newark Park between 0700
and 0900 discussing Japanese Knotweed and a new DEFRA consultation about
introducing an insect to eat it.

That's all the info I have but I thought it might be of interest to someone.

Tim
--
http://www.flickr.com/photos/lusername/
http://www.timdenning.myby.co.uk/

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

Tim wrote:
Hi

If anyone's interested I've just been told to look out for Simon Ford on
BBC Breakfast news tomorrow morning. He'll be live from Newark Park
between 0700 and 0900 discussing Japanese Knotweed and a new DEFRA
consultation about introducing an insect to eat it.

That's all the info I have but I thought it might be of interest to
someone.
Tim

May cause an even greater problem - look at the introduction of the Cane
Toad in Queensland. Then again, in the same country, the Mexican Cochineal
insect wiped out the Opuntia which had gone crazy over there, and then died
out as its host plant had gone.

--
Jeff

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Jeff Layman
writes
Tim wrote:
Hi

If anyone's interested I've just been told to look out for Simon Ford on
BBC Breakfast news tomorrow morning. He'll be live from Newark Park
between 0700 and 0900 discussing Japanese Knotweed and a new DEFRA
consultation about introducing an insect to eat it.

That's all the info I have but I thought it might be of interest to
someone.
Tim

May cause an even greater problem - look at the introduction of the Cane
Toad in Queensland. Then again, in the same country, the Mexican Cochineal
insect wiped out the Opuntia which had gone crazy over there, and then died
out as its host plant had gone.

There's already been press about this. Supposedly they've been careful
about testing that the insect doesn't switch to any native plants. See,
for example

http://news.scotsman.com/uk/Predator...bug.5027366.jp
--
Stewart Robert Hinsley

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

Tim wrote:
Hi

If anyone's interested I've just been told to look out for Simon Ford
on BBC Breakfast news tomorrow morning. He'll be live from Newark
Park between 0700 and 0900 discussing Japanese Knotweed and a new
DEFRA consultation about introducing an insect to eat it.

That's all the info I have but I thought it might be of interest to
someone.
Tim
Meddling.......again :(
--
Pete C
London UK

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

Stewart Robert Hinsley wrote:
In message , Jeff Layman
writes
Tim wrote:
Hi

If anyone's interested I've just been told to look out for Simon Ford on
BBC Breakfast news tomorrow morning. He'll be live from Newark Park
between 0700 and 0900 discussing Japanese Knotweed and a new DEFRA
consultation about introducing an insect to eat it.

That's all the info I have but I thought it might be of interest to
someone.
Tim

May cause an even greater problem - look at the introduction of the Cane
Toad in Queensland. Then again, in the same country, the Mexican
Cochineal insect wiped out the Opuntia which had gone crazy over there,
and then died out as its host plant had gone.

There's already been press about this. Supposedly they've been careful
about testing that the insect doesn't switch to any native plants. See,
for example

http://news.scotsman.com/uk/Predator...bug.5027366.jp

More info he
http://www.cabi.org/japaneseknotweed...te=139&page=50

I find this statement in tha FAQs interesting:

"Will releasing a natural control agent eradicate Japanese knotweed in the
UK?
No. Eradication is not the normal outcome of natural control since it is not
in the agent's best interest to eradicate its only food source. Long-term
control, below an economic or environmental threshold, should be
anticipated."

Seems that they are suggesting the psyllid bug has some degree of choice in
the matter! The cochineal insect eradicated opuntia. We can only hope that
the psyllid bug will be able to do the same.

--
Jeff

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Jeff Layman
writes
Stewart Robert Hinsley wrote:
In message , Jeff Layman
writes
Tim wrote:
Hi

If anyone's interested I've just been told to look out for Simon Ford on
BBC Breakfast news tomorrow morning. He'll be live from Newark Park
between 0700 and 0900 discussing Japanese Knotweed and a new DEFRA
consultation about introducing an insect to eat it.

That's all the info I have but I thought it might be of interest to
someone.
Tim

May cause an even greater problem - look at the introduction of the Cane
Toad in Queensland. Then again, in the same country, the Mexican
Cochineal insect wiped out the Opuntia which had gone crazy over there,
and then died out as its host plant had gone.

There's already been press about this. Supposedly they've been careful
about testing that the insect doesn't switch to any native plants. See,
for example

http://news.scotsman.com/uk/Predator...bug.5027366.jp

More info he
http://www.cabi.org/japaneseknotweed...te=139&page=50

I find this statement in tha FAQs interesting:

"Will releasing a natural control agent eradicate Japanese knotweed in the
UK?
No. Eradication is not the normal outcome of natural control since it is not
in the agent's best interest to eradicate its only food source. Long-term
control, below an economic or environmental threshold, should be
anticipated."

Seems that they are suggesting the psyllid bug has some degree of choice in
the matter! The cochineal insect eradicated opuntia. We can only hope that
the psyllid bug will be able to do the same.

There's another reason for not expecting eradication. When Japanese
Knotweed becomes scarce the bugs will find it difficult to locate the
last few remaining plants, and therefore become scarce themselves,
giving the knotweed a respite. What they are aiming for is a stable
equilibrium at a low frequency - complete eradication would be a bonus
--
Stewart Robert Hinsley

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Stewart Robert Hinsley
writes

There's another reason for not expecting eradication. When Japanese
Knotweed becomes scarce the bugs will find it difficult to locate the
last few remaining plants, and therefore become scarce themselves,
giving the knotweed a respite. What they are aiming for is a stable
equilibrium at a low frequency - complete eradication would be a bonus

I have the impression that it would be a miracle. :)
I will record the programme on DVD to give to the head warden of the
park where I work in a group of a dozen or so volunteers.
It is all we can do to keep certain areas free from Balsam weed, with
repeat visits to remove any small roots remaining.

Do these bugs kill the roots of Knotweed, which seem to creep
underground and pop up close by? At least that is my perception,
BICBW. The warden has to apply for a licence each year to treat
the Knotweed, but it reappears each year in an area between a pool and
the river, and surrounded by Balsam, which has to be removed first or
the Knotweed is hidden. It is a losing battle...
--
Gordon H
Remove "invalid" to reply

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Martin
writes
On Thu, 23 Jul 2009 12:03:36 +0100, Stewart Robert Hinsley
wrote:

There's another reason for not expecting eradication. When Japanese
Knotweed becomes scarce the bugs will find it difficult to locate the
last few remaining plants, and therefore become scarce themselves,
giving the knotweed a respite. What they are aiming for is a stable
equilibrium at a low frequency - complete eradication would be a bonus

What if the bugs adapt to eat other plants?

Teach 'em to like Himalayan Balsam, hopefully. ;-)
--
Gordon H
Remove "invalid" to reply

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Gordon H
writes

I will record the programme on DVD

Or rather I would have done had I read the OP yesterday!
--
Gordon H
Remove "invalid" to reply

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Gordon H
writes
In message , Stewart Robert Hinsley
writes

There's another reason for not expecting eradication. When Japanese
Knotweed becomes scarce the bugs will find it difficult to locate the
last few remaining plants, and therefore become scarce themselves,
giving the knotweed a respite. What they are aiming for is a stable
equilibrium at a low frequency - complete eradication would be a bonus

I have the impression that it would be a miracle. :)
I will record the programme on DVD to give to the head warden of the
park where I work in a group of a dozen or so volunteers.
It is all we can do to keep certain areas free from Balsam weed, with
repeat visits to remove any small roots remaining.

Do these bugs kill the roots of Knotweed, which seem to creep
underground and pop up close by? At least that is my perception,
BICBW. The warden has to apply for a licence each year to treat
the Knotweed, but it reappears each year in an area between a pool and
the river, and surrounded by Balsam, which has to be removed first or
the Knotweed is hidden. It is a losing battle...

If I understand correctly they eat the stems. If the bugs are
sufficiently effective, this will result in the weakening of the root
system. Over a few years this will lead to the eradication of the clump.
(It's like frequent mowing will control Japanese knotweed.)
--
Stewart Robert Hinsley

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Stewart Robert Hinsley
writes
In message , Gordon H
writes

Do these bugs kill the roots of Knotweed, which seem to creep
underground and pop up close by? At least that is my
perception, BICBW. The warden has to apply for a licence each
year to treat the Knotweed, but it reappears each year in an area
between a pool and the river, and surrounded by Balsam, which has to
be removed first or the Knotweed is hidden. It is a losing battle...

If I understand correctly they eat the stems. If the bugs are
sufficiently effective, this will result in the weakening of the root
system. Over a few years this will lead to the eradication of the
clump. (It's like frequent mowing will control Japanese knotweed.)

Thanks. Mowing isn't an option in the particular area, I don't think.
Some of us would like to try scythes on the balsam below the bottom
"knuckle", to at least chop them down and give other growth a chance,
but I think Health & Safety aspects would rule that out. ;-)
--
Gordon H
Remove "invalid" to reply

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

"Stewart Robert Hinsley" wrote in message
...
In message , Gordon H
writes
In message , Stewart Robert Hinsley
writes

snip

Do these bugs kill the roots of Knotweed, which seem to creep underground
and pop up close by? At least that is my perception, BICBW.
The warden has to apply for a licence each year to treat the Knotweed, but
it reappears each year in an area between a pool and the river, and
surrounded by Balsam, which has to be removed first or the Knotweed is
hidden. It is a losing battle...

If I understand correctly they eat the stems.

They do not eat the stems and foliage, like slugs, nor the roots, like
chafers, but rather suck the sap, like aphids. This leads to the weakening
you describe.

If the bugs are
sufficiently effective, this will result in the weakening of the root
system. Over a few years this will lead to the eradication of the clump.
(It's like frequent mowing will control Japanese knotweed.)

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

In message , Gordon H
writes
In message , Stewart Robert Hinsley
writes
In message , Gordon H
writes

Do these bugs kill the roots of Knotweed, which seem to creep
underground and pop up close by? At least that is my
perception, BICBW. The warden has to apply for a licence each
year to treat the Knotweed, but it reappears each year in an area
between a pool and the river, and surrounded by Balsam, which has to
be removed first or the Knotweed is hidden. It is a losing battle...

If I understand correctly they eat the stems. If the bugs are
sufficiently effective, this will result in the weakening of the root
system. Over a few years this will lead to the eradication of the
clump. (It's like frequent mowing will control Japanese knotweed.)

Thanks. Mowing isn't an option in the particular area, I don't think.
Some of us would like to try scythes on the balsam below the bottom
"knuckle", to at least chop them down and give other growth a chance,
but I think Health & Safety aspects would rule that out. ;-)
Why should elf n safety stop you using a recognised garden implement.
Just wear appropriate PPE. Ah maybe you can't get a certificate in
scything cos nobody is qualified to teach it cos they haven't been
trained by a certified scything trainer and no-one thought to claim
grandfather rights:-)
--
hugh
It may be more complicated but is it better?

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

On Jul 24, 9:25*pm, Martin wrote:
On Fri, 24 Jul 2009 21:00:45 +0100, hugh ] wrote:
In message , Gordon H
writes
In message , Stewart Robert Hinsley
writes
In message , Gordon H
writes

Do these bugs kill the roots of Knotweed, which seem to creep
underground and pop up close by? * * * *At least that is my
perception, BICBW. * * * The warden has to apply for a licence each
year to treat the Knotweed, but it reappears each year in an area
between a pool and the river, and surrounded by Balsam, which has to
be removed first or the Knotweed is hidden. * * *It is a losing battle...

If I understand correctly they eat the stems. If the bugs are
sufficiently effective, this will result in the weakening of the root
system. Over a few years this will lead to the eradication of the
clump. (It's like frequent mowing will control Japanese knotweed.)

Thanks. * *Mowing isn't an option in the particular area, I don't think.
Some of us would like to try scythes on the balsam below the bottom
"knuckle", to at least chop them down and give other growth a chance,
but I think Health & Safety aspects would rule that out. * * *;-)
Why should elf n safety stop you using a recognised garden implement.
Just wear appropriate PPE. Ah maybe you can't get a certificate in
scything *cos nobody is qualified to teach it cos they haven't been
trained by a certified scything trainer and no-one thought to claim
grandfather rights:-)

Using a scythe without training can result in having a leg over.
--

Martin

? Leg cut off you mean?

Judith

Japanese Knotweed - piece on BBC Breakfast news 23rd July 2009
 

On Jul 24, 10:19*pm, Martin wrote:
On Fri, 24 Jul 2009 14:17:43 -0700 (PDT), Judith in France



wrote:
On Jul 24, 9:25*pm, Martin wrote:
On Fri, 24 Jul 2009 21:00:45 +0100, hugh ] wrote:
In message , Gordon H
writes
In message , Stewart Robert Hinsley
writes
In message , Gordon H
writes

Do these bugs kill the roots of Knotweed, which seem to creep
underground and pop up close by? * * * *At least that is my
perception, BICBW. * * * The warden has to apply for a licence each
year to treat the Knotweed, but it reappears each year in an area
between a pool and the river, and surrounded by Balsam, which has to
be removed first or the Knotweed is hidden. * * *It is a losing battle...

If I understand correctly they eat the stems. If the bugs are
sufficiently effective, this will result in the weakening of the root
system. Over a few years this will lead to the eradication of the
clump. (It's like frequent mowing will control Japanese knotweed.)

Thanks. * *Mowing isn't an option in the particular area, I don't think.
Some of us would like to try scythes on the balsam below the bottom
"knuckle", to at least chop them down and give other growth a chance,
but I think Health & Safety aspects would rule that out. * * *;-)
Why should elf n safety stop you using a recognised garden implement.
Just wear appropriate PPE. Ah maybe you can't get a certificate in
scything *cos nobody is qualified to teach it cos they haven't been
trained by a certified scything trainer and no-one thought to claim
grandfather rights:-)

Using a scythe without training can result in having a leg over.
--

Martin

? *Leg cut off you mean?

Depends what he is looking for nudge nudge
--

Martin

I'm telling Sacha on you!

Judith