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CICLY · Lethal Yellowing Disease of Coconut Palm

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Fwd: C I C L Y News from Jamaica   Message List  
Reply | Forward | Delete Message #2121 of 2180 |
Re: C I C L Y News from Jamaica

Dagmar

Your ProMed-Mail seems very comprehensive and I hope
other CICLY members will find it at
http://tinyurl.com/2djc7d

I agree that it would be a good idea to run a
follow-up item on breakdown of resistance to coconut
lethal yellowing but not by me - I am no longer doing
active research and I am not a plant pathologist.
Perhaps you could persuade Maria Mercedes Roca, or one
of the people she mentions in her email - Michel
Dollet or Nigel Harrison - to do so.

Best of luck

Hugh
====

--- Dagmar Hanold <dagmar.hanold@adelaide.edu.au>
wrote:

> Thanks for this, Hugh!
>
> I am the 'plant moderator' for www.promedmail.org,
> an information
> service by the International Society for Infectious
> Diseases. Since I
> didn't get any replies to my questions, I decided
> not to wait any
> longer and have just posted the Jamaica item on LY -
> it should be on
> the web today or tomorrow. Perhaps you could check
> it out and let me
> know what you think.
>
> I would be very happy to run a follow-up story
> including some of your
> remarks below - I think breakdown of resistance is a
> very important and
> scientifically interesting question. If you prefer I
> could make
> something up out of what you have written below, but
> it would be really
> fantastic if you would like to prepare a small item
> to be posted
> directly.
>
> Please let me know if you think this is a good idea.
>
> Thanks again for your help! Looking forward to
> hearing from you again,
>
> Dagmar
>
>
> On 22/05/2007, at 8:17 AM, Hugh Harries wrote:
>
> > Dagmar
> >
> > It seems I was wrong to think that CICLY members
> might
> > have an opinion on your question "does this . . .
> mean
> > that dwarf and hybrid resistance has broken
> down?"
> >
> > It is their interest in lethal yellowing disease
> that
> > appears to have broken down. But just wait until
> > another Latin American and/or West African
> country
> > becomes host to the next epidemic outbreak!
> >
> > My own opinion is that because there have always
> been
> > examples of individual dwarf and hybrids dying
> from LY
> > they all vary in their level of resistance. None
> are
> > immune and when infection does occur none live
> long
> > enough to be called tolerant.
> >
> > Resistance and susceptibility are like the two
> faces
> > on a spinning coin - which way it lands depends
> on
> > external circumstances.
> >
> > So what happens when more than a few - perhaps
> most
> > dwarf and hybrid varieties in Jamaica die from LY
> > while some countries - Cuba and Dominican
> Republic -
> > can co-exist with this disease and another
> country -
> > Ivory Coast - remain free even when it is on
> their
> > border with Ghana for years?
> >
> > It must be the external circumstances.
> >
> > What has changed in Jamaica since the successful
> 60s
> > and 70s? Has the phytoplasma mutated? Has the
> vector
> > become more effective? Has another vector joined
> the
> > attack?
> >
> > I don't suppose CICLY members have opinions on
> these
> > possibilities either.
> >
> > But just wait until another Latin American and/or
> West
> > African country becomes host to the next epidemic
> > outbreak!
> >
> > Regards
> >
> > Hugh
> > ====
> >
> > --- Dagmar Hanold <dagmar.hanold@adelaide.edu.au>
> > wrote:
> >
> > > Hello all,
> > > I would appreciate any comments or information
> on
> > > the issue below.
> > > Thanks and regards,
> > > Dagmar Hanold
> > >
> > > Begin forwarded message:
> > >
> > > > From: Hugh Harries <harrieshc@yahoo.com>
> > > > Date: 10 May 2007 3:17:45 PM
> > > > To: Dagmar Hanold
> <dagmar.hanold@adelaide.edu.au>
> > > > Subject: Re: C I C L Y News from Jamaica
> > > >
> > > > Hi Dagmar
> > > >
> > > > It is still a matter of opinion. Why don't
> you
> > > send
> > > > your question to cicly@yahoogroups.com to
> generate
> > > an
> > > > exchange of opinions?
> > > >
> > > > Hugh
> > > >
> > > > --- Dagmar Hanold
> <dagmar.hanold@adelaide.edu.au>
> > > > wrote:
> > > >
> > > >> Dear Hugh,
> > > >>
> > > >> I may have missed previous stories on this -
> but
> > > >> does this paragraph
> > > >> below
> > > >>
> > > >>>> It says the continued failure is linked to
> > > >> farmers' reluctance to
> > > >>>> plant the Malayan Dwarf and Maypan hybrid,
> > > which
> > > >> are still dying from
> > > >>>> lethal yellowing disease.
> > > >>
> > > >> mean that dwarf and hybrid resistance has
> broken
> > > >> down?
> > > >>
> > > >> Kind regards,
> > > >> Dagmar Hanold
> > > >>
> > > >>
> > > >>
> > > >>> From: "hugh.harries" <harrieshc@yahoo.com>
> > > >>> Date: 6 May 2007 4:48:28 PM
> > > >>> To: CICLY@yahoogroups.com
> > > >>> Subject: C I C L Y News from Jamaica
> > > >>> Reply-To: CICLY@yahoogroups.com
> > > >>>
> > > >>> "Sat May 5, 2007
> > > >>> Farmers' reluctance stymies efforts to
> re-grow
> > > >> coconuts
> > > >>>
> > > >>> The Coconut Industry Board, which is
> staging
> > > the
> > > >> annual general
> > > >>> meeting of the Growers Association on
> Saturday,
> > > >> has indicated that it
> > > >>> is experiencing problems with its planting
> > > >> programmes.
> > > >>>
> > > >>> It says the programmes introduced as part
> of
> > > >> efforts to maintain the
> > > >>> number of trees which existed immediately
> > > before
> > > >> the latest outbreak
> > > >>> of yellow leafing in 1997 have seen little
> > > >> success.
> > > >>>
> > > >>> According to the Board, it did not achieve
> its
> > > >> targeted planting of
> > > >>> 100,000 seedlings per year, and this has
> been
> > > the
> > > >> experience every
> > > >>> year since the establishment of the
> programmes.
> > > >>>
> > > >>> It says the continued failure is linked to
>
=== message truncated ===



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Thu May 24, 2007 8:15 am

Hugh Harries <harrieshc@yahoo.com>
hugh.harries
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Message #2121 of 2180 |
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Hello all, I would appreciate any comments or information on the issue below. Thanks and regards, Dagmar Hanold ... Dr Dagmar Hanold Plant Virology School of...
Dagmar Hanold
dagmar.hanold@adelaid...
Send Email
May 10, 2007
1:41 pm

Dagmar It seems I was wrong to think that CICLY members might have an opinion on your question "does this . . . mean that dwarf and hybrid resistance has...
Hugh Harries
hugh.harries
Offline Send Email
May 21, 2007
11:50 pm

Thanks for this, Hugh! I am the 'plant moderator' for www.promedmail.org, an information service by the International Society for Infectious Diseases. Since I ...
Dagmar Hanold
dagmar.hanold@adelaid...
Send Email
May 23, 2007
7:18 am

Dagmar Your ProMed-Mail seems very comprehensive and I hope other CICLY members will find it at http://tinyurl.com/2djc7d I agree that it would be a good idea...
Hugh Harries
hugh.harries
Offline Send Email
May 24, 2007
8:35 am

Dagmar, Hugh, Cicly members who are doing research on some difficult problems like the lethal yellowings of coconut cannot spend their time in front of their ...
DOLLET Michel
michel.dollet@cirad.fr
Send Email
Jul 24, 2007
4:31 pm

Hello Michel, Thank you very much for this information, it is most interesting. Do you think it would be ok if I did a follow-up story posting your abstract...
Dagmar Hanold
dagmar.hanold@adelaid...
Send Email
Jul 25, 2007
8:52 am

... Cicly members who are doing research on some difficult problems like the lethal yellowing of coconut cannot spend their time in front of their computer... ...
Hugh Harries
hugh.harries
Offline Send Email
Jul 26, 2007
12:55 pm

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