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hugh.harries · hugh.harries@gmail.com | Group Owner  - Edit Membership Start a Group | My Groups
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 #2120 of 2180 |
Re: C I C L Y News from Jamaica

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
> > >> farmers' reluctance to
> > >>> plant the Malayan Dwarf and Maypan hybrid,
> > which
> > >> are still dying from
> > >>> lethal yellowing disease.
> > >>>
> > >>> Planting under the old programme should have
> > >> ended in 2004, but the
> > >>> Board decided that the period should be
> > extended.
> > >>>
> > >>> This, as the targeted 300,000 seedlings over
> > the
> > >> five years had not
> > >>> been achieved.
> > >>>
> > >>> Under the programme, the Board is continuing to
> > >> offer 60,000 seedlings
> > >>> per year and fertilizer for 80 per cent of the
> > >> seedlings."
> > >>>
> > >>>
> > >>
> > >
> >
> http://www.rjr94fm.com/news/story.php?category=2&story=35569
> > >>>
> >
> > Dr Dagmar Hanold
> > Plant Virology
> > School of Agriculture, Food and Wine
> > The University of Adelaide, Waite Campus
> > Glen Osmond SA 5064, AUSTRALIA.
> > Tel: +61 8 8303 7307; Fax: +61 8 8303 7109.
> > E-mail: dagmar.hanold@adelaide.edu.au
> > website:
> >
> http://www.agwine.adelaide.edu.au/research/plant/path/pv
> > CRICOS Provider Number 00123M
> > _________________________________________________
>
> __________________________________________________________
> Yahoo! Mail is the world's favourite email. Don't settle for less,
> sign up for
> your free account today
> http://uk.rd.yahoo.com/evt=44106/*http://uk.docs.yahoo.com/mail/
> winter07.html
>
Dr Dagmar Hanold
Plant Moderator, ProMED-mail



Tue May 22, 2007 11:25 pm

Dagmar Hanold <dagmar.hanold@adelaide.edu.au>
dagmar.hanold@adelaide.edu.au
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Message #2120 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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