Help: RUST

Adam Fikso irisman at AMERITECH.NET
Sun Aug 29 01:59:35 CEST 2004

Thank you for your response, Pascal.  However, I must question  the logic in
your statement.--  rather than: "the only option, unfortunately"--perhaps,
"the only currently known option."  And, since some clones seem to be able
to survive and maybe even evolve under pressure from Uromyces
ari-triphyllii, and, since isolation is not always a reasonable alternative
(any more than quarantine for an illness where the mode of transmission is
unknown): {HIV virus is clear, plague is fairly clear}
Uromyces ari-triphyllii seems not to have a clear mode of transmission
although thrips  and airborne vectors are likely  ..

I can understand destruction of the infected population as a solution.  What
about the alternatives? Living with it ,since it sems to be with us and
working at this goal directs us away from  merely taking a totally
Taliban-like paranoid position.  I realize that this may not be suitable to
everyone's predilection, but ,. .it IS a reasonable alternative, more in
line with the evolution that drives all of us whether we like it or not.

I think that discussions on this subject could get  more data into the
stream of thinking  about all manner of things, including hybridization for
Uromyces-resistant strains.

As I recall, my early comments about hybridization were sort of
discouraged, and pooh-poohed , but ...

----- Original Message -----
From: <pbruggeman at TISCALI.NL>
Sent: Saturday, August 28, 2004 6:38 PM
Subject: Betr: Re: Help: RUST


As you say yourself, there are many types of rust so the treatment of all
the different forms can not be uniform like you suggest. This particular
type of rust seems restricted to Arisaema and does occur in wild populations
of triphyllum so the influence of cultivation can be neglected. As Ray
mentioned, Arisaema rust spreads easily and the only option is to destroy
the infected plants. Destroying an entire collection seems somewhat over
the top  because not all species are equally vulnerable (section Pedatisecta
seems most vulnerable) but of the many pests and diseases that can affect
Arisaema, viruses and Arisaema rust are the ones that can not be treated.
Destroying infected plants when the first signs of one of these 2 show is
the only option unfortunately.


>-- Oorspronkelijk bericht --
>Date:         Sat, 28 Aug 2004 10:21:26 -0500
>Reply-To:     "Arisaema Enthusiast Group (AEG) Discussion List (and other
>hardy              Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
>From:         Adam Fikso <irisman at AMERITECH.NET>
>Subject: Re: Help: RUST
>Hello all.  Since there are approximately 100,000 species of plant rusts
>around the world, i f one's garden is infected, I think it might be
>premature to destroy one's collection.  It's like killing the baby to cure
>its cold.
>All diseases (in general) are dependent on an interaction of factors,
>presence  of the disease organism, resistance of the host, conditions in
>external environment favoring appearance of the disease.
>Rusts, for the most part are hindered by dry weather, enhanced by moist
>conditions and lack of circulating air.
>The Gusman's note in their book, unfortunately is insufficient to learn
>about control.  I had a lot of what appeared to be rust come in on
>bulbs this spring, and it appeared to be internal to the corms  rather
>on the outside.  I have seen it on plants in my yard and I regard it as
>sign that the plant is lacking in some kind of nutrient, or necessity.
>advice is, treat it with a broad well-rounded liquid fertilizer with a
>range of micronutirients.  Don't use manure or composted material from
>unknown source, wait until next year to see what transpires.  Consider
>aspirin drench for each plant of approximately 2 tabs per gallon of water.
>I use this on all plants which are in any way endangered ansd have saved
>many.  Refefences are available on the internet using keywords such as
>aspirin, acetylsalicylic acid, SAR (syemic acquired resistance.).  Good
>ck and let us know how you do. Regards, Adam in Glenview, IL USDA Zone
>----- Original Message -----
>From: "George R. Stilwell, Jr." <GRSJr at WORLDNET.ATT.NET>
>Sent: Saturday, August 28, 2004 7:08 AM
>Subject: Re: Help: RUST
>> Claus,
>> Sorry. The rust problem hasn't changed over the years as far as I know.
>> You could E-mail some of the members that posted on the subject to
>> see if they have additional information.
>> I believe Aroid-L also has a thread in their archives devoted to the
>> The word "rust" does not appear in the title of any of the published
>> in our Bibliography. But in the section on "Pests and Diseases" in 'The
>> Genus Arisaema', the Gusmans do discuss it briefly.
>> Their advice: destroy the plants by burning them.
>> Ray
>> At 11:26 AM 8/28/2004 +0200, you wrote:
>> >Ray,
>> >I was astonished that the most recent message on this topic is more
>> >years old when I checked the achive before writing initial message.
>> >thought that somebody might have some more up to date
>> >experience/information.
>> >Claus


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