Betr: Re: Help: RUST

[pbruggeman at TISCALI.NL]

Adam,

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 populati=ons
of triphyllum so the influence of cultivation can be neglected. As Ray al=ready
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 Pedatise=cta
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.

Pascal

>-- Oorspronkelijk bericht --
>Date:         Sat, 28 Aug 2004 10:21:26 -0500
>Reply-To:     "Arisaema Enthusiast Group (AEG) Discussion List (and othe=r
>hardy              Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
>From:         Adam Fikso <irisman at AMERITECH.NET>
>Subject: Re: Help: RUST
>To:           ARISAEMA-L at NIC.SURFNET.NL
>
>
>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 cu=re
>its cold.
>
>All diseases (in general) are dependent on an interaction of factors,
>presence  of the disease organism, resistance of the host, conditions in=
>the
>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 gladi=olus
>bulbs this spring, and it appeared to be internal to the corms  rather
than
>on the outside.  I have seen it on plants in my yard and I regard it as
a
>sign that the plant is lacking in some kind of nutrient, or necessity.
My
>advice is, treat it with a broad well-rounded liquid fertilizer with a
full
>range of micronutirients.  Don't use manure or composted material from
an
>unknown source, wait until next year to see what transpires.  Consider
an
>aspirin drench for each plant of approximately 2 tabs per gallon of wate=r.
>
>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
lu
>ck and let us know how you do. Regards, Adam in Glenview, IL USDA Zone
5a
>
>
>----- Original Message -----
>From: "George R. Stilwell, Jr." <GRSJr at WORLDNET.ATT.NET>
>To: <ARISAEMA-L at NIC.SURFNET.NL>
>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
>subject.
>>
>> The word "rust" does not appear in the title of any of the published
>material
>> in our Bibliography. But in the section on "Pests and Diseases" in 'Th=e
>> 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
than
>3
>> >years old when I checked the achive before writing initial message.
I
>> >thought that somebody might have some more up to date
>> >experience/information.
>> >Claus
>>


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