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  Arisaema Rust
From: mossytrail at hctc.com (mossytrail) on 2008.05.01 at 18:09:15(17526)
Is there any known fungicide against the orange-dot rust
affecting Arisaema leaves?

From: soukupvg at email.uc.edu (Victor Soukup) on 2008.05.02 at 08:06:18(17531)
This is not a fungus! It is a rust, and this seems to be a bad year for it
as many of the May Apples here in the Cincinnati area are showing it.

Vic

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From: mossytrail at hctc.com (mossytrail) on 2008.05.04 at 17:37:31(17549)
> This is not a fungus! It is a rust, and this seems to be
> a bad year for it as many of the May Apples here in the
> Cincinnati area are showing it.
>
> Vic
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From: jonathan.ertelt at vanderbilt.edu (Jonathan Ertelt) on 2008.05.05 at 09:23:08(17554)
Jason, Vic, et al.

Actually rusts are a type of fungus, order Uredinales, which
are typically host-specific parasites. Sometimes there are two hosts
depending on the stage of the life cycle, perhaps the most well known
being cedar/apple rust. Definitely fungus though. As to the specifics
of the Arisaema rust, including any treatments, we'll have to go to
someone who's worked with this species or group.

Jonathan

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