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  disease
From: hcward416 at comcast.net> on 2003.08.26 at 13:46:56(10532)
Can anyone please help me identify the problem I am having with this
elephant ear? It is spreading to every plant. Thank you.
Barbara

From: Steve Marak samarak at arachne.uark.edu> on 2003.08.26 at 14:08:34(10533)
Aroiders, and Barbara,

You'll all have trouble identifying the problem because the accompanying
photo - which I noticed just as I approved the post - was stripped out by
the Aroid-L list processor. For many reasons - viruses being just one - we
only send out text mail on Aroid-L.

Barbara, if you have a web site where you can post the picture, or if you
want to e-mail the picture to Les Kallus to put up on the Aroid ID Center,
I'm sure someone can identify the problem.

Steve

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From: "Hawaii Tropical Botanical Garden" htbg at ilhawaii.net> on 2003.08.26 at 14:14:04(10534)
Barbara,

You don't say what symptoms you are experiencing, nor where you are growing
these plants. However, I recently had a very bad, fast-spreading fungus
attack on my large patch of Colocasia 'Nancy's Revenge.' I cut them all
back to the corms and sprayed with the fungicide Daconil. That seems to
have solved the problem.

Scott A. Lucas

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From: hcward416 at comcast.net> on 2003.08.26 at 14:29:16(10535)
Let's try this again. Can anyone please help me identify the problem I am
having with this elephant ear? It is spreading to every plant. Photo can be
seen at:
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From: "Cooper, Susan L." SLBryant at scj.com> on 2003.08.27 at 04:56:51(10536)
Sorry I can't help with the disease problem, but I wanted to say you have a
beautiful yard!
Susan

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From: Scott Hyndman hyndman at aroid.org> on 2003.08.27 at 06:08:28(10537)
Barbara,

Without the benefit of a proper pathology test and report,
my educated guess from your image is that your Colocasia
may be showing symptoms of some type of bacterial
infection. Again, it is difficult to determine this from
an image only, but small necrotic spots surrounded by a
yellow halo pathology may be indicative of bacterial leaf
pathogens. You might take a sample to your local extension
service and ask them to send it to your state lab for
analysis to determine exactly the pathogen.

Have you sprayed with any pesticides or other chemicals
recently? The other possibility is a phyto toxic response
to a chemical application. The symptomology of certain
types of phytotoxicity can be similar to bacterial leaf
pathogenesis.

Please keep us posted about the problem. I agree with
Susan Cooper: Your garden is beautiful!

Regards, Scott

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