Re: [Aroid-l] amorphophallus SICK Looking bulb HELP

I have posted previously a couple of times about similar problems I have had with paeoniifolius, and based on those communications I have surmised that it can be a 'problem' species. Now I am wondering/hoping that some clones are maybe less subject to this disorder. I have had ongoing problems with 'rot' in this species, particularly with larger tubers. I have tried cutting away the rot area and treating with fungicides (I have tried Captan and Mancozeb). I have also tried sulfur and treating lesions with bleach: sometimes this works and sometimes not: often the rot will continue until much of the tuber is consumed. Oddly enough, when I get rot on konjac, the simple cutting away of the lesion seems to solve the problem, so these two species seem different in this regard. The recommendation I have had is that damaged tubers not be replanted, and also do not reuse planting media. A well-drained media is also supposed to be very important. I have tried drenching the soil with Mancozeb throughout the growing season, and this really didn't seem to help; my suspicion at this point is the the problem may not be fungal in origin: in fact, I have sent two different samples to path labs with no definitive results. This remains somewhat of a (frustrating!) mystery!!!
D. Scott Taylor
On Nov 15, 2004, at 9:11 AM, Greg Dorst wrote:

If it is injured or sick it finds its way to my house.

Paeoniifolius Bulb, received from my friend, appears to have an injury from possible digging instrument used for its removal. It has been out of the soil for about 4 weeks. The gash is about 7" long and 4" wide. Ya it is a nice size one for sure. I have used a spoon yesterday 11-14-04 and removed the "Mush" and "decay", and some seemingly discolored tissue up to the point of clean healthy flesh. I would like to save this bulb if possible. There is a few spots remaining which appear as slight discoloration ( dark spots ) but still, "semi firm" that would require deeper and more radical tissue insult to remove. I would say that I extracted a good 15% of the bulbs mass. Is there anything else which I should do other than say a prayer? Is the extraction of the decay the proper means to save the bulb? Is there a wonder application to end future decay? The soil the plant was in, is it considered contaminated? My suggestion to that was, " dump it and avoid the risk of any possible contamination ".
Thank you
Gregg and Maggie Dorst
gregg1-@charter.net
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D. Scott Taylor, Ph.D.
Central Region Land Manager
Brevard County Environmentally Endangered Lands Program
5560 N. US 1
Melbourne, Florida 32940
V: 321.255.4466 FAX 321.255.4499
email: staylor@brevardparks.com
www.eelbrevard.com

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