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  Re: [Aroid-l] amorphophallus SICK Looking bulb HELP
From: "D. Scott Taylor" <staylor at brevardparks.com> on 2004.11.16 at 06:35:37(12384)
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
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