Eduardo, just a thought: when I re-read your description of this fungus,
it sounds a bit like mealybug. I have to constantly be on guard against
these insects, as they love the Amorph. tubers, particularly the emerging
leaf or bloom. I hope I am not offending, but have you looked closely,
even with a handlens, at that cottony substance?
Doug Ewing, Greenhouse Manager (206) 543-0436
Department of Botany
University of Washington
Seattle, WA 98195-5325
On Wed, 14 Jul 1999, Eduardo Goncalves wrote:
> Dear aroiders,
> I need EXTRA-urgent help! As some of you already know, I am living in Sao
> Paulo now, but my living collection is in Brasilia (more than 1000km far).I
> use to check my dormant tubers once a month (seldom twice) to see if they
> are up. They are usually kept in boxes in my closet, in my house in
> Brasilia. For more than 4 years they are kept there and everything was
> alright. This year I got some tubers in Brazilian Southern Amazonia
> (Taccarum weddellianum, Dracontium ulei, some rare tuberous Xanthosoma, etc)
> and placed them in the same place. Suddently, a white fungus started to grow
> everywhere in my tubers. They are eating ALL my dormant plants, including
> those very rare like Taccarum warmingii, Xanthosoma aff. eggersii, X.
> platylobum, Asterostigma cryptostylum, A. lividum, Scaphispatha gracilis,
> many morphospecies of Spathicarpa and many others. The fungus grows like a
> white cotton, mainly in the top of the tubers. I am very affraid, because I
> dont want to lose them. I have never used fungicides like captan before,
> because Brasilia is very dry during the dormancy season and it never
> happened before. Please, is there any way to solve this and SAVE my plants?
> All suggestions are welcome! It is new to me and I really don't know
> anything about it.
> Best wishes,
> (a hopeless man from Brazil...)
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