Fungicides/pesticides and "is there help for this tuber?"

[Dr. Kelly A. Schofield]

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AEG,
I could probably find the answers to my questions by exploring the =archives where there is a lot of great info, but I will go ahead and ask =anyway in hopes that my Arisaema ignorance is not too obvious.
I live in the humid south (Chapel Hill NC, Zone 7a) and deal with a lot =of heat and humidity problems.  I have recently acquired a speciosum, =which I proceeded to place in the ground instead of potting it up like =my other Himalayans.  Well, it proceeded to dwindle and looked =particularly poorly.  Yesterday I decided to dig it to see the problem =and lo and behold, I had rotted 2/3 of the tuber away with not good =enough drainage.  My questions are as follows:
What pesticides are safe and how to use them on Arisaema =(and other aroids for that matter)?
What pesticides are safe and how to use them...?
Can this tuber be saved?
There are multiple buds that appear viable on the ="unrotted" side, can these be sliced off, with as much viable tuber as =possible and doused with fungicide (which one?, see above), and I would =end up with some small plants?  Or should I say "goodbye" to this tuber =and move on?

Thanks in advance for your help.
Kelly A. =Schofield
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