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  Hot Water Treatment for Nematodes in Amorphs
From: George Yao <gcyao at mydestiny.net> on 2007.03.26 at 22:22:08(15492)
Hello everyone,

My Amoph collection was hit by nematodes last year and I tried
Furadan with mixed success, so I am now going to try using hot water
treatment. In my research on the Internet, dipping tubers in 50
degrees Centigrade hot water for 15 minutes was effective for many
nematodes, but shorter times at higher temps could also be used if
the plant material can withstand higher temps. It will of course be
more convenient using the latter, however, will Amorph tubers be able
to survive higher temps? If so, till how high?

I will appreciate hearing from people who have tried using hot water treatment.

George Yao

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From: "StroWi at t-online.de" <StroWi at t-online.de> on 2007.03.28 at 08:47:00(15500)
Dear George,

a standard treatment to cure dormant Hippeastrum bulbs from mites
(Steonotarsonemus laticeps) and a fungus (Stagonospora curtisii) is 46
C for 2 hours; since Hippeastrum bulbs can be quite big in diameter it
might match Amorphophallus.

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From: ALLAN TETZLAFF <atetzlaff at rogers.com> on 2007.03.29 at 08:30:44(15512)
Any idea how you accomplish such a task with accuracy? I've no idea about equipment. Thanks, Allan"StroWi@t-online.de" wrote: Dear George,a standard treatment to cure dormant Hippeastrum bulbs from mites(Steonotarsonemus laticeps) and a fungus (Stagonospora curtisii) is 46 C for 2 hours; since Hippeastrum bulbs can be quite big in diameter itmight match Amorphophallus.Good luck,Bernhard.-----Original Message-----> Date: Tue, 27 Mar 2007 07:22:08 +0200> Subject: [Aroid-l] Hot Water Treatment for Nematodes in Amorphs> From: George Yao > To: Discussion of aroids > Hello everyone,> > My Amoph collection was hit by nematodes last year and I tried> Furadan with mixed
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From: Steve Marak <samarak at gizmoworks.com> on 2007.03.29 at 22:42:51(15523)
There are posts on this now and then over on the bulb lists, especially the
ones where amaryllid growers hang out. Apparently one group is even having some
success de-virusing amaryllids with heat treatment, although they found a
higher temperature was needed (55 C for one hour was one comment), and there is
a very narrow window between not killing the virus and also killing the bulb.

If I were going to try this, I'd buy one of those immersion heater water bath
setups I see in labs, and lately, in kitchens (Iron Chef, anyone?). It seems
they are great for poaching things because they regulate the temperature so
precisely.

Steve

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From: "StroWi at t-online.de" <StroWi at t-online.de> on 2007.03.30 at 07:03:57(15527)
Dear Allan,

nor have I....

But I would probably try a big aquarium heater ( 50 - 100 W) in a 10 -

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From: George Yao <gcyao at mydestiny.net> on 2007.03.30 at 07:26:45(15528)
Allan,
To avoid the need for accuracy is another reason why I wanted to find out
how high a temperature Amorph tubers can take. If they can take much
higher temps, then I won't have to worry about putting up a good setup.
Aside from that, one source says that at higher temps, shorter treatments
are enough for the same efficacy so much so that at 60 degrees
centigrade, only 3 minutes is needed, which will be so much more
convenient.
Bernhard,
Thanks for the info. That's a wake up call that I should consider
size.
George
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