Hot Water Treatment for Nematodes in Amorphs

From: George Yao <gcyao at mydestiny.net> on 2007.03.27 at 05:22:08(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 +More Metro-Manila Philippines -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.18/734 - Release Date: 3/26/2007 2:31 PM _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

From: "StroWi at t-online.de" <StroWi at t-online.de> on 2007.03.28 at 15:47:00(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. +More 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 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 > Metro-Manila > Philippines > > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 268.18.18/734 - Release Date: > 3/26/2007 2:31 PM > > _______________________________________________ > Aroid-l mailing list > Aroid-l@gizmoworks.com > http://www.gizmoworks.com/mailman/listinfo/aroid-l > > _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

From: ALLAN TETZLAFF <atetzlaff at rogers.com> on 2007.03.29 at 15:30:44(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 +More 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> Metro-Manila> Philippines> > > --> No virus found in this outgoing message.> Checked by AVG Free Edition.> Version: 7.5.446 / Virus Database: 268.18.18/734 - Release Date:> 3/26/2007 2:31 PM > > _______________________________________________> Aroid-l mailing list> Aroid-l@gizmoworks.com> http://www.gizmoworks.com/mailman/listinfo/aroid-l> > _______________________________________________Aroid-l mailing listAroid-l@gizmoworks.comhttp://www.gizmoworks.com/mailman/listinfo/aroid-l_______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

From: Steve Marak <samarak at gizmoworks.com> on 2007.03.30 at 05:42:51(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 +More On Thu, 29 Mar 2007, ALLAN TETZLAFF wrote: > 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 it might match > Amorphophallus. > > Good luck, > Bernhard. -- Steve Marak -- samarak@gizmoworks.com _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

From: "StroWi at t-online.de" <StroWi at t-online.de> on 2007.03.30 at 14:03:57(15527) Dear Allan, nor have I.... But I would probably try a big aquarium heater ( 50 - 100 W) in a 10 - +More 20 liter bucket and make sure the the water is aggitated somehow and make sure that the bulbs/tubers do not touch the heater. I will inquire how they do it in a commercial nursery. Best, Bernhard. -----Original Message----- > Date: Thu, 29 Mar 2007 17:30:44 +0200 > Subject: Re: [Aroid-l] Hot Water Treatment for Nematodes in Amorphs > From: ALLAN TETZLAFF > To: Discussion of aroids > 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 > it > might match Amorphophallus. > > Good luck, > Bernhard. _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

From: George Yao <gcyao at mydestiny.net> on 2007.03.30 at 14:26:45(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 +More Metro-Manila Philippines At 3/29/2007 11:30 PM, you wrote: 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 it might 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 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 > Metro-Manila > Philippines > > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 268.18.18/734 - Release Date: > 3/26/2007 2:31 PM > > _______________________________________________ > Aroid-l mailing list > Aroid-l@gizmoworks.com > http://www.gizmoworks.com/mailman/listinfo/aroid-l > > _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.20/737 - Release Date: 3/28/2007 4:23 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.22/739 - Release Date: 3/29/2007 1:36 PM _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

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