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11-06-2016, 09:03 AM
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Senior Member
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Join Date: Jun 2015
Zone: 9b
Location: Phoenix AZ - Lower Sonoran Desert
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There have also been rescues of some bulbous plants (Hippeastrum, Amaryllidaceae) by heating the bulb in a water bath, to nearly the point of killing the bulb, for a certain length of time. Not all the bulbs survived. I don't recall the details. This does not work for all plants nor all viruses; I recall noticing infected cacti can be heated by the sun much hotter than the temperature that successfully treats Hippeastrum, and they are not cured.
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11-06-2016, 10:45 AM
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Super Moderator
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Join Date: Jun 2008
Zone: 10a
Location: Coastal southern California, USA
Posts: 13,340
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Just to jump in with an an example of a classic orchid that is virused and shows no signs of it... C. Porcia 'Cannizaro'. The entire grex is known to have virus - the original FCC from which it was mericloned was virused, and the techniques to avoid transmission weren't know ant that time (or for that matter that there was even an issue, no doubt, ) There are many, many of these plants in collections, and they are spectacular. The flowers show no signs of color break. The plants are very vigorous (which is why there are so many... they grow like crazy, and people HAVE to divest themselves of divisions or they would be overwhelmed) I'm not about to toss mine! It puts on a wonderful show every year. It does live in the "back 40", since i have the luxury of growing it outside. (Among its other traits, it tolerates winter temps down to 32 deg F/0 deg C or even a little lower) If I had to put in in a greenhouse I'd be sure that it didn't drip on anything and isolation would be much more difficult. It has the potential, of course, to infect other plants if hygiene when potting, etc. is not practiced meticulously. But it's a classic example that all virused orchids aren't weak and don't have any other telltale signs.
Last edited by Roberta; 11-06-2016 at 10:49 AM..
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11-06-2016, 11:40 AM
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Senior Member
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Join Date: Apr 2012
Zone: 2a
Location: Fairbanks, AK
Posts: 975
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Yes, thermotherapy has been used for several plants, but ORSV is very stable against heat. Here is a nice review of elimination of viruses. I think full PDF should be viewable:
http://revistas.inia.es/index.php/sj...icle/view/3201
Last edited by naoki; 11-06-2016 at 11:43 AM..
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11-06-2016, 11:46 AM
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Senior Member
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Join Date: Jun 2015
Zone: 9b
Location: Phoenix AZ - Lower Sonoran Desert
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Thank you. Yes, it is possible to download the paper. Of note, though the URL is to a Spanish-language journal, the paper is in English.
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11-07-2016, 11:06 AM
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Moderator
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Join Date: May 2005
Zone: 7b
Location: Queens, NY, & Madison County NC, US
Age: 44
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Great conversation and great info. Thank you all!
__________________
"We must not look at goblin men,
We must not buy their fruits:
Who knows upon what soil they fed
Their hungry thirsty roots?"
Goblin Market
by Christina Georgina Rossetti
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