Smoken Oncidium.. Literally!
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  #1  
Old 12-15-2009, 03:25 PM
SP2340 SP2340 is offline
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Hello. I recently received an Oncidum from a friend of my family that is in bad shape. I unpotted it and removed all media. The roots actually didn't look so bad but the plant itself has some brown areas around the PBs. I sprayed it down with Physan and let it sit for about a minute then rinsed it off. I then sprayed hydrogen peroxide on the areas that where brown. When I came back about a minute later there was what appeared to be smoke coming off the plant! Obviously some type of chemical reation but can someone enlighten me on what happened? Thank you.
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  #2  
Old 12-15-2009, 07:20 PM
orchidsamore orchidsamore is offline
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Physan is an ammonium salt and it probably reacted with the h202 and released oxygen causing a mist.

It is never good to mix chemicals. Many can form harmful gases.
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  #3  
Old 12-16-2009, 06:56 PM
Magnus A Magnus A is offline
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Due to the MSDS (material safety data sheet) Physan is incompatibility with strong oxidizers! And hydrogen peroxide is a strong oxidant...
What exactly you saw as smoke is hard to say, I will not speculate. What you did was to destroy everything of the physan that remained on the plant and made the physan treatment more or less useless!
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