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Do I need Physan 20?

This is a discussion on Do I need Physan 20? within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; Yes it is used by some people as a preventive fungicide and the instructions that ...

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  1. #21
    orchidsal's Avatar
    orchidsal is offline Senior Member
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    Yes it is used by some people as a preventive fungicide and the instructions that come along with the bottle even suggest once a month preventive applications. It may not cure every disease or fungus that strike your orchids, but it can be a big help with some pathogens and it is excellant in stopping the transmission of these organism's from one plant to the next. AL

  2. #22
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    Dorsetman is offline Senior Member
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    Quote Originally Posted by moniluhum View Post
    Can you use Physan 20 as a preventive say for example if your not sure the plant has the fungus? Also, if you have applied it on a affected plant. How long afterward do you have to quarantine the plant?
    Yes. In fact it was Alan Moon, then the Curator ( head grower) at the great Ericy Yoing Orchid Foundation who told me that they sprayed all of their orchids, once a month, with a Physan spray, as a prophylactic measure, and that he thought their foliage was cleaner as a result. Goodness knows how much they used, at that time their growing collection was housed in five greenhouses which I think measured each 120 feet long x 30 feet : i have not been since they rebuilt....don't know the present staff, although I belive that anyone who can show they are a member of a genuine orchid society is welcomed and can see behind the display house, which is something else.
    Of course it is Selgiene I use now just because Physan is not on sale in UK or the EU for what I call bureaucratic nonsensical reasons.

    ---------- Post Merged at 11:52 PM ----------

    And quarantine ? Thats another question. As long as the plant could infect others I guess !

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