From the Physan website:

ORCHIDS - ADULT PLANTS*
Spray anytime disease other than rot (see below) is evident. Spray once
per month as preventative maintenance. Soak compost when fungus is
evident.
Use: 2 teaspoons PHYSAN 20 per gallon of water.



2 tsp/gallon (I think you saw the PHYSAN 20 and were a bit dyslexic)

Gene





In article FYSYj.2268$aJ1.1273@trndny03,
"Ray B" wrote:

Gene - that's per 20 gallons

--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies. Books, Artwork, and lots of Free Info!


"Gene Schurg" wrote in message
...
Ray & Diana,

Yes, Ray you are the expert in our eyes when you know more or have more
access to the info I need. I will increase the dosage to 2 tsp/gal.
Thanks for the info.

Diana, does this start as a green getting lighter on the top of the
leaves to turning black. Some of the species (gigantea, violacea) the
area turned a bright yellow. New leaves seem to be emerging without any
problem.

I'll look up Clearys since I've never used it.

Thanks,
Gene