"Wendy" wrote in message
.. .
On Sun, 15 Aug 2004 17:09:37 GMT, V_coerulea wrote:

You don't mention if the browning area is firm or soft. How rapid does
the
spot spread? Have you tried any treatments, physiological or chemical
besides cutting off the spot? You say it's on various leaves. Are they
usually the bottom ones? Do the same plants get spots again in the same
areas (lower, medium or new leaves)? Have any of your plants died from
this?
It certainly does not appear to be "natural" meaning normal. And I doubt
it's nutritional or more leavs would be affected on each plant. It
certainly
looks like it could be fungal or bacterial. I also resembles sunburn if
a
drop or two of water or fertilizer was on the leaf and got some sun
coming
in the window. But I'd go with the former especially if the brown is
soft
and waterlogged. Try cutting off the affected area and soaking the cut
end
in Physan for 10-15 min and then treating with sulfur or cinnamon. I had
a
St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure
would have died. In desperation, I knocked the plant out of the pot,
shook
off all the medium, and soaked the whole plant in Physan for 20 min. I
still
have that plant today and it's big and beautiful.
Good Luck
Gary

"Frank Rittwager" wrote in message
...

Can anyone take a guess at what this leaf problem is? I have numerous
Paphs
of several kinds (species, primaries, and novelties), and they all seem
to
get this type of spot on various leaves on a regular basis. When I cut
off
the end of the leaf, the problem seems to stop spreading for a couple
of
months, and then the leaf starts to die (becomes dark brown) again
(starting
at the end of the leaf). Is this just natural?

http://216.160.131.65/LeafSpot1.jpg
http://216.160.131.65/LeafSpot2.jpg

Environmental Details:
Grown In: Medium Sized Coconut Husk
Plant Food: "Grow More" Urea Free 20-10-20
Watering Schedule: Every 4-5 days
Temperatu ~75 degrees F.
Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed)

Please let me know if I can supply any more details or additional
photos...



Thanks for any information or opinions!!!!
Frank




Thanks for the info Gary, I just noticed the same problem
with my St. Swithin.(still in bloom) A rapid browning, a whole leaf in a
day!!!
Have it unpotted & soaking in Physan as we speak.
Cheers Wendy

Wow! A whole leaf in a day! I'd definaately guess brown rot which can become
systemic. I don't know how long it takes or what conditions are necessary
for the systemic mode of infection. But once it happens, supposedly the
plant is a goner. I don't know if a Physan soak can cure that or not. Old
Physan instructions say it can which is why I tried it originally but I
can't swear that my St Swithin was infected systemically by erwinia spp
since I didn't have anything tested. I do know it worked and I still have
the plant in a healthy condition. Good luck with yours.
Gary