Good questions Gary,

The browning area is firm (kind of leathery).

The spot will spread rapidly, you can see a change everyday.

No, I have not tried any treatment yet. I will probably try a fungicide
real soon, but I have been hesitant, because (being indoors) the humidity
level is not high (about 50%) and I really have not experienced any other
types of fungus problems (even the coconut husk is not moldy).

It seems to hit the leaves at random. Sometimes it gets the lower leaves,
but not always.

I have had a few seedlings die from this, mostly because they are so small.

I agree with you, I am beginning to believe that it is an infection
(probably a fungus, because of the lack of "mushiness").

Thanks,
Frank


"V_coerulea" wrote in message
...
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