Damage on Phalaenopsis leafs - what could it be and how to cure it?

[Eyebabe]

Originally Posted by LuizaG

Hi Eyebabe

It has been about a weak and a half since I started talking here about this problem and since then the plant should have already been dead so it does not spread as fast as 2 - 3 days.

There is no Phyton 27 here in uk garden centres or other stores, you can only get treatment for fungus and that's it. I'll cut off the leaf and cover the cut part with cinnamon. If it dyes.. it dyes...

I should have said it "can" kill your plant in 2-3 days.
But the soup-ie looking irregular lesion with the yellowing of the leaf is fairly typical for pseudomonas.
If your conditions are fairly cool for phals (about 70F) and humidity low for phals (less than 50%) pseudomonas would move much more slowly.
You did the correct thing in cutting that leaf off and your plant actually looks pretty nice sans spike imo

[RosieC]

I wouldn't cut the old leaves off that plant.

Even if they look old and withered they are still doing something for the plant. Once they are not they will turn brown or even bright orange. I always leave them until they come away on their own with a gentle tug. Then I know the plant has completely finished with them and is willing to give them up. I never cut leaves unless they are sick (as with your previous one).