Tolumnia Leaf Turning Brown

[samfish]

I have a Tolumnia orchid, and one leaf has started turing brown from the tip, and the brown area is slowly moving towards the base of the plant.

Last nite, I cut off the brown area and put Physan on the leaf.

Today, the area below the cut has started turning brown.

Should I re-apply Physan?
Cut again?

I dont want it to get to the base of the plant, and kill the plant!

[estación seca]

It could be too wet, the roots rotted, and there is nothing to provide water to the plant.

It could be you're not watering it enough.

It could be the humidity is very low, and you're not watering it enough.

Can you provide more information?

Also see

American Orchid Society - Tolumnias

[samfish]

The plant is mounted on a stick, and I can see the roots are healthy, some with green tips.

I water it daily, and it dries within 1-2 hours.

Humidity is 60-80%.

The plant and other tolumnias next to it seem happy, Just this one leaf seems to have the problem.

I put Physan on it again last night, and the brown area seems to not be growing... I will keep an eye on it

[cjm3fl]

Originally Posted by estación seca

Can you provide more information?

Where is this leaf located on this plant?

Could it be it's just the oldest leaf who's time is up? Or..
Is it located near the top of the plant and it may have received some kind of damage?

[estación seca]

Your care sounds great. If the leaf is dry and brown, I wouldn't worry too much. If it is wet and brown I would look for causes.

I wouldn't treat with chemicals unless you're pretty sure there's a bacterial or fungal problem.

[silken]

A picture would be very helpful too.