Brown spot with dark edge on dendrobium leaf

[tjselwyn]

I've just noticed a smallish brown spot with a dark edge that's appeared on the leaf of my dendrobium (Comet King); it's one of the larger leaves on a newly growing cane.

This is the only spot, and otherwise all the leaves on this cane and a second new one look happy and healthy. Might it be fungus? I watered it yesterday, so it's possible it got left with a stray splash of cold water.

I've been keeping this orchid on a west-facing window (UK), behind a good sheer blind; I haven't yet had any indication that it's suffering from sunburn (it's been there for a couple of months), but could that be a possibility?

I haven't been able to find any photos or descriptions of spots that look quite like this. Any advice would be greatly appreciated!

[estación seca]

Welcome to the Orchid Board!

Something probably injured the leaf; perhaps a bug took a bite. Then fungus or bacteria may have entered the perforation.

I would take a scissors and cut off the leaf tip about a centimeter below the brown spot. I would expect no further problems.

[tjselwyn]

I'll do that - thanks for your help!