Strange leaf

[Pupka]

Here is another phal from my collection that has a strange leaf, I don't know what's this, is it a virus? Could it possibly be a sunburn? It's been near a window for a while... I kept my eye on it for about a week, it does not spread around, but that damaged part gets only worse, may be I should cut it?

[smartie2000]

not very virus like...
I would think it is sunburn

[Shadow]

Doesn't look like a virus, but I would cut it because that leaf is almost useless now - the damaged area is too big.

[Pupka]

I wouldn't cut because each leaf nourishes the plant and moreover, this leaf is not the last lower one. Even if half of it is dead, I think the other pretty good half is healthy... And it does not spread around, otherwise I'd cut it right away

[smartie2000]

the leaf is half alive

[Mahon]

I'd advise cutting it as well. Problems like these can either kill a single plant or kill your entire collection. If this damage is in fact sunburn, it can lead to problems such as bacterial and fungal infestation. If this plant wasn't placed in full sun (to vouch for sunburn), then this plant needs to definitely be separated from your collection, and treated. But the leaf should go...

-Pat

[Ross]

Doesn't really look like like sunburn that I've ever seen, but then.... I agree with those suggesting cutting the leaf. It really won't hurt the plant and might just help.

[Pupka]

Ok, guys, I cut the leaf. This leaf has grown in my house, when I bought this plant, it didn't have it. So it was twice as hard to do it, morally. It has a new one started and a spike, so I hope, it's happy now. Thank you for your advise.

[Matthews]

It looks like wilting due to sunburn. I would take the above peoples advice and cut it.