Bacterial/fungal/other issue?

[galgoa]

Could you please help me to identify the issue with phal speciosa leaf?
Is this viral, fungal, bacterial or result of spider mite attack?
Thanks in advance!

[Judi]

[Paul Mc]

Not sure. Are the spots mushy? Have you tried taking a damp white paper towel and wiping the underside of the leaves to see if you get red or brown dirt like specks on it?

[galgoa]

The spots are not mushy.
Yes, I tried the white paper test, I found just a minimal quantity of red dirt. So it was not heavily infected.

[Brooke]

Check this link to see if this is what you have.

https://images.search.yahoo.com/yhs/...&hsimp=yhs-001

You can then poke around the internet for more information.

Brooke

[euplusia]

My guess is Brevipalpus mite infection. Nearly invisible to the unaided eye.

[galgoa]

Thanks for your answers!