Phal and oncidium leaf spots identification

[Roberta]

As you have noted, sharing water is a really, really bad idea. That would have provided the route for the infection to get from the bad one into all the good ones. (Like sharing a toothbrush with random strangers... )

[shadowteme]

Originally Posted by Roberta

As you have noted, sharing water is a really, really bad idea. That would have provided the route for the infection to get from the bad one into all the good ones. (Like sharing a toothbrush with random strangers... )

Well it was more like sharing a toothbrush with a lover both orchids have been in my care for over a year, repotted in the same mix and thriving. It was all very random and quite sudden. Obviously I don't share water between new orchids and my established collection, but I can't keep a separate water container for 16 orchids.

---------- Post added at 08:26 PM ---------- Previous post was at 08:20 PM ----------

Originally Posted by estación seca

This looks like bacterial brown spot, though that is more common at high temperatures. Have a look at the St Augustine Orchid Society page on diseases.

Thanks! Unfortunately this looks very similar... I will def keep a close eye and start cutting if it gets any worse.