Brown spots on Vandas leafs
 

Hello everyone,
I hope you are all fine.
I have this Vanda for about 3 years and during the last winter this brown spots appeared. Is this fungal infection? Is this bad?
Thank you very much.
Have a nice day

The diamond with bull's eye lesions are characteristic for Phyllosticta/Gugnardia fungus infection. Read about it at the St. Augustine Orchid Society Web page.

Thank you very much for your help.
Some bad news, isn’t it?
I have treated that Vanda yesterday with difenoconazol. Today I’m going to cut the infected leaves. The plant is in spike, so I hope not to damage it.
I’ve read now about a spirox D, I’ll try to find it.
Thanks again again!