Opinion on fungus or infection: Cataleyas

[SADE2020]

Hope everyone is doing well.

I need your opinion about these spots on leaves and what would be in your opinion be the solution?

These are from 2 Cats growing in a garden, have flowered correctly. Intentity of natural lighting is controlled. Maybe for few weeks wwee overexposed to too much light but not direct sun.

Thank you!

[Ray]

Looks to me like they are being attacked by insects, possibly with a minor secondary infection.

I would not recommend trying to treat anything unless it expands significantly.

[rbarata]

Hello Sade
I had that type of spots in some of my plants. Could never determine its origin but, unless they spread, honestly I never gave it much importance.

[Dimples]

I have some random spots and blemishes on my phals that are similar. Like Ray, I assume it’s minor damage from something and then a small secondary infection. I haven’t ever treated and none of them get worse. No indication of spreading from plant to plant, so I’m happy not worrying about it.

[SADE2020]

The problem is that I am coming from a Big infection spread toany orchids and I now panic that is not well cure or gone.

Why is not treating better than "prevention" ?

Thank you 🙏!

[estación seca]

Most of what I see is mechanical damage - scrapes, scratches. This happens easily to Cattleyas.

I wonder whether the patch of black spots just above a pseudobulb is old scale damage.

Treating when you don't need to selects for resistant diseases and pests. It kills beneficial organisms. Rather than pesticides and fungicides I treat with mixtures of beneficial organisms. These are often sold a plant probiotics.