Miltonia Binotii and Brassada Mivada with tiny(>1mm) black/brown/violet dent spot

[Jopi]

Hello everybody,

I am a fresh orchid grower and I hope you can help me with this problem. I have recently obtained those two orchids Brassada Mivada and miltonia binotii. I ordered them online from a local supplier and they came packed together in the box. They had small black spots (please see the photos attached).But I was not so much concerned about it since my Oncidiums have some black tiny spots here and there but are doing fine. Now I am getting more and more concerned because it looks like (not hundred percent sure) that the number of these spots is increasing. Also I have noticed that on the back of the leaves there is higher number of the spots which probably over time penetrate on the top of the leaf. As a small prevention, I sprayed the leaves with 3% hydrogen peroxide.

I kept those two orchids in my east oriented windowsill in my living room where temperature does not drop bellow 19C. They have sunshine till early afternoon and I live in the Netherlands.

I was googling and all I could find is so ambiguous and nothing really closely depicting my situation.

Now I have noticed that my aerangis citrata has few black spots on the back side of the leaves. When I look videos and pictures of more experienced orchid growers I also see that there are often spots and irregularities on leaves. But since I am new in all this orchid thing I do not know really about what should I worry and what not.

Please look at the photos attached and help me if you can!

Thank you!

J.

[Ray]

I speculate that those are nothing more than "scars" left over from bacterial or fungal infestations resulting from water droplets sitting on the leaves for extended time periods, especially as night fell. Nothing to be concerned about now.

[Jopi]

Dear Ray,
Thank you for the response. Sounds comforting I am still a bit worried because I think that number of those spots is slightly increasing in the last couple of weeks. What would be the best remedy for such an orchid leaf infection and/or prevention?
Thanks,
J.