Black spots on leaves: Aerangis fastuosa, Bulbophyllum longissimum & Phalaenopsis bra
Hi!
I have black dots on the leaves of different orchids. It does not spread quickly and looks harmless. I am curious about what it can be. Do you know what it can be?
The humidity is between 65-80%. Fans for air circulation are running. Temperatures are between 60 ° F - 75 ° F (16 ° C - 24 ° C).