Mystery black dots on my masdevallia

[judyzhusf]

Anyone know if these black dots are part of the nature of this plant or if its something I should action on?

This is a masdevallia lychniphora

[Roberta]

I don't think that they're part of the natural colors of the leaves. An important question is, "Are they getting bigger?" One way to determine that is to draw a circle around the spots with a Sharpie, and just observe. If getting bigger, or spreading to other leaves, maybe an issue. If not, likely not a problem. Other folks on the Board are much more knowledgeable than I am on possible diseases and treatments.

[judyzhusf]

Thanks Roberta, I think that's the right approach as well. Maybe I'll spray with Physan (just a drop in 4 oz water) just to be safe.

[estación seca]

Black spots generally come from cultural issues. Be sure temperatures and humidity are correct before spraying blindly.

[Jmoney]

agree with watching them. I get lots of small black dots due to heat stress. My problem is that I like coccinea, veitchiana. They do not like 83 degree summer days in my greenhouse. Now that it is cooler the new growth is clear green.

[judyzhusf]

It must have been from the grow house that it came from. My house is basically a fridge so maybe it will do better now.