Hello, i'm new to the forum and to orchids. I recently bought a Den and i believe it has a pest in it but i have no idea what it is. I've got black spots under the leaves and some of them are becoming yellow.
I started a post at this link
Dendrobium Emma White- black spots + yellow leaf
Some of you on the forum suggested bug some mentionned mites. I've posted pictures of my den. do you think it is mites? these photos are from saturday and sunday and now the leaves are yellower than that.
Many thanks for reading