couple possible diseases, asking for diagnosis and treatment

[j_orchids]

Hello,

I have a couple orchids with potential problems. See pics below.

One is a Brassavola Little Stars that has been developing black tips or spots near the tip. I recently had this blackness spread down it's newest leaf and the leaf eventually turned yellow and shed. The black spot near the tip on the leaf on the right is the newest spot to develop (a few days ago). The problem seemed to start about 7 weeks ago, but didn't worry me because the black tips were small and I figured it was normal or just due to their being recently relocated or due to sporadic watering patterns.

The other is Beallara Patricia McCully. Spots started earlier this spring (few months ago), but I thought it might just be sunburn. I moved this and the plant discussed above to my new office building where they are now in indirect light in a northeast window, but now several other of the leaves are affected.

On both plants damaged areas seem dry.

Any help would be greatly appreciated.

Thanks in advance.

~ Jon