Help Identifying Pathogen on Phalaenopsis - leaf spots possible crown blackening
I have had this phalaenopsis for 1.5-2 years, and I have not had problems with it. It has always had some blackening/discoloration compared to my other phalaenopsis, but I thought that was just its coloration.
Recently I got spider mites and treated everything with a soap/alcohol mixture that I found online. The treatment worked well for the mites, but the drenching of the soil killed a lot of my plants, and my orchids seemed unhappy. I repotted them into a volcanic rock medium, which I realized quickly was just too dry for them, so I repotted them again into an orchid medium about 1.5 weeks later (but a lot of damage had been done to the roots - I removed a lot of bad roots on the other orchid (not pictured here), but the orchid in question was actually pretty ok root-wise at that time).
It has been about 3 weeks since repotting, and yesterday -when going to water it - I noticed a pretty badly diseased leaf (pictured). The leaf underneath that one also seems affected, though early stages. The crown also seems to have some blackening (but I am pretty sure this has always been this black/purple discoloration), and I noticed today that the visible root also seems to have some blackening.
I have consulted the St. Augustine link multiple times, and I asked my local extension program, but I have not been able to lock down a solid cause/pathogen that is affecting my orchid. I am hoping someone on here might have some insight for how/if I can save this orchid and what might be affecting it.
I never mist the orchids. I water them once a week. They live in my kitchen, which is not very humid right now.
|
Threaded Mode
