Identifying problem with phal

[richard.feldman48]

I often find it extremely difficult to identify problems with plants. I use the St. Augustine site, which has a wealth of information. But then too many things look too similar for me to figure out what I'm dealing with. The attached photo is of a Phal growing in S/H. It's under lights in my basement. Watered frequently, fertilized with K-lite weekly(100ppm). 75 degrees during the day, cooler at night. Humidity is usually 40-50%. The leaves have been growing and seem strong. The root system is decent. But it's got the irregular brown patches you can see in the photos. It looks something like what's shown in the photos of Edema https://staugorchidsociety.org/culturepests-environmental-edema.htm) . But then maybe it's one of the bacterial infections of leaves shown on that page (https://staugorchidsociety.org/culturepests-diseases.htm). Or something else entirely. Any advice would be appreciated.

Rich

 

[big923cattleya]

Either bacterial brown spot, Acidovorax sp. or Fusarium wilt.
That leaf with all of the dark brown/black streaking in it is alarming and I would remove it ASAP.
The other one with all of the leaves showing damage looks more like Fusarium.
One thing I have learned over the last 6 years while growing underlights is that these guys need to dry off between waterings. Not bone dry but being too wet leads to far more issues?
I have never been a huge advocate of repeated applications of fertilizer. Especially when plants are not in active growth. If not actively growing, why is weekly feedings needed.
I could be mistaken but I thought edema causes raised lesions or bumps, not sunken in.

 

[SelectOrchids]

Textbook virus symptoms. Dispose of the plant.

 

[orchid527]

I agree with it likely being virused. Unless this is a special plant to you, just throw it away. Saving it is not worth the effort or risks. Even if you decide to try to save it, it will be years before it looks good again. Your odds are poor. Bigger question is are other plants having the same problem. Looks like your conditions should work for phals. Good luck. Mike