Fungus? Or something else?
Posted: Sat Feb 17, 2024 5:59 pm
I have two different cacti, both I believe are Myrtillocactus geometrizans forma cristata. Each has problems but I'm having a hard time diagnosing what's going on.
Cactus 1 has been inside under grow lights in the same pot for about 5 years. It has been watered about once a month and fertilized every other year.
It doesn't look quite like scale. I'm not familiar with other cactus ailments and I'm not finding pictures that look similar.
Photo
https://www.dropbox.com/scl/fi/fpqake8f ... rcq9t&dl=0
Cactus 2 was outside in the Phoenix area for about 5 years in a large pot. I repotted it last fall (August) into a different pot. I had cut arms off it a few months before (May). It's been indoor under grow lights since September. Currently watered about once a month.
The yellowing/browning is radiating from the aeroles. It had some damage from high humidity and over watering a few years ago, but that has since hardened and looks more like corking. But there are some areas that look more like an infection.
Photo
https://www.dropbox.com/scl/fi/j1q3hjrw ... oa3va&dl=0
Photo
https://www.dropbox.com/scl/fi/9g90035u ... m516b&dl=0
I'd love any help or ideas you have on what these issues could be.
Cactus 1 has been inside under grow lights in the same pot for about 5 years. It has been watered about once a month and fertilized every other year.
It doesn't look quite like scale. I'm not familiar with other cactus ailments and I'm not finding pictures that look similar.
Photo
https://www.dropbox.com/scl/fi/fpqake8f ... rcq9t&dl=0
Cactus 2 was outside in the Phoenix area for about 5 years in a large pot. I repotted it last fall (August) into a different pot. I had cut arms off it a few months before (May). It's been indoor under grow lights since September. Currently watered about once a month.
The yellowing/browning is radiating from the aeroles. It had some damage from high humidity and over watering a few years ago, but that has since hardened and looks more like corking. But there are some areas that look more like an infection.
Photo
https://www.dropbox.com/scl/fi/j1q3hjrw ... oa3va&dl=0
Photo
https://www.dropbox.com/scl/fi/9g90035u ... m516b&dl=0
I'd love any help or ideas you have on what these issues could be.