Page 1 of 1
Sunburn or Internal Pathogen
Posted: Sun Jan 16, 2022 6:50 pm
by mikethecactusguy
Re: Sunburn or Internal Pathogen
Posted: Mon Jan 17, 2022 9:43 am
by k.maks
I hope I'm wrong but it doesn't look as a sunburn to me.
Second picture from the top reminds me a friend's cactus. She decided to treat damaged epidermis with insecticide and fungicide and brown area stopped spreading. But neither she nor I still didn't manage to identify this thing.
Re: Sunburn or Internal Pathogen
Posted: Mon Jan 17, 2022 3:38 pm
by Aeonium2003
k.maks wrote: ↑Mon Jan 17, 2022 9:43 am
I hope I'm wrong but it doesn't look as a sunburn to me.
Second picture from the top reminds me a friend's cactus. She decided to treat damaged epidermis with insecticide and fungicide and brown area stopped spreading. But neither she nor I still didn't manage to identify this thing.
Interesting. I thought it was only a CA thing. I got that stuff this year. It's almost like rust fungus mixed with sunburn. I haven't found a great way to treat it yet.
Re: Sunburn or Internal Pathogen
Posted: Mon Jan 17, 2022 4:07 pm
by k.maks
Aeonium2003 wrote: ↑Mon Jan 17, 2022 3:38 pm
It's almost like rust fungus mixed with sunburn.
Yes, I would describe it like this too! I saw it on a mature Astrophytum nudum.
Re: Sunburn or Internal Pathogen
Posted: Mon Jan 17, 2022 4:42 pm
by Aeonium2003
k.maks wrote: ↑Mon Jan 17, 2022 4:07 pm
Aeonium2003 wrote: ↑Mon Jan 17, 2022 3:38 pm
It's almost like rust fungus mixed with sunburn.
Yes, I would describe it like this too! I saw it on a mature Astrophytum nudum.
Maybe a mediterranean thing. It only happens in out wet winters.
Re: Sunburn or Internal Pathogen
Posted: Tue Jan 18, 2022 12:14 pm
by k.maks
Aeonium2003 wrote: ↑Mon Jan 17, 2022 4:42 pm
Maybe a mediterranean thing. It only happens in out wet winters.
Could be a high temperature and high humidity area thing
Re: Sunburn or Internal Pathogen
Posted: Wed Jan 19, 2022 1:22 am
by keith
Maybe sunburn because of where you live now ? Sunburn will turn the skin white like it burns all the chlorophyll away. Pathogen I think would have sap leaking and be soft. The black stem almost looks like frost damage ? probably have to cut off the affected parts .
Re: Sunburn or Internal Pathogen
Posted: Wed Jan 19, 2022 1:54 am
by Aeonium2003
I have no idea how it works. Even cut wounds seem to get this disease/infection.
Re: Sunburn or Internal Pathogen
Posted: Wed Jan 19, 2022 3:55 am
by Download
It's possible sunburn let a pathogen in.
I'd treat with fungicide (I personally use mancozeb).