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Brown patches

Posted: Sun Feb 11, 2024 5:43 pm
by sachakp
I have had this cactus for 11 years and it has recently developed these brown patches on it. I am new to this forum and wondered if anyone can anyone advise what they are and how to fix it ?
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IMG_9194.jpeg (90.51 KiB) Viewed 2234 times

Re: Brown patches

Posted: Fri Feb 16, 2024 9:03 pm
by Tom in Tucson
It might be a fungus infection on something close to Euphorbia ammak