Mold or mealybugs on cactus?
Hello! So I've been lurking on this site for a while and decided to register in order to ask this question.
I recently bought a round-looking cactus from Wal-Mart. I took it out of the peat that it came with and re-potted it in a mix of potting soil and perlite, along with river rocks near the drainage hole and at the top of the soil.
It has grown some sort of white cotton-like fuzz on it, specifically around the base of the spines at the top. I'm not sure if it's some sort of mold or a mealybug infestation. I'd be grateful for any help in identifying the issue. Thank you in advance!