Cactus
Q.

I was wondering what this was I just bought a new San Pedro cactus from a nursery and I’m worried it may be fungus or something

Zone Phoenix AZ | Tyler1291 added on October 13, 2018 | Answered

to worry about. In photo. Cactus stands about a foot and a half tall. And maybe a few inches in diameter.

A.
A.Answers to this queston: Add Answer
drtreelove
Certified GKH Gardening Expert
Answered on October 14, 2018

Yes the spots appear to be fungal infections, possibly initiated with wounding. If it's a recent purchase maybe talk to the nursery. See the section on physical damage in this cactiguide:

https://cactiguide.com/cactipests/

https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/fungal-lesions-on-cactus.htm

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