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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.

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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:



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