Cactus and Succulents forum→Anyone know what these spots are from? And how to treat?

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Jun 11, 2021 7:43 AM CST

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Jun 15, 2021 11:39 AM CST
is it black mold?

Jun 18, 2021 7:32 AM CST
its gotta be some kind of fungus?
Name: Baja
Baja California (Zone 11b)
Cactus and Succulents Seed Starter Foliage Fan Xeriscape Container Gardener Hummingbirder
Native Plants and Wildflowers Garden Photography Region: Mexico Plant Identifier Forum moderator Plant Database Moderator
Jun 18, 2021 10:21 AM CST


I don't recognize the problem but it seems like the look is pretty distinctive, with that central ring and the discolored area around it. If you think it's fungus, there are fungicides available (both foliar spray and systemic) which might alleviate the problem.
Name: Bob
The Kau Desert, Hawaii (Zone 12a)
Jun 19, 2021 6:37 PM CST
Since I only see three spots.
You might consider removing the infected leaves and throwing them into the trash bin.
Foliar fungicides tend to make spots on the leaves, especially the ones with the white powder on them. So systemic fungicides are cleaner and in some cases more effective

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