Why Is My Cactus Loosing Color

Question

I notice the discoloration on my cactus that seems to be spreading. Any reasons why?

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Answer 1

This is one of many fungal infections of cacti, and the "corking" is a symptom of infection.

This will need to be treated by a fungicide.

Here are some articles for more information:

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

https://www.plantinterrarium.com/full-guide-on-cactus-diseases-pests-and-treatments/