My cactus has white fungi how do I get rid of it?

Question

My cactus has white fungi how do I get rid of it?

Answer 1

It's probably not fungus it's cochineal scale, a parasitic insect.  Try washing them off with a mixture of dish-soap and water in a spray bottle.  It usually makes the bugs sick and they dehydrate and die.

To tell, take a chunk about the size of a corn kernel off the cactus with a pocketknife or something and smash the clump on a flat surface.  If it turns from white to red, it's cochineal scale.

Answer 2

i think your over watering let it dry out before watering.(soil)

Answer 3

I think it is a result of water on the cactus itself. This could also be the separation by the plant of the salts and other chemicals in your municipal water supply. I would suggest not getting them wet when you water, particularly when the weather may be wet or muggy.

Answer 4

You have to clean the whole plant with soap and water before repotting it and be sure to use a clean medium and place it to a sunny area, fungi loves wet and shady places.