A year ago or so, my cactus started developing yellow spots all over and was diagnosed with a fungal infection. As instructed, I got an antifungal spray (copper-based) and was spraying it once a week or so. As far as the yellow spots go, I do not think it helped all that much. Still, the cactus was growing fine, so I did not worry too much. Eventually I gave up on that spray as it did not really make any difference.
That is, until I had a closer look at it a couple of days back and saw this:
Now, I can clearly see at least two mushroom-like hyphae that are visibly macroscopic in size! Both seemed to be simply growing out of the soil next to the cactus. In fact, the largest one was impaled on it.
I removed the bits I could reach manually and sprayed the cactus again for the first time in many months. My questions now are:
- Are those fungi just growing next to the cactus or are they feeding on it somehow with their roots (or whatever they have in place of roots)?
- Is it likely that they are related to the fungus causing the yellow spots?
- Have I done enough to get rid of them or do I need to do anything more extreme like replanting my cactus completely?
Thank you very much in advance!
Update: after removing the hyphae, an even bigger one grew out of nothing overnight:
I wonder what species this is?