san pedro or cowboy or echinopsis pachanoi cactus rotten root symptom under the sunlight in small pot with white rocks decoration

background bad body botany brown cactus close cockscomb cowboy crested damaged death decoration died disease dying echinopsis fresh fungus funnel garden green infected issues natural nature object pachanoi pad part pedro plant pot problem rocks root rot rotten rotting san shape small soft species succulent sunlight symptom textured under unhealthy white wound