It appears that Nikola Tesla the cactus has a pretty bad case of
mealy bugs. As attackpoint is conveniently integrated into my life already, I will use it to document treatment efforts. The infestation is extensive (and observation gives me the hibbly-jibblies). I intend to ultimately use a combination of topical alcohol, capsaicin, and the insecticide verticel to treat Nikola.
Day 1 Treatment: I removed around fifty mealy bugs and much accumulated cottonlike secretion covering the top part of the cactus using tweezers. I left an application of 70% ethanol spray on for two hours, then rinsed it off with water. I mean to leave the cactus alone tomorrow to let it recover, then apply more alcohol. I have some concerns about killing the cactus, but there already is discoloring and deterioration on the outside of the cactus.