What's eating my pseudolithos cubiformis?

Pseudolithos cubiformis is a rare Somali succulent kept as a houseplant. Mealybugs are its primary pest threat, hiding in the angular fissures of the warty body. Scale insects and spider mites can also appear. Good air circulation, dry conditions between waterings, and prompt isolation of new plants are the best defenses.

White waxy fluff tucked into surface grooves; prolonged feeding weakens the body and causes discoloration Apply 70% isopropyl alcohol with a fine brush or cotton swab to each bug; follow up with neem oil spray; repeat every 7–10 days until clear

Hard brown or tan bumps on the stem surface that are difficult to distinguish from the plant's natural texture; sap loss slows growth Scrape off with a soft toothbrush dipped in soapy water or rubbing alcohol; treat with horticultural oil; systemic insecticide for persistent cases

Faint stippling or bronzing on the body surface; fine webbing visible under magnification Increase air movement around the plant; wipe down with a damp cloth; spray with diluted neem oil or insecticidal soap