What's eating my adromischus marianiae?

Adromischus Marianiae is most at risk from mealybugs, particularly root mealybugs that infest the soil undetected in the dry, gritty compost this species prefers. Foliar mealybugs and scale insects also occur. Because this species sits low to the soil surface, carefully inspect the crown and root zone regularly.

White powdery coating on roots and lower stem; unexplained wilting or failure to thrive; plant rocks loosely in pot Unpot, remove all soil, soak roots in insecticidal soap solution for 10 minutes, dry fully, repot in fresh gritty mix

Fluffy white deposits in leaf axils and crown; honeydew; leaves pucker or yellow Spot-treat with isopropyl alcohol; follow with systemic neem oil drench and foliar spray

Hard waxy bumps on stems; sap depletion; sticky residue around the base of the plant Manually remove scales; apply neem oil or horticultural oil; monitor for re-emergence every two weeks