What's eating my concrete leaf?

Concrete Leaf is a compact, slow-growing South African succulent rarely troubled by many pests, but mealybugs are the main real-world threat, hiding among its warty, grey-green leaf tips. Root mealybugs are also recorded. Overwatering is far more likely to kill this plant than any insect.

White mealy patches at leaf bases and between the tight rosette; slow growth or leaf wrinkling. Treat with 70% isopropyl alcohol on a cotton swab at each leaf junction. Repeat for at least four weeks.

Shriveling or failure to plump up after watering; white deposits visible on roots or pot interior. Unpot and inspect roots; soak in neem drench, allow to dry, repot in fresh well-draining grit mix.

Subtle stippling on the rough leaf surface; fine webbing in very dry or heated indoor conditions. Wipe leaves with a damp cloth; apply dilute neem oil. Increase airflow and avoid placing near heat sources.