What's eating my echeveria 'perle d'azur'?

Echeveria 'Perle d'Azur' is a silvery-blue hybrid rosette succulent. Mealybugs are the most frequent pest, nesting in the leaf axils and at the rosette crown. Root mealybugs may infest the potting mix without obvious above-ground symptoms. Avoiding overhead watering and keeping humidity low prevents most pest and disease issues.

White woolly colonies in leaf joints; leaves become sticky, yellow, and soft Treat with isopropyl alcohol swabs; spray with diluted neem oil every week for a month

Slow wilting and stunting; white powdery insects coating roots when checked Unpot and inspect; soak roots in neem oil solution; repot in fresh gritty substrate

Sudden collapse; grubs found eating the root crown when plant is lifted Apply Steinernema kraussei nematodes to soil in spring; destroy any grubs found manually