What's eating my crassula tetragona?

Crassula tetragona (miniature pine tree) is a shrubby succulent most commonly attacked by mealybugs in the junctions between its needle-like leaves. Spider mites can establish on the foliage in low-humidity rooms. Vine weevil larvae are a risk for plants moved outdoors in summer. Fungus gnats trouble overwatered specimens.

White cottony deposits at leaf nodes and stem joints; honeydew residue; weakened or distorted new growth. Swab with isopropyl alcohol; spray plant with neem oil weekly for 3–4 weeks; isolate from other succulents.

Pale stippling along needle-like leaves; fine webbing in branch crotches; foliage dulls and may drop. Rinse foliage; raise humidity; treat with insecticidal soap spray every 5–7 days for 3 cycles.

C-shaped larvae eat roots below the compost surface; plant wilts or topples suddenly; stem base may be chewed. Inspect roots when repotting; remove larvae by hand; apply nematode drench (Steinernema kraussei) in early autumn.