What's eating my hoya obovata?

Hoya Obovata is an indoor succulent-leafed hoya most troubled by mealybugs, which hide in leaf axils and along the thick stems. Spider mites and scale insects are secondary threats, especially in dry heated rooms. Fungus gnats can colonize overly moist soil. Inspect the waxy foliage monthly.

White cottony fluff in leaf axils, stem joints, and root crowns; leaves yellow and the vine becomes weak and stunted. Remove with alcohol-dipped cotton swabs; spray with insecticidal soap or diluted neem oil. Repeat weekly and isolate the plant from others.

Hard or waxy brown bumps fixed to stems and the undersides of thick leaves; leaves turn yellow and sooty mold may develop below. Scrape off with a soft toothbrush; apply horticultural oil to all surfaces. Repeat every 2 weeks for 6 weeks to catch crawlers.

Fine silvery speckling on leaf surfaces, faint webbing at petioles; worst in winter when indoor air is very dry. Wipe leaves with a damp cloth; increase humidity around the plant and spray with diluted neem oil weekly until clear.