What's eating my hoya 'krimson queen'?

Hoya 'Krimson Queen' is a waxy-leaved houseplant most commonly plagued by mealybugs, which hide in leaf axils and the curled variegated growth. Spider mites, aphids on new shoots, and scale insects on stems are also frequent indoor threats. The plant's thick leaves resist many pests but infestations spread quickly if unchecked.

White cottony clusters in leaf axils, at nodes, and on the undersides of leaves; sticky honeydew and sooty mold Dab each colony with a 70% isopropyl alcohol-soaked cotton swab; spray with neem oil solution; repeat every 5–7 days

Fine yellow or bronze stippling on leaf surfaces; tiny webbing on undersides in low-humidity conditions Increase humidity; rinse the plant in the shower; apply insecticidal soap or neem oil spray weekly for 3 weeks

Flat or domed brown bumps along stems and leaf midribs; weakened, yellowing growth Scrape off with a toothbrush; wipe with alcohol; apply horticultural oil; repeat every 2 weeks until gone

Soft-bodied insects clustered on tender new growth and developing leaves; distorted, curled new shoots Rinse off with water; apply insecticidal soap; inspect regularly in spring when the plant pushes new growth