What's eating my hoya clemensiorum?

Hoya clemensiorum is a Bornean species kept as a collector houseplant and shares the common indoor pest vulnerabilities of the genus. Mealybugs top the threat list, with spider mites a close second in heated, dry interiors. Inspect the distinctive large leaves and petioles carefully during routine care.

Cottony white clusters at nodes and leaf undersides; honeydew and sooty mould follow, slowing overall growth. Treat individual spots with isopropyl alcohol, then apply neem oil or insecticidal soap to the whole plant weekly for a month.

Minute bronze or yellow speckling on leaf surfaces; webbing visible under the leaves in moderate to heavy infestations. Increase ambient humidity, rinse foliage, and apply miticide-strength insecticidal soap or neem oil every 5–7 days.

Waxy, limpet-like bumps on stems and large leaf veins; yellowing, premature leaf drop if left untreated. Scrape off with a soft brush, wipe with alcohol, then follow with horticultural oil applications every two weeks.