What's eating my columnea 'inferno'?

Columnea 'Inferno' is a vivid trailing indoor hybrid with bright orange-red blooms. Spider mites are its most common foe, exploiting dry heated interiors. Mealybugs tuck into stem joints. Aphids can colonise new growth. Whitefly may appear in stagnant conditions. Keep humidity above 50% year-round — low humidity is the main trigger for pest outbreaks on this cultivar.

Fine webbing and pale speckling on leaf surfaces; foliage turns yellowish-bronze; growth slows, particularly in dry winter air Increase humidity; wipe leaves with a damp cloth; spray with insecticidal soap or neem oil every 5–7 days for three rounds

White waxy fluff at stem nodes and leaf axils; sap-feeding causes leaf yellowing and poor blooming Spot-treat with isopropyl alcohol; apply neem oil spray to all surfaces weekly for 3–4 weeks; isolate infested plants

Clusters of insects on new shoot tips; distorted growth; sticky honeydew accumulates on leaves Rinse with water; apply insecticidal soap; repeat weekly until the population is gone

Cloud of tiny winged insects when foliage is disturbed; nymphs on leaf undersides; honeydew and sooty mould Use yellow sticky traps; spray leaf undersides thoroughly with insecticidal soap every 5 days for four rounds