What's eating my congo cockatoo impatiens?

Congo cockatoo impatiens (Impatiens niamniamensis) is an indoor-grown tropical houseplant in most climates. Spider mites are the primary threat, especially in dry indoor air. Mealybugs shelter in leaf axils, and aphids attack soft new growth. Fungus gnats breed in moist compost if the plant is overwatered.

Fine pale stippling on leaves; leaves turn dull and may drop; fine webbing on undersides in heavy infestations Raise humidity with regular misting or a pebble tray; neem oil or insecticidal soap spray on leaf undersides weekly; wipe leaves to remove mite populations

White cottony masses in leaf axils and stem joints; plant looks sticky and grows slowly Dab colonies with a cotton bud dipped in 70% isopropyl alcohol; apply neem oil or insecticidal soap; isolate the plant from others

Adult gnats hovering around compost; larvae damage fine roots causing wilting and yellowing Allow the top inch of compost to dry before watering; use sticky yellow traps for adults; apply Steinernema feltiae nematodes to compost for larval control