White Bugs on Angel's Trumpet: Likely Aphids, Use Systemic Treatment

White, flat, clustered bugs on stems and leaf undersides of Angel's Trumpet are likely aphids—many species lack the cottony wax of mealybugs. See aphid photos on Angel's Trumpet for comparison.

Recommended Control

Apply a granular systemic insecticide (e.g., Ortho RosePride) to the soil. The plant absorbs it, killing aphids as they feed. Available at garden centers—ask for a soil-applied systemic for ornamentals. Avoid contact sprays; they miss hidden colonies.