How do you treat aphids?

[1] Beneficial insects such as ladybugs are natural enemies of aphids. So they'll kill them for you. [2] Otherwise, the most life-friendly human interventions are by horticultural and neem oils, and insecticidal soaps and soapy water sprays. If aphids are ravaging edibles, the oils must be applied the day before eating. The soaps can be harvested the same day.