How do you treat aphids?
 Beneficial insects such as ladybugs are natural enemies of aphids. So they'll kill them for you.  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.
Biological, botanical and cultural controls are ways to treat for aphids. Biological and botanical treatments include employing horticultural oils against egg stages, insecticidal soaps against non-egg stages and soapy water sprays against infestations as well as encouraging such beneficial aphid-eating insects as lacewings, ladybugs, soldier beetles and syrphid flies. Cultural controls involve removing such weedy host plants for aphids as mustard and sowthistle.
Introduction of and support for natural predators and use of botanical and chemical controls are ways to treat lime trees for aphids. Treatment by natural enemies focuses upon such voracious aphid-eaters as ladybugs and syrphid flies. Botanical controls include horticultural oils against eggs and insecticidal soaps against immature and mature stages whereas chemical controls at their eco-friendliest list as active ingredients pyrethroids.
Biological, cultivational and botanical controls are ways to treat peppers for aphids. The insects in question (Aphidoidea superfamily) tend to cluster on the underside of leaves. Their populations will decline or disappear if the area is kept clear of leaf drop and yard debris, the food chain is managed by introducing aphid-eating ladybugs, the grass is mowed low, and the treatment is organized around horticultural oils against eggs and insecticidal soaps against immature and mature…
Ants move small insects called aphids from plant to plant The aphids are protected by the ants while the ants feed on sugary honeydew produced by the aphids?
No, aphids do not eat ants. Specifically, aphids are herbivorous insects that therefore feed on plants. While feeding, aphids secrete honeydew, which is a favorite of the kinds of ants whose diet is sugar based. In return, ants actually are known to defend aphids against such beneficial predatory insects as ladybugs.
Fruit flies are not aphids. Aphids are bugs that attach themselves to a leaf and draw fluid from a plant. Aphids on an oak tree look like a round bump. The liquid on their backs is harvested by ants. The best way to kill the aphids is probably by a dose of ladybugs, available at a local nursery; but there are also oil and/or chemical treatments.