"1. Give them what they want." Not a great idea, as people can skew the ecosystem into causing more harm. More ants can increase Aphid populations that spread

"1. Give them what they want." Not a great idea, as people can skew the ecosystem into causing more harm. More ants can increase Aphid populations that spread viral plant diseases (see Huanglongbing or citrus greening disease). "2. Peppermint oil." Never tried this one, but seems expensive. Also, most mint products are illegal to import in some areas, given it can carry symbiotic fungus spores that may decimate food crops. "3. Ant moat. " Many species have building skills, and some will even build tiny twig/gravel roads/bridges over dangerous/irritating substances. They are fascinating little creatures, and an important part of the ecosystem. =)