What smell do ants hate?

Ants hate several strong smells that disrupt their pheromone trails or irritate their sensory receptors, with the most commonly cited smells being peppermint, vinegar, citrus, cinnamon, and coffee, though smell alone rarely eliminates colonies permanently. Peppermint oil with its strong menthol scent is one of the top smells ants hate because it disrupts scent trails that odorous house ants use to navigate from nest to food, and diluted peppermint oil sprayed around entry points, baseboards, and windows can deter foraging temporarily, though its effect fades once dry. White vinegar with its acidic smell is disliked by ants and is useful for wiping down countertops and trails to erase pheromone markers, using a 50-50 vinegar and water solution. Citrus smells including lemon, orange, and citronella are disliked by ants and can be used to clean surfaces. Cinnamon powder has a strong spicy smell that ants avoid and can be sprinkled near entry points to block trails temporarily, as does black pepper and cayenne pepper which irritate them. Coffee grounds are said to repel ants due to strong odor, though scientific evidence is limited. Other smells ants hate include clove oil, tea tree oil, and eucalyptus. However, pest control professionals emphasize that while these smells can deter ants short-term and make areas less attractive, they do not kill the queen or colony, so for lasting control you need sanitation by storing food sealed and cleaning crumbs, sealing cracks with caulk, and using gel baits containing fipronil or borax that workers carry back to eliminate the entire colony within days, rather than relying solely on smells ants hate.