What smell do termites hate most?

Termites hate several strong smells that disrupt their ability to find wood or that have insecticidal properties, but the smells they hate most are often cited as orange oil, clove oil, cedarwood, and vinegar, though smell alone rarely eliminates entire colonies with millions of members. Orange oil contains d-limonene which is toxic to drywood termites on direct contact when injected into wood galleries and has a strong citrus smell that termites avoid, and it is used in some natural spot treatments. Clove oil and clove bud oil contain eugenol which has repellent and insecticidal properties against termites in lab studies. Cedarwood oil and cedar mulch contain natural compounds that are somewhat resistant to termites and have a strong woody smell they dislike, though cedar is not termite-proof. Vinegar with its acidic smell can kill some termites on direct contact but does not penetrate colonies. Other smells termites are said to hate include garlic, cinnamon, tea tree oil, and mint, which are used in DIY sprays. However, subterranean termites live underground and follow moisture and cellulose cues rather than smell alone, so strong odors may deter foraging in a small area temporarily but will not cause them to abandon a large colony or stop feeding on structural wood. Professional pest control emphasizes that non-repellent termiticides like fipronil are effective because termites cannot detect them and carry them back to the colony, whereas strong repellent smells can cause budding where termites create new colonies elsewhere. So while orange oil and clove oil are most disliked, professional treatment is needed for elimination.