What smell do ticks hate most?

Ticks hate several strong, pungent smells that irritate them or interfere with host finding, though no scent alone provides complete protection and should be combined with repellents and protective clothing. Smells ticks hate most include essential oils like lemon eucalyptus oil, which is CDC recommended as effective repellent, eucalyptus oil, peppermint oil, cedarwood oil, lavender oil, tea tree oil, and citronella, which have some repellent properties, with oil of lemon eucalyptus being most effective natural repellent. They hate the smell of garlic, though evidence is limited and garlic consumption does not reliably repel. They hate strong chemical repellents like DEET, picaridin, and permethrin, which are most effective, permethrin is applied to clothing and kills ticks on contact, while DEET and picaridin applied to skin repel. Ticks hate dry, low humidity environments because they need humidity above 80 percent to survive, so dry conditions cause desiccation. While these smells may repel ticks to some extent, ticks will tolerate unpleasant smells if hungry and host is present, so scent repellents are supplemental. Most effective protection is using EPA registered repellents containing DEET, picaridin, or oil of lemon eucalyptus on skin and permethrin treated clothing, wearing long sleeves and pants tucked into socks, staying on trails, avoiding tall grass and leaf litter, and performing thorough tick checks after outdoor activities, as relying on smell alone is not sufficient.