Effectively repellent essential oils include cinnamon oil, lemongrass oil, clove oil, peppermint oil, lavender oil, thyme oil, tea tree oil, and, finally, eucalyptus oil. All or any of these oils have laid claim to both killing as well as repelling bed bugs.
Scale insects such as aphids, whiteflies, mites, and earwigs are killed on contact with eucalyptus oil. For these pests, combine 1 teaspoon eucalyptus oil with 1/2 teaspoon liquid hand dish
Tea tree oil bed bug spray. The insecticidal properties of tea tree oil make it a great natural treatment to get rid of bed bug infestation. You can use the homemade tea tree spray to kill off bed bugs in hard to reach places, like cracks, crevices, and furniture joints.
Eucalyptus saligna oil kills bedbugs, and eucalyptus-based insect repellents may be effective.  In a 1730 book, Englishman John Southam claimed to have learned a formula for a herbal tincture, from a freed slave in Jamaica, that both attracted live bedbugs and killed all life stages of bedbugs (including eggs).
Tea tree ( where to get it) Tea tree oil, also known as melaleuca, is native to Australia where the aboriginals used them for a variety of health and skin-related issues including treating bug bites. Tea tree oil is highly antimicrobial and antibacterial that it kills bed bugs and their eggs. It has a strong disinfecting smell that also helps deter the bugs.
Lavender essential oil may be effective in repelling bed bugs from the skin. This is primarily has a powerful scent that is disliked by a bed bug but loved by almost everyone. Using lavender oil is a win-win for you since they may help you repel bed bugs while comforting you with their lovely smell at the same time.