Essential Oils to Repel Mosquitos, Ticks and Other Insects. Learn how to make a mosquito and tick repellent with dōTERRA essential oils. Safe for all ages (babies, toddlers, kids) and dogs. DIY Homemade Bug Spray for ants, chiggers, fleas, flies, gnats, lice, mosquitos, spiders and ticks. Made with dōTERRA TerraShield Repellent Blend, Eucalyptus and Lemongrass essential oils. #EssentialOilsforAnimals