Repellent Shampoo with Citronella and Eucalyptus Tree Oils A conditioning, strongly frarant shampoo to repel flies, fleas, ticks and other biting insects. 1 Citronella & Eucalyptus Oils Repels flies, fleas, ticks and parasites. Have soothing and antiseptic properties. Leave your dog’s skin feeling cool and energised. The sharp, fresh and distinctive fragrance controls pet odour.