Orange oil is an essential oil produced by cells within the rind of an orange fruit (Citrus sinensis fruit). In contrast to most essential oils, it is extracted as a by-product of orange juice production by centrifugation, producing a cold-pressed oil. It is composed of mostly (greater than 90%) d-limonene, and is often used in place of pure d-limonene. Orange oil can be used in green pesticides for biological pest control. It can exterminate or control ants and other insects by erasing their scent-pheromone trail indicators, or melting their exoskeleton, eliminating the infestation or disrupting re-infestation. Orange oil is also known to be useful to control, but not exterminate, drywood termites (Incisitermes), killing only those who come into direct contact with it. In the practice of aromatherapy, orange oil is described as providing various benefits, including the possibility of "reducing stress", controlling "anxiety", enabling "relaxation" and "lifting mood.