Citronella oil is popular as a natural insect repellent. An example of a synthetic insect repellent is DEET. This acts as a natural insect repellent. Metofluthrin is a pyrethroid used as an insect repellent. Lavender essential oil is also used as an insect repellent. Cineole-based eucalyptus oil is used as an insect repellent and biopesticide. Nepetalactone is a mosquito and fly repellent. Distributors may disguise the drug as everyday substances such as fertilizer or insect repellent. It is also an insect repellent and a flea-killing substance. Breadfruit contains phytochemicals having potential as an insect repellent. Use of EPA-registered insect repellent is recommended when outdoors. This is believed to act as an insect repellent. This may include the use of insect repellent and proper clothing. Other groups recommend items such as hat, gloves, insect repellent, and an emergency blanket. DEET is not an effective repellent.