"A new product based on nootkatone would have multiple advantages over existing mosquito repellants based on DEET," said Richard Burlingame, Ph.D., who presented the report. "Nootkatone is a broad-spectrum ingredient that has been shown to be effective as a control agent for mosquitoes, ticks and bedbugs. Nootkatone has been used for years to give beverages a grapefruit flavor. It is safe to eat, has a pleasant citrus flavor, is not greasy, both repels and kills insects, and should not have the toxicity concerns that exist for DEET." Burlingame, who is with Allylix, Inc., a renewable-chemical firm in Lexington, Ky., spoke at a symposium entitled "Biopesticides: State of the Art and Future Opportunities." It includes presentations (abstracts appear below) on progress in developing new pesticides isolated from natural sources, or patterned closely after natural products that are effective in pest control.