The difficulties to analyze an insect pheromone have been well known, and various analytical methods have been reported. 1,2 One can point out some difficulties concerning the analysis of insect pheromones. The amounts of the compounds are very small, and many homogenized species are required to collect the pheromones. Also, many preparation procedures are needed to reduce the lipid components. For rare insect species, abundant measurements would be required. Here, we propose an alternative method to collect the sex-attractant pheromone from just one firefly, without causing any physical damage to it.Ohba has already successfully obtained the sex-attractant pheromones of the firefly Genus Pyrocoelia Gorham, using organic solvent extraction, and has confirmed their biological activities. 3,4 The purpose of the present study is to detect sexattractant pheromones by gas chromatography mass spectrometry (GC/MS), and to characterize their chemical properties. We report on the first detection of sex-attractant pheromones of firefly Pyrocoelia oshimana NAKANE, by gas chromatography mass spectrometry.
ExperimentalFireflies Pyrocoelia oshimana NAKANE were collected from a field site on Hakedake, Tokunoshima Island, Kagoshima prefecture. We put one female firefly in a clean glass bial, which had been washed using hexane, and dried at 200˚C in an electric oven. We did not observe any chemical background Ogawacho, Kodaira, Japan *2 Kanagawa Prefectural Daishi Highschool, Yotsuyashimocyo, Kawasaki, Japan *3 Materials Characterization Central Laboratory, Waseda University, Okubo, Shinjuku, Japan *4 Yokosuka City Museum, 95, Fukatadai, Yokosuka, Japan