Composition and novel pattern of emission of defensive scent oils in the larva of the contton seed bugOxycarenus hyalinipennis (Costa) (Heteroptera: Lygaeidae)

Summary differences in composition and pattern of eiission in the scent oils from the two abdominal scent glands in the larva ofOxycarenus hyalinipennis are reported. The scent oils contain hex-2-enal, oct-2-enal, dec-2-enal and 4-oxo-oct-2-enal.We thank D. E. Games for access to mass spectral facilities, M. Rossiter for recording the mass spectra, the Bayero University Higher Degrees Committee for providing funds to T. O. Olagbemiro and PPF International for supply of sample materials.