In this study, volatile compounds emitted by disturbed nymphs and adults of the stink bug Antiteuchus innocens were identified by gas chromatography-mass spectrometry as follows: (E)-hexenal, α-pinene, (E)-2-heptenal, n-decane, (E)-2-octenal, n-undecane, n-dodecane, and n-tridecane. The major components were (E)-2-hexenal, (E)-2-heptenal, and n-undecane. The same compounds, except α-pinene and (E)-2-octenal, were found in the dorsal glands and metathoracic glands of nymphs and adults, respectively. Extracts of exocrine glands did not elicit antennal responses of the adults, or affect the behavior of fifth instar nymphs, which suggests that these compounds are likely involved in the A. innocens defense rather than functioning as an alarm pheromone.
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Vol. 102 • No. 2