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2012年49 No.4
Study of the behavioral responses of Odoiporus longicollis to volatiles from banana pseudostems with different physiological status
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Key Words： Odoiporus longicollis，behavioral response，banana pseudostem，volatiles
Abstract：Solid phase microextraction ( SPME) was used to extract volatiles from banana pseudostems in the following
four physiological states:fresh，rotten but not fed on by beetles，rotten and fed on by beetles，and fresh and fed on by
beetles． The extracted volatiles were analyzed by gas chromatography-mass spectrometry ( GC-MS ) ． A total of 10
components were identified from volatiles extracted from fresh and rotten pseudostems that had been fed on by beetles，
whereas a total of 11 components were identified from extracts from rotten pseudostems and fresh pseudostems that had
been fed on by beetles． The extracted volatiles included hydrocarbon，esters，ketone and heterocyclic compounds，the
relative abundance of which differed with pseudostems’physiological state． The species and relative abundance of
extracted volatiles were closely related to damage inflicted by the banana pseudostem weevil． There was a corresponding
reduction in the relative content of the common component allo-ocimene after Odoiporus longicollis Olivier infestation． The
behavioral responses of male and female O． longicollis to extracted volatiles from banana pseudostems in each of the four
physiological states were observed with a double pitfall olfactometer． Both male and female O． longicollis were attracted to
the volatiles from banana pseudostems in different physiological states． Compared to fresh pseudostems，beetle feeding
activity and rottenness enhanced the attractiveness of the extracted volatiles from banana pseudostems to male and female
O． longicollis．