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  • 1
    Electronic Resource
    Electronic Resource
    (R *,S *)-5-hydroxy-4-methyl-3-heptanone male-produced aggregation pheromone ofSitophilus oryzae (L.) andS. zeamais motsch (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 1263-1274 
    Details
    ISSN: 1573-1561
    Keywords: Aggregation pheromone ; attractant ; (R * S *)-5-hydroxy-4-methyl-3-heptanone ; (R * R *)-5-hydroxy-4-methyl-3-heptanone ; sitophilure ; Sitophilus oryzae ; S. zeamais ; S. granarius ; Coleoptera ; Curculionidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A male-produced aggregation pheromone, common to the rice weevil,Sitophilus oryzae, and the maize weevil,S. zeamais, was isolated and identified from hexane extracts of highly absorbent paper disks exposed individually to young virgin male weevils. A combination of preparative column and gas-liquid chromatography of disk extracts yielded purified natural pheromone. When analyzed by nuclear magnetic resonance spectroscopy and gas chromatography-mass spectrometry, the structure of the natural pheromone, “sitophilure,” proved to be (R *,S *)-5-hydroxy-4-methyl-3-heptanone, of unknown enantiomeric composition. Synthetic racemic pheromone was highly attractive to males and females of both rice and maize weevils. In addition, both sexes of the granary weevil,S. granarius (L.) were attracted to the racemic preparation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024114
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  • 2
    Electronic Resource
    Electronic Resource
    Chemistry and functions of exocrine secretions of the antsTapinoma melanocephalum and T. erraticum (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 253-263 
    Details
    ISSN: 1573-1561
    Keywords: Tapinoma melanocephalum ; Tapinoma erraticum ; pygidial gland ; sternal gland ; actinidine ; chemistry ; attractant ; arrestant ; repellent ; alarm behavior ; cephalic extract ; Solenopsis geminata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Volatile constituents produced by ant workers belonging to the speciesTapinoma melanocephalum andT. erraticum have been analyzed by gas chromatography-mass spectrometry. The pygidial (=anal) gland secretion ofT. melanocephalum is fortified with 6-methyl-5-hepten-2-one and actinidine (the mass spectrum of which is corrected in this paper). An unidentified compound was detected in cephalic extracts. The pygidial gland secretion ofT. erraticum was also dominated by 6-methyl-5-hepten-2-one, in addition to two isomers of iridodial, and iridomyrmecin. The sternal glands contained iridodial and C15-C20 hydrocarbons. Workers ofT. melanocephalum effectively utilize their pygidial gland secretions as an alarm-defense system during aggressive encounters with workers ofSolenopsis geminata. 6-Methyl-5-hepten-2-one is active as a releaser of alarm behavior, and actinidine is repellent to workers ofT. melanocephalum. Cephalic extracts possessed attractant and arrestant properties for workers of this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01025886
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