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Essential Amino Acid Methyl Esters: Major Sex Pheromone Components of the Cranberry White Grub, Phyllophaga anxia (Coleoptera: Scarabaeidae)

Zhang, Aijun ; Robbins, Paul ; Leal, Walter ; Linn Jr., Charles ; Villani, Michael ; Roelofs, Wendell

In: Journal of Chemical Ecology, 1997, vol. 23, no. 1, p. 231-245

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    Titre
    • Essential Amino Acid Methyl Esters: Major Sex Pheromone Components of the Cranberry White Grub, Phyllophaga anxia (Coleoptera: Scarabaeidae)
    Auteur
    • Zhang, Aijun. Department of Entomology, NYS Agriculture Experiment Station, Cornell University, Geneva, New York, 14456
    • Robbins, Paul. Department of Entomology, NYS Agriculture Experiment Station, Cornell University, Geneva, New York, 14456
    • Leal, Walter. Department of Entomology, NYS Agriculture Experiment Station, Cornell University, Geneva, New York, 14456
    • Linn Jr., Charles. Department of Entomology, NYS Agriculture Experiment Station, Cornell University, Geneva, New York, 14456
    • Villani, Michael. Department of Entomology, NYS Agriculture Experiment Station, Cornell University, Geneva, New York, 14456
    • Roelofs, Wendell. Department of Entomology, NYS Agriculture Experiment Station, Cornell University, Geneva, New York, 14456
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:312250
    Summary
    Chiral capillary gas chromatographic-electroantennographic detection (GC-EAD) analysis indicates that L-valine and L-isoleucine methyl esters are the major sex pheromone components released by females of the cranberry white grub, Phyllophaga anxia (LeConte). The GC retention times and GC-mass spectrometry of the two natural compounds were identical to those of authentic standards. Of five reproducible GC-EAD active components revealed with female volatiles, the L-valine and L-isoleucine methyl esters elicited the strongest male antennal responses. The ratio of L-valine and L-isoleucine methyl esters was determined to be 3:1 by analysis of pheromone gland extracts. Chirality was shown to be critical by GC-EAD, since only the L-form of these amino acid methyl esters elicited an EAD response. In field experiments conducted in Massachusetts, a synthetic 3:1 blend of L-valine and L-isoleucine methyl esters on a rubber septum was attractive to P. anxia males