Field attraction of Mediterranean fruit fly, Ceratitis capitata (Wiedemann) to synthetic stereoselective enantiomers of the ceralure B1 isomer.
Stereoselectively synthesized enantiomers of ethyl cis-5-iodotrans-2-methylcyclohexane-1-carboxylate (ceralure B1), a potent lure for male Mediterranean fruit flies, were tested in the laboratory and the field against laboratory reared sterile flies. The (-)-ceralure B1 enantiomer was significantly more attractive than the (+)-ceralure B1 antipode. Dose-response studies of the above compounds demonstrated that (-)-ceralure B1 and to a lesser extent, racemic ceralure B1, captured consistently more male flies than trimedlure, the current male attractant used in detection programs. Longevity tests demonstrated that, over a three-week period, both (-)-ceralure B1 and racemic ceralure B1 caught significantly more flies than trimedlure. The synthesis of specific enantiomers of ceralure B1 shows great promise as a male attractant that could replace trimedlure for detection and delimitation in action programs aimed at this exotic pest.
Jang
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US Pacific Basin Agricultural Research Center, USDA-ARS, Hilo, Hawaii, USA.
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Carvalho
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D000818:Animals; D033622:Ceratitis capitata / Q000187:drug effects / Q000502:physiology*; D003509:Cyclohexanecarboxylic Acids / Q000737:chemistry* / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D007300:Insect Control; D008297:Male; D010675:Pheromones / Q000494:pharmacology*; D013237:Stereoisomerism; D013997:Time Factors
D003509:Cyclohexanecarboxylic Acids; D010675:Pheromones; C045211:trimedlure