Abstract
The perfume fixative Exaltolide® (pentadecanolide or 15-hydroxypentadecanoic acid e-lactone) extends significantly the attraction of trimedlure for adult Mediterranean fruit flies, Ceratitis capitata (Wiedemann), probably through its action as a volatility depressant. Exaltotide is comparatively nonvolatile, so it persists as the trimedlure evaporates; and as expected from Raoult’s Law, the volatility of the trimedlure diminishes as its mole fraction decreases. Exaltolide exhibited no selectivity in pressing the volatility of the individual isomers in trimedlure. Because Exaltolide is too costly for practical use, inexpensive compounds representing a variety of different types and several musks were tested for their efficiency in extending the action of trimedlure. The best of these were butyl phthalate, butyl oleate, l-octadecanol, diethyl ethylphenylmalonate, and several synthetic musks. Their effect on the attraction of trimedlure has not yet been investigated. No specific structure was found preferable for depressing the volatility of trimedlure.
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