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Benzaldehyde, benzyl alcohol, and benzoic acid were identified in extracts of the abdominal scent brushes of adult male Pseudaletia unipuncta (Haworth). A 4th compound(s) remains unidentified. Benzaldehyde is the major component and represents 86 to 97% of the volatile compounds in 2-day-old moths. Electroantennograms were recorded from male and female antennae in response to stimulation with the scentbrush compounds benzaldehyde and benzyl alcohol, with 2 related aromatic compounds (2-phenyl ethanol and benzyl acetate), and with a carboxylic acid iso-butyric acid. Male and female antennae responded equally to each chemical and the scent-brush compounds were no more stimulating than the non-scent-brush compounds.
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Grant et al. (1972) studied this question.
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