Abstract
Cuticular hydrocarbons were used to differentiate among fourteen Aedes albopictus (Skuse) populations from Asia, Brazil, and the United States. Forty cuticular hydrocarbon peaks from each North American population were previously identified using gas chromatography electron impact-mass spectrometry. The same cuticular hydrocarbon peaks were identified in the Asian and Brazilian populations. Samples from three populations were analyzed using capillary gas chromatography chemical ionization mass spectrometry. Total carbon number and branch points were found for four peaks which occurred at equivalent chain lengths > 38.65. Quantitative analyses were performed by flame ionization gas chromatography. All populations contained the same cuticular hydrocarbons but showed differences in percentage composition. Nine of the 14 populations were separable by discriminant analysis of hydrocarbon components. Overlap of the 95% CIs occurred between the two Brazilian populations and among three North American populations. Individual specimens from three North American populations were used as a test group in the discriminant analysis. Correct classification of these individuals by population ranged from 80 to 100%.
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