Submitted to: International Society of Chemical Ecology Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 5/14/2001
Publication Date: N/A
Technical Abstract: The hydrocarbon fraction from the internal lipids of developing Helicoverpa zea pupae contained methyl-branched alkanes ranging in size from methylhexacosane (C27) to dimethylnonatetracontane (C51). A second component was observed eluting with the monomethylakanes beginning with methylpentatriacontane (C36). The second component was identified as a trimethyl-branched alkane in which the first methyl group was located on carbon 2, and the second and third methyl groups wereseparated by a single methylene. Components identified by gas chromatography-mass spectrometry were 2,18,20-trimethyltetratriacontane, 2,18,20-trimethylhexatriacontane, and 2,24,26-trimethyldotetracontane. These novel compounds were not detected in the hydrocarbon fraction from the internal lipids of developing Heliothis virescens pupae. These compounds have not been found in the cuticular surface hydrocarbons of larvae, pupae or adults of either species.