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J Chem Ecol

Title:		"Female sex pheromone of oriental tobacco budworm,Helicoverpa assulta (Guenee) (Lepidoptera: Noctuidae): Identification and field testing"
Author(s):		Cork A; Boo KS; Dunkelblum E; Hall DR; Jee-Rajunga K; Kehat M; Kong Jie E; Park KC; Tepgidagarn P; Xun L;
Address:		"Natural Resources Institute, Central Avenue, ME4 4TB, Chatham Maritime Chatham, Kent, UK"
Journal Title:		J Chem Ecol
Year:		1992
Volume:		18
Issue:		3
Page Number:		403 - 418
DOI:		10.1007/BF00994240
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"Analysis of ovipositor washings from virgin femaleHelicoverpa assulta (Guenee) (Lepidoptere: Noctuidae) from Korea by gas chromatography (GC) linked to electroantennography and GC linked to mass spectrometry resulted in the identification of nine compounds, hexadecanal, (Z)-9-hexadecenal, (Z)-11-hexadecenal, hexadecyl acetate, (Z)-9-hexadecenyl acetate, (Z)-11-hexadecenyl acetate, hexadecan-l-ol, (Z)-9-hexadecen-l-ol, and (Z)-11-hexadecen-1-ol. However, ovipositor washings from females from Thailand contained mainly the 16-carbon aldehydes with very small amounts of (Z)-9-hexadecenyl acetate. Field tests conducted in Korea, China, and Thailand indicated that a binary blend of (Z)-9-hexadecenal and (Z)-11-hexadecenal was sufficient for attraction, although the most attractive ratio of compounds varied with location. In Korea a 20ratio1 blend of compounds was the most attractive, while in Thailand a 7.5ratio1 blend was most attractive. In China both blends of hexadecenal isomers were equally attractive. Addition of the hexadecenyl acetates to the 20ratio1 blend of hexadecenals in the ratio of 1ratio3.3 increased the trap catch of maleH. assulta compared to lures containing the aldehydes alone in Korea but reduced trap catch in China. Addition of the hexadecenyl acetates to the 7.5ratio1 blend of hexadecenals had no significant effect on trap catch in Thailand or China compared to the aldehydes alone. The addition of the 16-carbon alcohols to the aldehydes had a significantly inhibitory effect in all three countries, suggesting they are not pheromone components. Taken together these results indicate thatH. assulta is polymorphic with at least two populations responding to different sex pheromones"
Keywords:
Notes:		"PubMed-not-MEDLINECork, A Boo, K S Dunkelblum, E Hall, D R Jee-Rajunga, K Kehat, M Kong Jie, E Park, K C Tepgidagarn, P Xun, L eng 1992/03/01 J Chem Ecol. 1992 Mar; 18(3):403-18. doi: 10.1007/BF00994240"