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J Chem Ecol

Title:		Sex pheromone of the Spanish population of the beet armyworm Spodoptera exigua
Author(s):		Acin P; Rosell G; Guerrero A; Quero C;
Address:		"Department of Biological Chemistry and Molecular Modelling, IQAC-CSIC, Jordi Girona 18-26, 08034, Barcelona, Spain"
Journal Title:		J Chem Ecol
Year:		2010
Volume:		20100624
Issue:		7
Page Number:		778 - 786
DOI:		10.1007/s10886-010-9817-z
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"The pheromone composition of the Spanish population of the beet armyworm (BAW), Spodoptera exigua (Lepidoptera: Noctuidae), was identified. Analysis of female gland extracts showed the presence of compounds Z9,E12-14:Ac (1), Z9-14:Ac (2), Z11-16:Ac (3), Z9,E12-14:OH (4), Z9-14:OH (5), and Z11-16:OH (6) in a ratio of 26:11:1:22:31:9. The amount of compound per gland ranged from 2.08 ng for 5 to 0.09 ng for 3. However, analysis of female volatiles by SPME revealed only the presence of compounds, 1, 2, 3, and 5 in a 34:40:4:22 ratio. In electroantennogram assays, compound 1 elicited the highest response, and the C14 acetates evoked higher electrophysiological responses than the corresponding alcohols or C16 isomers. In a wind tunnel, no behavioral difference was observed between formulations based on the gland extracts and female volatiles. In both cases, males responded as when virgin females were used as the attractant source. Compound 1 alone elicited upwind flight by males, but required the presence of compound 5 in a 80:20 to 40:60 ratio for full activity. Ternary mixtures of 1, 5 and the minor components did not improve the performance of the 1+5 blend in a 60:40 ratio. In the field, the mixture 1+5+3 in a 56:37:7 ratio was the most attractive formulation, and is expected to be useful in future pest control strategies"
Keywords:		"Animals Chromatography, Gas Female Male Sex Attractants/*chemistry Sexual Behavior, Animal Spodoptera/*physiology Volatile Organic Compounds/chemistry/isolation & purification/pharmacology;"
Notes:		"MedlineAcin, Patricia Rosell, Gloria Guerrero, Angel Quero, Carmen eng Research Support, Non-U.S. Gov't 2010/06/24 J Chem Ecol. 2010 Jul; 36(7):778-86. doi: 10.1007/s10886-010-9817-z. Epub 2010 Jun 24"