Abstract
The effects of plant-derived chemicals (volatiles) on the attraction of the Spodoptera litura moth to sex pheromones were evaluated using an electroantennogram (EAG). Neuronal responses of male moths to sex pheromone mixtures (SPs) (a 9:1 mixture of synthetic (9Z,11E)-9,11-tetraddecadienyl acetate (Z9E11-14:OAc) and (9Z,12E)-9,12-tetradecadienyl acetate (Z9E12-14:OAc)) and to SPs mixtures with eight plant volatiles (benzaldehyde, (E)-β-caryophyllene, phenylacetaldehyde, 2,6-nonadienal, benzyl alcohol, racemic linalool, longifolene, and (E)-β-ocimene) were also measured. Then, wind tunnels and field trapping bioassays were conducted to determine the influence of plant volatiles on S. litura moth behavioral responses to SPs. The results indicated that benzaldehyde, phenylacetaldehyde, and benzyl alcohol significantly enhanced, and longifolene, (E)-β-caryophyllene, and (E)-β-ocimene had no significant effect on the attractions to SPs, whereas racemic linalool significantly decreased the attraction of male S. litura moths to SPs throughout the olfactory pathway. 2,6-Nonadienal significantly enhanced olfactory responses, but had no significant effect on output behavior. These findings provide foundations in utilization of plant volatiles and sex pheromones to manage the pest and other agricultural pests.
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