Sex-Related Perception of Insect and Plant Volatiles in Lygocoris pabulinus |
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Authors: | Astrid T Groot Radbout Timmer Gerrit Gort Gerrit P Lelyveld Falko P Drijfhout Teris A Van Beek J Hans Visser |
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Affiliation: | (1) Research Institute for Plant Protection (IPO-DLO), P.O. Box 9060, 6700 GW Wageningen, The Netherlands;(2) Laboratory of Entomology, Wageningen Agricultural University (WAU), Wageningen, The Netherlands;(3) WAU, Section of Mathematics, Wageningen, The Netherlands;(4) WAU, Laboratory of Organic Chemistry, Phytochemical Section, Wageningen, The Netherlands |
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Abstract: | We recorded electroantennograms of male and female Lygocoris pabulinus antennae to 63 insect and plant volatiles. EAGs were between 100 and 500 V. Overall, male EAGs were about twice the size of female EAGs. In both sexes, largest EAGs were recorded to (E)-2-hexenyl butanoate and (E)-2-hexen-1-ol. Response profiles were similar in both sexes. However, male antennae were more sensitive to a number of esters, especially the butanoates and pentanoates. Female antennae were more sensitive to nine of the 19 plant volatiles, i.e., to hexan-1-ol, heptan-1-ol, 1-octen-3-ol, 2-heptanone, (R)-carvone, linalool, geraniol, nerol, and methyl salicylate. Sexual differences in responses suggest that males are more sensitive to insect-produced pheromone-type compounds, whereas females are more sensitive to plant compounds for their orientation towards oviposition sites. |
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Keywords: | Heteroptera Miridae green capsid bug sex pheromone electroantennogram odors plant volatiles esters (E-2-hexenyl butanoate (E)-2-hexen-1-ol |
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