Journal
JOURNAL OF CHEMICAL ECOLOGY
Volume 42, Issue 2, Pages 149-155Publisher
SPRINGER
DOI: 10.1007/s10886-016-0666-2
Keywords
Aphidoletes aphidimyza; Aphis gossypii; Honeydew; Attraction; Oviposition; Phenylacetaldehyde
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Funding
- Ministry of Agriculture, Forestry and Fisheries of Japan
- Grants-in-Aid for Scientific Research [15K07220] Funding Source: KAKEN
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Many natural enemies of insects use honeydew as a volatile cue to locate hosts or prey, as an oviposition stimulant, and as an arrestant for foraging. The aphidophagous gall midge Aphidoletes aphidimyza (Rondani) (Diptera: Cecidomyiidae) has predacious larval stages and can be used to control aphid populations, especially in greenhouses. Previous studies have shown that the honeydew, excreted by the aphid Myzus persicae, attracts A. aphidimyza, but the crucial attractants have not been identified. Using an olfactometer, we studied behavioral responses of female A. aphidimyza to volatiles emitted from honeydew excreted by the aphid Aphis gossypii on eggplants. The volatiles attracted female midges and induced oviposition. Moreover, using gas chromatography coupled with mass spectrometry (GC/MS), we identified phenylacetaldehyde as the attractant compound in the honeydew, although it did not induce oviposition in olfactometer experiments.
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