Behavioral responses of Hippodamia variegata (Coleoptera: Coccinellidae) to volatiles from plants infested by Aphis gossypii (Hemiptera: Aphidae) and analysis of volatile components
In order to investigate the roles of volatiles from host plants in the process of Hippodamia variegata (Goeze) searching for preys, the behavioral responses of the lady beetle adults to volatiles from Aphis gossypii Glover, intact plants, aphid-plant complex and aphid-infested plants were observed w...
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Veröffentlicht in: | K'un ch'ung hsueh pao 2013-02, Vol.56 (2), p.153-160 |
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Zusammenfassung: | In order to investigate the roles of volatiles from host plants in the process of Hippodamia variegata (Goeze) searching for preys, the behavioral responses of the lady beetle adults to volatiles from Aphis gossypii Glover, intact plants, aphid-plant complex and aphid-infested plants were observed with a Y-tube olfactometer. The results showed that the adults were significantly attracted to volatiles from high-density ( greater than or equal to 700 individuals/L) aphids, aphid-plant complex, and aphid-infested Cucumis sativus plants (aphid density greater than or equal to 400 individuals/pot) and Cucurbita pepo var. medullosa plants (aphid density greater than or equal to 200 individuals/pot), while not to volatiles from low-density ( less than or equal to 500 individuals/L) aphids and the intact plants. Dynamic headspace collection was used to extract volatiles from the intact plants, aphid-plant complex and aphid-infested plants, respectively, and the extracted volatiles were analyzed by gas chromatography- |
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ISSN: | 0454-6296 |