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  • 1
    Electronic Resource
    Electronic Resource
    Electroantennogram Responses of a Predator, Perillus bioculatus, and its Prey, Leptinotarsa decemlineata, to Plant Volatiles (1999)
    Springer
    Journal of chemical ecology 25 (1999), S. 2313-2325 
    Details
    ISSN: 1573-1561
    Keywords: Hemiptera ; Pentatomidae ; Perillus bioculatus ; Coleoptera ; Chrysomelidae ; Leptinotarsa decemlineata ; electroantennography ; EAG ; tritrophic interactions ; infochemicals ; synomones ; plant volatiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The two-spotted stinkbug, Perillus bioculatus, is a predator of the Colorado potato beetle (CPB), Leptinotarsa decemlineata. Behavioral tests revealed that P. bioculatus is attracted to potato plants, Solanum tuberosum L. (Solanaceae), infested by the CPB. Electroantennograms from the antennae of P. bioculatus were recorded in response to compounds present in the headspace of CPB-infested potato plants. (Z)-3-Hexen-1-ol and 2-phenylethanol elicited the highest EAG amplitudes. Linalool, 4,8-dimethyl-1,3(E),7-nonatriene, nonanal, decanal, and (R)-(+)-limonene evoked lower EAG amplitudes. The major headspace components β-caryophyllene and β-selinene produced only weak EAG responses. Antennal sensitivity of the CPB to (Z)-3-hexen-1-ol was higher than that of P. bioculatus, whereas the stinkburg was more sensitive to 2-phenylethanol, β-caryophyllene, (R)-(+)-limonene, and decanal. Among these compounds, 2-phenylethanol is of special interest since it was observed to be emitted by potato foliage only after being damaged by CPBs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020825924703
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  • 2
    Electronic Resource
    Electronic Resource
    Identification of Volatile Potato Sesquiterpenoids and Their Olfactory Detection by the Two-spotted Stinkbug Perillus bioculatus (2000)
    Springer
    Journal of chemical ecology 26 (2000), S. 1433-1445 
    Details
    ISSN: 1573-1561
    Keywords: Hemiptera ; Pentatomidae ; Perillus bioculatus ; predator electroantennography ; EAG ; GC-EAG ; tritrophic interactions ; sesquiterpenes ; herbivore-induced plant volatiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The predaceous stinkbug Perillus bioculatus is attracted towards volatiles emitted by damaged potato plants. Whereas mechanically damaged plants lost attractiveness 1 h after damage was inflicted, attraction was long-lasting when the plants were damaged by Colorado potato beetles Leptinotarsa decemlineata, a prey of P. bioculatus. A range of sesquiterpenoids was previously shown to be induced upon beetle damage. In order to evaluate the potential role of sesquiterpenoids in the attraction response, volatiles from damaged potato plants were collected and analyzed with GC-MS and GC-EAG. The antennae of P. bioculatus responded to β-caryophyllene, α-humulene, (E)-β-farnesene, (−)-germacrene D, and germacrene D-4-ol. Two sesquiterpenes that coeluted, α-zingiberene and bicyclogermacrene, together also elicited olfactory responses of P. bioculatus, whereas the individual compounds did not. The response of P. bioculatus to a variety of sesquiterpenes at low dosages suggests a role for these compounds in prey detection of this stinkbug.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005535708866
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    Paper (German National Licenses)
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