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  • 1
    Electronic Resource
    Electronic Resource
    Induction of indirect defence aganist spider-mites in uninfested lima bean leaves
    Amsterdam : Elsevier
    Phytochemistry 30 (1991), S. 1459-1462 
    Details
    ISSN: 0031-9422
    Keywords: (E)-β-ocimene, (E)-4,8-dimethyl-1,3,7-nonatriene. ; Leguminosae ; Lima bean ; Phaseolus lunatus ; headspace analysis ; indirect defence ; induction ; leaves ; terpenoids
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(91)84186-V
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  • 2
    Electronic Resource
    Electronic Resource
    Response of predatory mites with different rearing histories to volatiles of uninfested plants (1992)
    Springer
    Entomologia experimentalis et applicata 64 (1992), S. 187-193 
    Details
    ISSN: 1570-7458
    Keywords: Phytoseiulus persimilis ; plant volatiles ; Lima bean ; tomato ; cucumber ; Solanum spp. ; Y-tube olfactometer ; tritrophic interactions ; rearing history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The behavioural response of the predatory mite Phytoseiulus persimilis to volatiles from several host plants of its prey, spider mites in the genus Tetranychus, was investigated in a Y-tube olfactometer. A positive response to volatiles from tomato leaves and Lima bean leaves was recorded, whereas no response was observed to volatiles from cucumber leaves, or leaves of Solanum luteum and Solanum dulcamara. Different results were obtained for predators that differed in rearing history. Predators that were reared on spider mites (Tetranychus urticae) on Lima bean leaves did respond to volatiles from Lima bean leaves, while predators that had been reared on the same spider mite species but with cucumber as host plant did not respond to Lima bean leaf volatiles. This effect is compared with the effect of rearing history on the response of P. persimilis to volatile allelochemicals of prey-infested plant leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00162991
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Leaf age affects composition of herbivore-induced synomones and attraction of predatory mites (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 373-386 
    Details
    ISSN: 1573-1561
    Keywords: Cucumber plant ; Tetranychus urticae ; Phytoseiulus persimilis ; Acari ; herbivore-induced synomone ; tritrophic interaction ; oximes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We investigated the olfactory response of the predatory mitePhytoseiulus persimilis to cucumber leaves infested with prey, the herbivorous spider miteTetranychus urticae. The predators responded to volatiles from young rather than old infested cucumber leaves. GC-MS analysis of the head-space of spider mite-infested, artificially damaged and undamaged cucumber plants showed that herbivore-induced plant volatiles were present among the volatiles of both old and young infested cucumber leaves. The major components of the herbivore-induced plant volatiles were (3E)-4,8-dimethyl-1,3,7-nonatriene and (E)-β-ocimene: these compounds are known to attract the predatory mites. In addition, we found three oximes (2-methylbutanalO-methyloxime, 3-methylbutanalO-methyloxime, and an unknown oxime) in the headspace of both old and young infested cucumber leaves. 3-MethylbutanalO-methyloxime and the unknown oxime were much more abundant in the headspace of infested old cucumber leaves. The potential adaptive value of differential attractiveness of cucumber plant leaves of different age is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064444
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  • 4
    Electronic Resource
    Electronic Resource
    Developmental stage of herbivorePseudaletia separata affects production of herbivore-induced synomone by corn plants (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 273-287 
    Details
    ISSN: 1573-1561
    Keywords: Pseudaletia separata ; Cotesia kariyai ; Apanteles ; herbivore-induced synomone ; Y-tube olfactometer ; leaf volatiles ; terpenoids ; indole ; regurgitant ; herbivore developmental stage specificity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The female parasitic waspCotesia kariyai discriminated between the volatiles of corn leaves infested by younger host larvaePseudaletia separata (first to fourth instar) and uninfested leaves in a Y-tube olfactometer; the wasps were attracted to the infested leaves. In contrast, when corn plants were infested by the later stages (fifth and sixth instar) of the armyworm, the wasps did not distinguish between infested corn leaves and uninfested corn leaves in the olfactometer. Mechanically damaged leaves were no more attractive than undamaged leaves, and host larvae or their feces were not attractive to the parasitoid. Through chemical analysis, the herbivore-induced plant volatiles were identified in the headspace of infested corn leaves. The herbivore-induced volatiles (HIVs) constituted a larger proportion of the headspace of corn leaves infested by early instar armyworms than of corn leaves infested by late instar armyworms. Application of third-instar larval regurgitant onto artificially damaged sites of leaves resulted in emission of parasitoid attractants from the leaf, whereas leaves treated with sixth-instar regurgitant did not. The function of this herbivore-stage related specificity of herbivore-induced synomones is discussed in a tritrophic context.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036717
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    Paper (German National Licenses)
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