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  • 1990-1994  (4)
  • diet breadth  (2)
  • foraging
  • predation
  • 1
    Electronic Resource
    Electronic Resource
    Relationship between deterrence and toxicity of plant secondary compounds for the alfalfa weevil Hypera brunneipennis (1992)
    Springer
    Entomologia experimentalis et applicata 64 (1992), S. 289-292 
    Details
    ISSN: 1570-7458
    Keywords: Deterrence ; oral dosing ; toxicity ; diet breadth ; Hypera brunneipennis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A variety of plant secondary compounds, several of which are quite widespread in nature were tested for their deterrence to the specialist coleopteran Hypera brunneipennis (Boheman) in short-term behavioral assays. The compounds were nicotine, quinine, sparteine, hordenine, linamarin, amygdalin, sinigrin, morin, juglone, chlorogenic acid, digitonin, mimosine, diosgenin, rutin and ursolic acid. Nine of these were then tested for their post-ingestional effects over one to two weeks of adult life, using fecundity as a measure of the effects. In only one case was there any indication of a detrimental effect or any trend suggesting one. The evolutionary implications of these findings are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341092
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Foraging patterns and dietary mixing in the field by the generalist grasshopperBrachystola magna (Orthoptera: Acrididae) (1994)
    Springer
    Journal of insect behavior 7 (1994), S. 779-793 
    Details
    ISSN: 1572-8889
    Keywords: diet mixing ; foraging ; generalist ; grasshopper ; plant-insect interaction ; omnivory ; Brachystola magna ; Taeniopoda eques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The foraging behavior of a cryptic romaleine grasshopper was observed in its natural habitat in southern Arizona. Individual polyphagy, dietary mixing, and the pattern of feeding on different substrates were monitored. Individuals were found to be extreme generalists with surprising levels of feeding on other insects. Differences in the foraging behavior between grasshopper species are discussed in relation to the habitat, the season, and the different defensive strategies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997126
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Relationship between deterrence and toxicity of plant secondary compounds for the grasshopperSchistocerca americana (1991)
    Springer
    Journal of chemical ecology 17 (1991), S. 2519-2526 
    Details
    ISSN: 1573-1561
    Keywords: Schistocerca americana ; Orthoptera ; Acrididae ; deterrence ; toxicity ; plant defense ; diet breadth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A variety of plant secondary compounds, several of which are quite widespread in nature were tested for their deterrence to the generalist grasshopperSchistocerca americana in short-term behavioral assays. The compounds were coumarin, salicin, tannic acid, gramine, nicotine, quinine, carvone, geraniol, abietic acid, umbelliferone, and ursolic acid. These were then tested for their post-ingestional effects over the whole of the last larval instar. Different methods were employed to mask the taste of compounds that were deterrent in order to ensure that any effects were not due to reduced feeding. In no case was there any indication of a detrimental effect or any trend suggesting one. In two cases, there was a significant increase in growth rate with the addition of the secondary compound to the diet. The evolutionary implications of these findings are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994599
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Responses of two hymenopteran predators to surface Chemistry of their prey: Significance for an alkaloid-sequestering caterpillar (1991)
    Springer
    Journal of chemical ecology 17 (1991), S. 391-399 
    Details
    ISSN: 1573-1561
    Keywords: Lepidoptera ; Hymenoptera ; predation ; sequestration ; chemical ; defense ; cuticle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Larvae ofUresiphita reversalis (Guenée) (Lepidoptera: Pyralidae) sequester quinolizidine alkaloids from their leguminous hosts and store them primarily in the cuticle. Stored alkaloids are lost with the last larval molt. Extracts of late-instar larvae and of pupae were applied to larvae of the potato tuber moth,Phthorimaea operculella (Zeller) (Gelichiidae), which are normally palatable to two hymenopteran predators, the Argentine ant,Iridomyrmex humilis (Mayr) (Formicidae), and the paper wasp,Mischocyttarus flavitarsus (Sauss.) (Vespidae). Larvae ofP. operculella treated with alkaloid extracts ofU. reversalis larval exuviae, or with surface extracts of whole larvae, were deterrent to both predators, compared to untreated prey. Extracts of pupal exuviae added toP. operculella, however, were not deterrent.P. operculella larvae treated with the authentic alkaloids sparteine and cytisine were also deterrent to these hymenopteran predators. Storage of small but concentrated amounts of plant secondary compounds in the cuticle appears to be an efficacious means of defense against at least two common predators of lepidopteran larvae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994340
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    Paper (German National Licenses)
    Fulltext
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