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  • Lepidoptera  (3)
  • Anobiidae  (2)
  • 1995-1999  (2)
  • 1990-1994  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Deathwatch beetle, Xestobium rufovillosum, in historical buildings: monitoring the pest and its predators (1999)
    Springer
    Entomologia experimentalis et applicata 93 (1999), S. 97-104 
    Details
    ISSN: 1570-7458
    Keywords: deathwatch beetle ; Xestobium rufovillosum ; Coleoptera ; Anobiidae ; timber pest
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Trapping and monitoring experiments were conducted in the roof spaces of four buildings infested with deathwatch beetle, Xestobium rufovillosum de Geer (Coleoptera: Anobiidae). Data from sticky traps and an ultra-violet insectocutor showed that adult deathwatch beetles were trapped from May to July. The beetles were attracted to natural and UV light, and more beetles were caught on white coloured traps than yellow, blue or red traps. Deathwatch beetles comprised 30–40% of all arthropods caught. The weekly trap catch of all arthropods, including deathwatch beetle, was positively correlated with ambient temperature. Adult beetles flew in buildings at ambient temperatures greater than 17 °C. Arthropods caught in the buildings were categorised as resident, over-wintering or non-resident arthropods. Predatory spiders comprised 13% of arthropods caught and the predatory beetle, Korynetes caeruleus de Geer, was found in all four buildings. There was no evidence of other predators or parasitoids of the deathwatch beetle
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003824910137
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  • 2
    Electronic Resource
    Electronic Resource
    Host selection behaviour of deathwatch beetle, Xestobium rufovillosum: Oviposition preference choice assays testing old vs new oak timber, Quercus sp. (1998)
    Springer
    Entomologia experimentalis et applicata 89 (1998), S. 193-199 
    Details
    ISSN: 1570-7458
    Keywords: deathwatch beetle ; Xestobium rufovillosum ; Coleoptera ; Anobiidae ; Quercus sp. ; host selection behaviour ; oviposition ; timber pest
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In a choice bio-assay adult female deathwatch beetles were offered two dendrochronologically dated wood blocks from oak timber to study oviposition preference behaviour. There was a clear preference for ovipositing on old wood dating from the 13th to 19th centuries rather than new wood from the 20th century. Control, same-century choice, experiments showed that beetles will oviposit on young wood and that the age of the wood does not alter the overall oviposition potential. Oviposition frequency varied with insect age. Fecundity of insects collected from an infested building was similar to that of insects maintained in culture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003558723537
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  • 3
    Electronic Resource
    Electronic Resource
    Insect antifeedant activity associated with compounds isolated from species ofLonchocarpus andTephrosia (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 365-380 
    Details
    ISSN: 1573-1561
    Keywords: Spodoptera littoralis ; Spodoptera exempta ; Lepidoptera ; Noctuidae ; Lonchocarpus, Tephrosia ; antifeedant ; feeding behavior ; gustatory codes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The antifeedant activity of a series of 21 chalcones, flavanes, and flavanones isolated from the generaLonchocarpus andTephrosia (Leguminosae) was assessed by behavioral and electrophysiological bioassays against larvae ofSpodoptera littoralis andS. exempta. The antifeedant activity is related to the molecular structure of the compounds, and possible modes of interaction with the insect taste receptors are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021771
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  • 4
    Electronic Resource
    Electronic Resource
    Developmental inhibition ofSpodoptera litura (Fab.) larvae by a novel caffeoylquinic acid from the wild groundnut,Arachis paraguariensis (Chod et Hassl.) (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 2917-2933 
    Details
    ISSN: 1573-1561
    Keywords: Spodoptera litura ; Lepidoptera ; Noctuidae ; Arachis paraguariensis ; wild groundnuts ; caffeoylquinic acids ; resistance ; rutin ; quercetin ; phenolics ; growth inhibition ; Arachis hypogaea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A novel compound, 1-caffeoyl-4-deoxyquinic acid (1-CdQA) has been identified along with 3-caffeoylquinic acid (3-CQA) and 5-caffeoylquinic acid (5-CQA) (syn. chlorogenic acid) in the foliage ofArachis paraguariensis, a wild species of groundnut that is highly resistant to attack by the larvae ofSpodoptera litura. When neonate larvae were fed on diets treated with 3-CQA or 1-CdQA, their development was severely inhibited compared to larvae on untreated diets, and the effects were similar in nature and magnitude to those observed for larvae feeding on diets treated with 5-CQA, rutin, and quercetin. The effects of all the compounds were dose related, and their optimal concentration was approximately 3 mM, which corresponds to the total foliar concentration of both caffeoylquinic acids and quercetin diglycosides inA. paraguariensis. After 24 h, the development of third stadium larvae feeding on diets treated with 5-CQA, rutin and 1-CdQA was promoted compared to larvae on control diets, but after 96 hr larvae feeding on treated diets had gained significantly less weight than those on the control diets. 1-CdQA, 3-CQA, and quercetin dyglycosides (previously identified in the foliage ofA. paraguariensis) are considered to be valuable components in resistance of groundnuts toS. litura and may provide useful genetic markers in future breeding for resistance to this pest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00980592
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  • 5
    Electronic Resource
    Electronic Resource
    Behavioral and electrophysiological study of antifeedant mechanisms associated with polyhydroxy alkaloids (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 3167-3196 
    Details
    ISSN: 1573-1561
    Keywords: Spodoptera littoralis ; Spodoptera exempta ; Heliothis virescens ; Helicoverpa armigera ; Lepidoptera ; Noctuidae ; polyhydroxy alkaloids ; piperidine ; pyrrolidine ; castanospermine ; swainsonine ; alexine ; fagomine ; behavior ; electrophysiology ; receptor mechanisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Eleven polyhydroxy alkaloids of plant origin were tested for anti-feedant effects against larvae of the lepidopteransSpodoptera littoralis, Spodoptera frugiperda, Heliothis virescens, andHelicoverpa armigera. Data from behavioral and electrophysiological investigations were correlated to reveal information on the mode of action of the antifeedants. The pyrrolidine DMDP was an effective antifeedant for all four species, whereas the piperidines fagomine and XZ-1 and the pyrrolizidine alexine were all ineffective as antifeedants. The activity of the pyrrolidines CYB-3 and DAB-1, the piperidines DNJ, DMJ, and BR1, and the bicyclic octahydroindolizine castanospermine varied among species. The investigation focuses on the structural similarities between some of the alkaloids and some common phagostimulatory sugars and illustrates a neural interaction involving the neurons that are differentially responsive to alkaloids and sugars. InS. littoralis, the neurons responding specifically to the alkaloids DMDP, DAB-1, and castanospermine and to the sugars fructose, sucrose, and glucose are more active when the compounds are applied singly than when an alkaloid and a sugar are applied together. The implications for the occurrence and functioning of different sugar receptor sites are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00979618
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