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  • Schistocerca gregaria  (2)
  • deathwatch beetle  (2)
  • 2015-2019
  • 1995-1999  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Azadirachtin:-advances in understanding its activity as an antifeedant (1996)
    Springer
    Entomologia experimentalis et applicata 80 (1996), S. 23-26 
    Details
    ISSN: 1570-7458
    Keywords: allelochemicals ; secondary plant metabolites ; feeding ; Spodoptera littoralis ; Schistocerca gregaria ; Locusta migratoria ; electrophysiology ; contact chemoreceptors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194716
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    Paper (German National Licenses)
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  • 2
    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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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Photooxidation of Nimbin and Salannin, Tetranortriterpenoids from the Neem Tree (Azadirachta indica) (1997)
    Springer
    Journal of chemical ecology 23 (1997), S. 2841-2860 
    Details
    ISSN: 1573-1561
    Keywords: Azadirachtin ; nimbin ; salannin ; antifeedant ; growth inhibition ; Azadirachta indica ; Spodoptera littoralis ; Locusta migratoria ; Schistocerca gregaria ; photooxidation ; photoisomerization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Nimbin and salannin, major triterpenoids accompanying azadirachtin in extracts of neem (Azadirachta indica) seeds, were photooxidized by UV light in the presence of oxygen to more polar, unstable intermediates that rearranged on silica gel to two final products in which the furan ring had been oxidized to isomeric hydroxybutenolides. The isomeric hydroxybutenolides were also readily formed when a crude extract of triterpenoids from neem seeds was irradiated, and both isomers of salannin have been isolated from seeds. Photooxidation of nimbin and salannin proceeded much faster than that of azadirachtin. All photoproducts showed some biological activity againstSpodoptera littoralis, Locusta migratoria, andSchistocerca gregaria. Isonimbinolide was as potent as azadirachtin at inhibiting feeding in all three species, and it also inhibited the growth ofS. littoralis. Isosalanninolide showed potent antifeedant and growth inhibitory activity againstS. littoralis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022523329255
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