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  • Coleoptera
  • Springer  (6)
  • Elsevier
  • 1985-1989  (6)
  • 1986  (6)
Collection
Keywords
Publisher
  • Springer  (6)
  • Elsevier
Years
  • 1985-1989  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Cantharidin biosynthesis in a blister beetle: Inhibition by 6-fluoromevalonate causes chemical disarmament (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 853-854 
    Details
    ISSN: 1420-9071
    Keywords: Coleoptera ; Lytta polita ; chemical defense ; cantharidin ; terpenoids ; fluorine ; metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Biosynthesis of cantharidin in a blister beetle,Lytta polita, is effectively inhibited by 6-fluoromevalonate. Inhibition is attributed specifically to the fluorine substituent. Biochemical inhibition has not been demonstrated previously for an arthropod's defensive substance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941552
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  • 2
    Electronic Resource
    Electronic Resource
    Defensive alkaloid in blood of Mexican bean beetle (Epilachna varivestis) (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 204-207 
    Details
    ISSN: 1420-9071
    Keywords: Coleoptera ; chemical defense ; feeding deterrent ; alkaloid ; homotropane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The blood of the Mexican bean beetle (Epilachna varivestis) contains a homotropane alkaloid, euphococcinine (1). The beetles ‘reflex bleed’ when disturbed, thereby deploying the alkaloid, which is provenly deterrent to spiders and ants. Newly emerged adults lack the alkaloid, but the compound builds up to deterrent levels in their blood within days. Eggs and larvae ofEpilachna are devoid of the compound.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952471
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  • 3
    Electronic Resource
    Electronic Resource
    Economics of chemical defense in chrysomelinae (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 1189-1203 
    Details
    ISSN: 1573-1561
    Keywords: Defensive secretion ; egg defense ; allomones ; Salix ; salicin ; Coleoptera ; Chrysomelidae ; monoterpenes ; salicylaldehyde
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chemical defense in chrysomelid larvae (subtribe Chrysomelina and Phyllodectina) is reviewed. Most species secrete autogenous monoterpenes. The diversity of their secretion is interpreted as a mechanism to reduce adaptation by predacious arthropods. The consequences of a host plant shift to the Salicacae are explored. Salicin from these host plants is used as a precursor for the salicylaldehyde secreted by the larvae of many species. This offers several advantages. It provides the larvae with an inexpensive and efficient defense. The recovery of the glucose moiety of the salicin contributes significantly to the larval energy budget. Adults sequester salicin in the eggs at concentrations which are toxic to ants. Owing to this maternal provisioning, neonate larvae produce salicylaldehyde from hatching onwards, whereas other species secreting monoterpenes are not protected at hatching. The secretion of salicylaldehyde by different species is considered to be chemical mimicry reinforcing visual aposematic signals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01639004
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of a volatile attractant forDiabrotica andAcalymma spp. from blossoms ofCucurbita maxima duchesne (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 687-699 
    Details
    ISSN: 1573-1561
    Keywords: Attractant ; Diabrotica virgifera virgifera ; Diabrotica undecimpunctata howardi ; Acalymma vittatum ; indole ; Cucurbita maxima ; electroantennogram ; floral volatile ; Chrysomelidae ; Cucurbitaceae ; Coleoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Fractionation of headspace volatiles fromCucurbita maxima blossoms by high-performance liquid chromatography resulted in the isolation of a single component which was highly active in an electroantennogram bioassay onDiabrotica undecimpunctata howardi antennae. This compound was identified as indole by gas chromatography-mass spectrometry. Field-trapping bioassays were conducted which indicated that indole is a potent attractant of the western corn rootworm,D. virgifera virgifera, and the striped cucumber beetle,Acalymma vittatum. The southern corn rootworm,D. u. howardi, did not respond, despite its strong EAG response. The sex ratio ofD. v. virgifera found in indole-baited traps varied seasonally. Males were trapped in abundance in late July and later September, 1983, while females were more abundant August and early September. The effectiveness of indole as aD. v. virgifera attractant also varied seasonally. A prolonged period of depressed trap catches occurred in early August 1983, during the silking and tasseling period of the corn in the field where trapping was carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012102
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  • 5
    Electronic Resource
    Electronic Resource
    Sex-specific production of ipsdienol and myrcenol byDendroctonus ponderosae (Coleoptera: Scolytidae) exposed to myrcene vapors (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 1579-1586 
    Details
    ISSN: 1573-1561
    Keywords: Dendroctonus ponderosae ; bark beetle ; Coleoptera ; Scolytidae ; myrcene ; aggregation pheromones ; ipsdienol ; myrcenol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Male mountain pine beetles,Dendroctonus ponderosae Hopkins, produced ipsdienol [97.0% ± 0.3S-(+)] and myrcenol (90.3% ± 4.0E) when exposed to myrcene vapors. Females which were exposed to myrcene vapors did not produce any ipsdienol, but did produce low levels of myrcenol (98.0% ± 0.7E). Neither sex produced detectable levels of ipsdienol or myrcenol when fed for 24 hr on lodgepole pine,Pinus contorta var.latifolia Engelmann. The sex-specific conversion of myrcene to ipsdienol and myrcenol suggests that these compounds may have behavioral significance within the species. In addition, the S-(+)-ipsdienol produced by maleD. ponderosae probably functions as a repellent allomone againstIps pini (Say).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020265
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  • 6
    Electronic Resource
    Electronic Resource
    Cellulose digestion inMonochamus marmorator Kby. (Coleoptera: Cerambycidae): Role of acquired fungal enzymes (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 1057-1070 
    Details
    ISSN: 1573-1561
    Keywords: Cellulases ; xylophagy ; cellulolysis ; acquired enzymes ; nutritional ecology ; Monochamus marmorator ; Trichoderma harzianum ; Coleoptera ; Cerambycidae ; Moniliaceae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Larvae of the balsam fir sawyer,Monochamus marmorator Kby. (Coleoptera, Cerambycidae), contain midgut digestive enzymes active against hemicellulose and cellulose. Cellulases from larvae fed on balsam fir wood infected with the fungus,Trichoderma harzianum Rifai (Deuteromycetes, Moniliales, Moniliaceae), were found to be identical to those of the cellulase complex produced by this fungus when compared using chromatography, electrophoresis, and isofocusing. When larvae are maintained on a fungus-free diet, their midgut fluids lack cellulolytic activity, and they are unable to digest cellulose. Cellulolytic capacity can be restored by feeding the larvae wood permeated by fungi. We conclude that the enzymes which enableM. marmorator larvae to digest cellulose are not produced by the larvae. Instead, the larvae acquire the capacity to digest cellulose by ingesting active fungal cellulases while feeding in fungus-infected wood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01638996
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