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  • Aphis fabae  (2)
  • sex  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Sex attractant pheromone of damson-hop aphid Phorodon humuli (Homoptera, aphididae) (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 3455-3465 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Pheromone ; sex ; attractant ; aphid ; Phorodon humuli ; Homoptera ; Aphididae ; nepetalactol ; monoterpenoid ; electrophysiology ; single cell recording ; mass spectrometry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Behavioral studies using an olfactometer demonstrated that sexual females (oviparae) of the damson-hop aphid,Phorodon humuli, release a pheromone to which males respond. Volatiles produced by the oviparae were analyzed by coupled gas chromatography-single cell recording from the secondary rhinaria on the male antenna and showed the presence of one peak with major activity. Coupled gas chrornatography-mass spectrometry suggested a nepetalactol, which was shown to have the 4aR, 7S, 7aS stereochemistry by synthesis from the corresponding nepetalactone isolated from the labiate plantNepeta mussinii. Although the stereochemistry at carbon-1 is not yet established, a synthetic sample comprising ca. 70% 1S and 30% 1R attracted highly significant numbers of males to water traps placed within and adjacent to a hop garden. Initial studies also indicated attraction of males in both the olfactometer and in the field by volatiles from the primary host.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00982110
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Aphid semiochemicals — A review, and recent advances on the sex pheromone (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 3019-3030 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Aphid ; Megoura viciae ; Schizaphis graminum ; Acyrthosiphon pisum ; Aphis fabae ; Myzus persicae ; Hemiptera ; Aphididae ; pheromone ; alarm ; sex ; antifeedant ; attractant ; host plant ; electrophysiology ; single-cell recording ; GC-MS
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The alarm pheromones are known for many species of aphids, and methods of using the synthetic pheromone to improve control of aphids by contact insecticides and biological agents have been devised. Highly active analogs have been prepared and plant-derived synergists identified. Laboratory studies on compounds obtained by chemical modification of the alarm pheromone and antifeedants derived from non-host plants have led to successful field trials against aphid-borne virus diseases in crops. Strategies for biotechnological production of aphid semiochemicals are described. The sex pheromones for a number of aphids have recently been identified. Further studies on the production, perception, and interspecific attraction of the pheromone components are described and possible uses for the sex pheromone are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00979609
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  • 3
    Digitale Medien
    Digitale Medien
    The combination of electronic monitoring and video-assisted observations of plant penetration by aphids and behavioural effects of polygodial (1992)
    Springer
    Entomologia experimentalis et applicata 62 (1992), S. 233-239 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Aphis fabae ; plant penetration ; electronic monitoring ; video ; antifeedant ; polygodial
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Simultaneous electronic and close-up video recordings were made of behaviour during the initial 15 min of plant contact by adult, apterous Aphis fabae Scopoli on tick bean seedlings (Vicia faba Moench). Electronic techniques accurately determined stylet penetration of plant tissue and there was a close correlation between penetration and periods during which the insect antennae and body were immobile (r=0.994, n=60). Video techniques were then used alone to infer stylet penetration and the behaviour of aphids after various treatments was monitored. In particular, the time to first penetration, the number of penetrations, the mean duration of penetrations and the total time of penetration were observed. Behavioural differences were recorded between tethered (as required for electronic recording) and freelymoving insects as well as between fed and starved insects. The behaviour of starved aphids placed on beans treated with the plant-derived antifeedant, polygodial could not be distinguished from aphids on solvent-treated control beans. However, there were significant differences in behaviour of aphids which had previously been exposed to polygodial on plant or green/yellow paper surfaces for 24 h when compared with insects exposed to solvent alone. The possible modes of action of polygodial are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00353442
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