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  • 1
    Electronic Resource
    Electronic Resource
    Changes in the responsiveness of the maxillary styloconic sensilla of Spodoptera littoralis to inositol and sinigrin correlate with feeding behaviour during the final larval stadium
    Amsterdam : Elsevier
    Journal of Insect Physiology 37 (1991), S. 261-268 
    Details
    ISSN: 0022-1910
    Keywords: Spodoptera littorali ; electrophysiology ; feeding behaviour ; inositol ; neural variability ; sinigrin
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-1910(91)90060-D
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  • 2
    Electronic Resource
    Electronic Resource
    A behavioural and electrophysiological study of the role of tarsal chemoreceptors in feeding by adults of Spodoptera, Heliothis virescens and Helicoverpa armigera
    Amsterdam : Elsevier
    Journal of Insect Physiology 36 (1990), S. 743-745+747-756 
    Details
    ISSN: 0022-1910
    Keywords: Helicoverpa armigera ; Heliothis virescens ; Spodoptera frugiperda ; Spodoptera littoralis ; adult feeding ; amino acids ; azadirachtin ; behaviour ; electrophysiology ; neural interactions ; plant extracts ; sugars ; tarsal chemoreceptors
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-1910(90)90048-K
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Behavioural and neurophysiological responses ofSpodoptera littoralis to azadirachtin and a range of synthetic analogues (1995)
    Springer
    Entomologia experimentalis et applicata 77 (1995), S. 69-80 
    Details
    ISSN: 1570-7458
    Keywords: azadirachtin ; azadirachtin analogues ; Spodoptera littoralis ; antifeedant ; behaviour ; electrophysiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The antifeedant activity of azadirachtin and 56 azadirachtin analogues, including 22,23-dihydroazalirachtin, against larvae ofSpodoptera littoralis was investigated using behavioural and electrophysiological bioassays. None of the analogues was as active as azadirachtin, although many showed significant antifeedant activity at high concentrations. The majority of the analogues stimulated a dose-dependent response from a neurone in the medial styloconic maxillary sensilla which correlated with the behavioural activity. Methylation of the hydroxy substitutions on the azadirachtin molecule usually resulted in a decrease in antifeedant activity, as did the addition of bulky groups to the dihydrofuran ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383020
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of age on the responsiveness of peripheral chemosensory sensilla of the turnip root fly (Delia floralis) (1994)
    Springer
    Entomologia experimentalis et applicata 70 (1994), S. 253-262 
    Details
    ISSN: 1570-7458
    Keywords: Delia floralis ; turnip root fly ; electrophysiology ; gustation ; tarsal sensilla ; labellar sensilla
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of insect age on the neural responsiveness of gustatory sensilla was investigated. Electrophysiological recordings were obtained from type A and type D sensilla on the pro- and meso-thoracic tarsi, and from sensilla on the labellum of the turnip root fly,Delia floralis (Fallen) in response to potassium chloride, sucrose and sinigrin. The age of the fly did have an effect on the numbers of sensilla responding to the test stimuli and on the magnitude of the response, but there was no consistent pattern in these effects among sensilla. The labellar sensilla were more responsive to sucrose than the tarsal sensilla and the proportion of flies whose labellar sensilla responded to sucrose was initially low, but increased after day 2 of adult life. In contrast, the number of flies whose tarsal sensilla responded to stimulation with sucrose was initially high and decreased as the flies aged. There was a similar decline in the proportion of tarsal sensilla responding to potassium chloride. Neither the proportion of flies whose tarsal sensilla responded to sinigrin nor the magnitude of the response was influenced by the age of the fly. These finding are discussed in relation to the feeding and host selection behaviour of the fly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380559
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  • 6
    Electronic Resource
    Electronic Resource
    Behavioural and chemosensory responses of the turnip root fly (Delia floralis) to glucosinolates (1994)
    Springer
    Entomologia experimentalis et applicata 71 (1994), S. 41-57 
    Details
    ISSN: 1570-7458
    Keywords: Delia floralis ; turnip root fly ; glucosinolates ; electrophysiology ; gustation ; tarsal sensilla ; labellar sensilla ; sensory physiology ; oviposition behaviour ; structure-activity relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This study investigates the behavioural and neural mechanisms involved in the oviposition behaviour of the turnip root fly,Delia floralis (Fallen). Behavioural studies showed that glucosinolates modulated the oviposition behaviour of the flies on artificial leaves as well as the number of eggs laid in the soil at the base of these leaves. Electrophysiological responses to glucosinolates were obtained from type A and type D sensilla on the prothoracic and mesothoracic tarsi, as well as from the long contact sensilla on the labellum. The neural responses from these sensilla were positively correlated with the oviposition behaviour of the flies and with the number of eggs laid. Of the eleven glucosinolates tested in the behavioural and electrophysiological tests, the flies were most responsive to glucobrassicanapin, gluconapin and glucobrassicin. The type D tarsal sensilla were more responsive to the glucosinolates than either the type A tarsal sensilla or the labellar sensilla. The structure-activity investigations showed that slight modifications to the chemical composition of the glucosinolates resulted in changes in neural activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380568
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  • 7
    Electronic Resource
    Electronic Resource
    Food selection in adults and larvae of three species of Lepidoptera: a behavioural and electrophysiological study (1988)
    Springer
    Entomologia experimentalis et applicata 49 (1988), S. 111-121 
    Details
    ISSN: 1570-7458
    Keywords: Spodoptera littoralis ; Heliothis virescens ; H. armigera ; electrophysiology ; feeding behaviour ; adults ; larvae ; proboscis sensilla ; antifeedants ; phagostimulants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Adults and larvae of Spodoptera littoralis, Heliothis virescens and Heliothis armigera were tested with a range of sugars, amino acids, sugar alcohols and allelochemics. Feeding behaviour was correlated with the electrophysiological responses of maxillary styloconic sensilla in the larvae and proboscis styloconic sensilla in the adult. The neural response was more vigorous in larvae than in adults but otherwise the spectra of responses were similar in the two life stages. Phagostimulants and antifeedants stimulated maximally different sensilla in larvae but not in adults. The responses of adult sensilla to sugars and amino acids were significantly correlated to behaviour in all three species, but only in H. armigera was there a similar correlation with the sugar alcohols and allelochemics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00188244
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  • 8
    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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