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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