Journal of Applied Entomology (2003) 127, 236-239

S.A.M. Abdelgaleil and M. Nakatani (2003)
Antifeeding activity of limonoids from Khaya senegalensis (Meliaceae)
Journal of Applied Entomology 127 (4), 236-239
Abstract: Fifteen B,D-secolimonoids of mexicanolide, rearranged phragmalin, methyl angolensate and glycoside types have been isolated from ether and acetone extracts of the stem bark of Khaya senegalensis (Desr.). The antifeedant activity of the isolated compounds was assessed by conventional choice leaf disc method on the third-instar larvae of Spodoptera littoralis (Boisd.). Khayalactol, 1-O-acetylkhayanolide A, 2-hydroxyseneganolide, khayanolide A, khayanolide D and methyl angolensate displayed strong antifeedant activity at 1000 µg/ml with antifeedant percentages of 83.8, 61.9, 60.1, 59.5, 57.1 and 55.7, respectively. 2-Hydroxyseneganolide and khayanolide D showed high activity at 500, 300 and 200 µg /ml while 1-O-acetylkhayanolide A was the only compound that revealed antifeedant activity at a concentration as low as 100 µg/ml. Antifeedant activity was dose-dependent in some of the isolated compounds. Correlation between antifeedant activity of the isolated compounds and chemical structure was discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
Link to article at publishers website
Database assignments for author(s): Samir A.M. Abdelgaleil

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera littoralis