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Insect antifeedants from Tephrosia elata Deflers

Published online by Cambridge University Press:  19 September 2011

M. D. Bentley ,
A. Hassanali ,
W. Lwande ,
P. E. W. Njoroge ,
E. N. Ole Sitayo  and
M. Yatagai
M. D. Bentley
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
A. Hassanali
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
W. Lwande
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
P. E. W. Njoroge
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
E. N. Ole Sitayo
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
M. Yatagai
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
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Abstract

Two antifeedants, isopongaflavone and tephrosin have been isolated from Tephrosia elata. Tephrosin displayed high activity against Spodoptera exempta, while isopongaflavone was shown to be very active against Maruca testulalis and Eldana saccharina. Rotenone was found to be active as an antifeedant against S. exempta, E. saccharina and M. testulalis. Insects in the orders Coleoptera, Hymenoptera, Lepidoptera and Diptera, all associated with T. elata seed pods, were identified.

Résumé

Deux antifondants, l'isopongaflavone et le tephrosin sont ete isoles de Tephrosia elata. Le tephrosin a montre la tres grande activité contre Spodoptera exampta, tandis que l'isopongaflavone a montre d'etre tres active contre Maruca testulalis et Eldana saccharina. On a trouve que la rotenone etait active comme un antifondant contre S. exempta, E. saccharina et M. testulalis. On a identifie que les insectes dans les groupes de Coleoptera, Hymenoptera, Lepidoptera et Diptera sont êtes tous associes avec les cosses des graines de T. elata.

Keywords

AntifeedantsTephrosia elataisopongaflavonetephrosinrotenonetetrahydroisopongaflavoneAntifondantsTephrosia elataisopongaflavonetephrosinrotenonetetrahydroisopongaflavone
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 1 , February 1987 , pp. 85 - 88
Copyright
Copyright © ICIPE 1987

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References

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