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Growth-Inhibitory Activity of 1-Benzyl-5[E]-2, 6-Dimethyl-1, 5-Heptadienyl Imidazole (KK-42) on Spodoptera litura

Published online by Cambridge University Press:  19 September 2011

Archana Kumari  and
H.C. Agarwal
Archana Kumari
Affiliation:
Department of Zoology, University of Delhi, Delhi-110 007, India
H.C. Agarwal
Affiliation:
Department of Zoology, University of Delhi, Delhi-110 007, India
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Abstract

The ecdysteroid agonist KK-42 [l-benzyl-5(E)-2,6- dimethyl-1,5-heptadienyl] imidazole adversely affected the growth of Spodoptera litura and caused a delay in pupation. The compound also caused adult deformation, increased sex ratio in favour of males, and adversely affected the fecundity and fertility of emergent females. The ecdysteroid 20-hydroxyecdysone, identified by HPLC, was present in treated and control insects. Ecdysone was also detected in only the insects treated with 1 μg/larva KK-42.

Résumé

L'inhibiteur antagonique de la biosynthèses de l'ecdystéroide: le KK-42 [l-bénzyle-5(E)-2,6-diméthyle-l, 5 heptodiényle] imidazole affectait sérieusement la croissance et le développement de Spodoptera litura et retardait la chrysalidation. Cette substance provoquait également des malformations chez adultes et le décalage du sex ratio en faveur de l'augmentation du taux de mâles par rapport aux femelles. De même, le produit affectait négativement la fécondité et la fertilité des femelles émergées. L'ecdystéroide 20-hydroxyecdysone identifié par méthode HPCL, était trouvé tant chez les sujets traités que chez les témoins. De même, l'ecdysone était détectée seulement chez les insectes traités à la dose de 1 μg de KK-42 par larve.

Keywords

[1-benzyl-5[E]-26-dimethyl-15-heptadienyl] imidazoleSpodoptera lituraantiecdysteroidal activityKK-42[1-benzyle-5(E)-26-diméthyle-15 heptodiényle] imidazoleactivité anti-ecdystéroïdaleKK-42
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 18 , Issue 4 , December 1998 , pp. 365 - 369
Copyright
Copyright © ICIPE 1998

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References

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