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

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Abstract

The ecdysteroid agonist KK-42 [1-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’ecdystéroïde: le KK-42 [1-bénzyle-5(E)-2,6-diméthyle-1,5 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’ecdystéroïde 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.

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  1. Department of Zoology, University of Delhi, Delhi, 110 007, India

    Archana Kumari & H. C. Agarwal

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  1. Archana Kumari
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  2. H. C. Agarwal
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Correspondence to H. C. Agarwal.

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Kumari, A., Agarwal, H.C. Growth-Inhibitory Activity of 1-Benzyl-5[E]-2,6-Dlmethyl-1,5-Heptadienyl Imidazole (KK-42) on Spodoptera litura. Int J Trop Insect Sci 18, 365–369 (1998). https://doi.org/10.1017/S1742758400018609

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  • DOI: https://doi.org/10.1017/S1742758400018609

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