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Effects of KK-42, an imidazole derivative, on rearing and reproductive performance of Bombyx mori L. during the hot, wet season

  • Kamalendu Banerjee (a1) and Debes Chandra Deb (a1)

Abstract

Experiments on the effects of KK-42, an anti-juvenile hormone imidazole derivative, on the rearing and reproduction of Bombyx mori L. were carried out in a hot, wet summer in West Bengal, India. A single dose of 3 μg KK-42/larva induced precocious metamorphosis in a bivoltine hybrid (KPGB × P5) race of B. mori when applied topically to freshly moulted (less than 1-h old) fourth instars, and increased their rearing performance over control tetramoulters. However, cocoon and shell weights, shell ratio and filament length were reduced by the anti-JH treatment. Final body weight and head capsule width of the treated fourth instars were significantly higher than those of the controls. Bivoltine trimoulter males also showed good capacity for mating with multivoltine Nistari females. The possibility of obtaining three-way multi-bi hybrid eggs during the wet part of summer in a tropical climate is discussed.

Les effets de KK-42, une hormone anti-juvénile dérivée de l'imidazole ont été étudiés sur l'élevage et la reproduction du papillon à soie, Bombyx mori L. Les expériences ont été conduites, in situ, dans l'Etat du Bengale en Inde, au cours d'un été chaud et pluvieux. Une dose unique de 3 μg de KK-42 par larve induisait une métamorphose précoce chez la race bivoltine hybride (KPGB × P5) de B. mori, une fois que le produit était appliqué par contact sur le corps des larves de 4ème stade nouvellement émergées (à moins d'une heure après la mue). La même dose augmentait la performance d'élevage des larves en comparaison des témoins du même âge. Cependant le poids du cocon et de la coquille, de même que la relation coquille/longueur du fil de soie étaient réduits sous l'effet de l'hormone anti-juvénile. Enfin, le poids corporel et la largeur de la capsule crânienne des larves de 4ème stade traitées, étaient plus élevés par rapport aux témoins. Les mâles issus des hybrides bivoltines ont montré leur aptitude à s'accoupler avec les femelles multivoltines de race Nistari. Les possibilités d'obtention des oeufs multi- et bi-hybrides pendant la période pluvieuse d'été dans un climat tropical y sont discutées.

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Corresponding author

Corresponding author: DCD.

References

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Akai, H., Kimura, K., Kiuchi, M. and Shibukawa, A. (1984) Effect of antijuvenoid treatment on cocoon and cocoon filaments in B. mori. J. Seric. Sci. Jpn 53, 545546.
Akai, H., Kiuchi, M. and Kimura, K. (1986) Effect of anti-JH treatment on the size and fine structure of cocoon filament of B. mori. J. Seric. Sci. Jpn 55, 388396.
Akai, H. and Mauchamp, B. (1989) Suppressive effect of an imidazole derivative, KK-42 on JH levels in haemolymph of Bombyx larvae, J. Seric. Sci. Jpn. 58, 7374.
Asano, S., Kuwano, E. and Eto, M. (1987) Threshold size for precocious metamorphosis by an antijuvenile hormone in silkworm larvae, Bombyx mori L. Appl. Ent. Zool. 22, 423424.
Gu, S. H., Lin, F. J. and Chow, S. (1992) Effect of imidazole on developmental determination of the silkworm (Lepidoptera: Bombicidae). Ann. Entomol. Soc. Am. 85, 298303.
Kanda, T., Kiguchi, K., Urayama, J. M., Aoki, A., Kuwano, E. and Eto, M. (1985) Induction of precocious trimoulting silkworm by antijuvenile hormone and the physical properties of the cocoon filament and fabrics. Bull. Seric. Exp. Stn. 30, 123149.
Kawaguchi, Y., Akagi, S., Koga, K., Fujii, H. and Kuwano, E. (1993) Egg formation in KK-42 induced trimoulters of B. mori. Sci. Bull. Fac. Agric. Kyushu Univ. 47, 16.
Kimura, K., Kiuchi, M. and Akai, H. (1986) Effects of juvenile hormone analogue and anti-JH treatments on the number and size of silkworm eggs. J. Seric. Sci. Jpn 55, 335337.
Kiuchi, M. and Akai, H. (1985) Increase of cocoon shell weight and shell ratio by anti-JH administration during the fifth larval instar in B. mori. J. Seric. Sci. Jpn 54, 527528.
Kiuchi, M., Kimura, K. and Akai, H. (1985) Induction of trimoulters from a tetramoulter strain of B. mori by anti-JH treatment. J. Seric. Sci. Jpn 54, 7781.
Kiuchi, M., Abe, S. and Akai, H. (1986) Growth and food efficiency in precocious trimoulter silkworms induced by administration of an anti-JH compound. J. Seric. Sci. Jpn 55, 246251.
Krishnaswami, S. (1986) New Technology of Silkworm Rearing. Reprint Bulletin No. 2, Central Silk Board Publication, pp. 123.
Kubota, T., Kiuchi, M. and Akai, H. (1988) Effect of repeated treatments of the anti-JH on dietary efficiency and size of the cocoon filament in precocious trimoulter silkworms. J. Seric. Sci. Jpn. 57, 409414.
Kuwano, E., Takeya, R. and Eto, M. (1983) Terpenoid imidazoles: New anti-juvenile hormone. Agric. Biol. Citem. 47, 921923.
Kuwano, E., Takeya, R. and Eto, M. (1985) Synthesis and antijuvenile hormone activity of 1-substituted 5(E)-2,6-dimethyl 1–5 heptadienyl imidazoles. Agric. Biol. Chem. 49, 483486.
Kuwano, E., Kiuchi, M. and Eto, M. (1988) Induction of precocious metamorphosis by 1–5 disubstituted imidazoles with a non-terpene chain. Agric. Biol. Chem. 52, 16191620.
Narasimhanna, M. N. (1988) Manual of Silkworm Egg Production. Central Silk Board Publication, pp. 95112.
Okuda, K. K., Kuwano, E., Eto, M. and Yamashita, O. (1987) Anti-ecdysteroid action of some imidazole derivatives on pupal-adult development of the silkworm, B. mori (Lepidoptera, Bombycidae). Appl. Eni. Zool. 22, 370379.

Keywords

Effects of KK-42, an imidazole derivative, on rearing and reproductive performance of Bombyx mori L. during the hot, wet season

  • Kamalendu Banerjee (a1) and Debes Chandra Deb (a1)

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