Impact of Chitin Synthesis Inhibitor Diflubenzuron on the Feeding Physiology of Papilio demoleus (Lepidoptera: Papilionidae)

  • P. Somasundaram
  • S. Chockalingam


The effect of topical application and oral administration of diflubenzuron on the feeding budget in the fifth instar larva of Papilio demoleus has been studied. The LD50 and LC50 values of diflubenzuron were 13.50 and 9.00μg/larva/48 hr respectively. Topical application was found more efficacious in producing 50% mortality at a comparatively minimum dose of 9.00 μg. The growth efficiency was reduced by 44.54% in oral administration and 38.19% in topical application at the highest sublethal dose over that of control larvae. Not only the growth of the larvae of P. demoleus was inhibited, but the adults showed morphological deformities.


Nous avons étudié l’effet de l’application topique et de l’administration orale de diflubenzuron sur le budget de nourriture chez les larves de Papilio demoleus dans le cinquiéme stade centre mues. Les valeurs LD50 et LC50 de diflubenzuron étaient respectivement de 13.50 et 9.00μg/larvae/48 hr. L’application/topique s’est révélée plus efficace en produisant 50% mortalité à une dose relative ment minimale de 9.00 μg. L’efficaciate dé developpement des larves fut réduite de 44.54% pour l’administration orale at de 38.19%) pour l’application topique à la dose sousmortelle maximale par comparison avec des larves controles.

Non seulement le development des larves de P. demoleus était inhibé mais encore l’adulte emergant montrait des déformites morphologiques.


Diflubenzuron Papilio demoleus Sublethal dose growth efficiency food utilization 


Diflubenzuron Papilio demoleus dose sousmortelle efficacité de development utilization de nourriture 


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© ICIPE 1988

Authors and Affiliations

  • P. Somasundaram
    • 1
  • S. Chockalingam
    • 1
  1. 1.Zoological Research LaboratoryThiagarajar CollegeMaduraiIndia

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