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Experimental studies on parasitization byApanteles Glomeratus V. Relationships between growth rate of parasitoid and host age at the time of oviposition

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Abstract

The growth and development ofApanteles glomeratus L. eggs and larvae in the host larva (Pieris rapae crucivora Boisduval) was investigated by calculating their volume. WhenA. glomeratus eggs increase 90 fold in volume after being laid, larvae hatch from them. The larvae grow exponentially and the growth rate of the parasitoid is dependent on the host stage. Being laid in the 1st instar host, the parasitoids grow more slowly than those laid in 2nd–4th instar host. A pupal host stage prevents the parasitoids’ development. When larvae exceed the threshold size of 5.0×108 μ3, they enter the 2nd instar. A few days after they attain the maximum size of 3.3×109 μ3, they moult and egress from the host body.

Résumé

La croissance et le développement des œufs et des larves d’Apanteles glomeratus L. dans leur hôte (Pieris rapae crucivora Boisduval) ont été étudiés par la mesure de leur volume. Quand les œufs manifestent une augmentation de 90 fois du volume au moment de la ponte, l’éclosion se produit. Les larves ont une croissance exponentielle et la vitesse de la croissance du parasite dépend du stade de développement de l’hôte. L’hôte au stade nymphal inhibe le développement du parasite. Quand les larves excèdent le volume seuil de 5.0×108 μ3, elles muent au 2e stade larvaire. Quelques jours après qu’elles aient atteint le volume maximum de 3.3×109 μ3, elles muent encore une fois et les larves du 3e stade sortent de l’hôte.

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Authors and Affiliations

  1. Department of Zoology, Faculty of Science, Kyoto University, 606, Sakyo, Kyoto, Japan

    Y. Sato

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  1. Y. Sato
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Sato, Y. Experimental studies on parasitization byApanteles Glomeratus V. Relationships between growth rate of parasitoid and host age at the time of oviposition. Entomophaga 25, 123–128 (1980). https://doi.org/10.1007/BF02374314

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  • DOI: https://doi.org/10.1007/BF02374314

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