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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Authors: | Y Sato |
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Institution: | (1) Department of Zoology, Faculty of Science, Kyoto University, 606 Sakyo, Kyoto, Japan |
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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. |
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