Acta Entomologica Sinica (2005) 48, 331-336

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Su-Fen Bai, Xue-Xin Chen, Jia-An Cheng, Wen-Jun Fu and Jun-Hua He (2005)
[Effects of host age at the time of oviposition, superparasitism and host starvation after parasitism on the growth of Cotesia plutellae larvae and their teratocytes]
Acta Entomologica Sinica 48 (3), 331-336
Abstract: The host Plutella xylostella L. parasitoid Cotesia plutellae (Kurdj.)system was used to study the effects of superparasitism, host age at the time of oviposition and host starvation after parasitism on the growth of the parasitoid larvae and their teratocytes in host larvae. The results showed that the percentage of pseudoparasitism increased and the developmental duration of parasitoid larvae was variable when the 4th instar host larvae were parasitized as compared to those when the 2nd and 3rd instar larvae parasitized. More teratocytes were present in host haemocoel with their diameters distinctly decreased after the host larvae were superparasitized as compared to those normally parasitized only once, and the growth of parasitoid larvae was obviously stunted with the increase of degree of superparasitism. After the parasitized host larvae were starved for 62 h, the number of teratocytes decreased and the activity of teratocytes was reduced in the host larvae, and the growth of parasitoid was also arrested at the same time, suggesting that there is a positive interaction relationship among the growth of host larvae, parasitoids and teratocytes. These results indicated that superparasitism, host age at the time of oviposition and host nutritional status after parasitism had obvious effects on the growth of the parasitoid larvae and their teratocytes in host larvae.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Su-Fen Bai, Jia-An Cheng, Xue-Xin Chen

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Plutella xylostella
Cotesia vestalis (parasitoid) Plutella xylostella