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Studies on the population control of Pieris brassicae L. by Apanteles glomeratus L.

Published online by Cambridge University Press:  19 September 2011

G. K. Karnavar
Affiliation:
Department of Biology, University of Swaziland, Private Bag, Kwaluseni, Swaziland
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Abstract

Parasitization of P. brassicae L. by A. glomeratus L. was found to be between 63.79 and 76.52% in Farm 1 and 92.68 and 93.43% in Farm 2. Population density of the parasitoids ranged between 35.16 ± 6.05 and 57.76 ± 13.20. The developmental period of the parasitoids within the host was 21 days and the pupal period 9 to 10 days. The population of the parasitoid showed a steady increase during November–December. The rate of pupation of P. brassicae showed a decline from 36.21% in mid-November to 23.48% in later November in Farm 1 with an early crop. In Farm 2 with a late crop the pupation rate dwindled from an already low 7.32 to 6.57% by late December.

Type
Research Article
Copyright
Copyright © ICIPE 1983

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