Journal of Biological Control

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Laboratory evaluation of Trichogrammatoidea bactrae Nagaraja reared on Corcyra cephalonica (Stainton) as an egg parasitoid of Plutella xylostella (Linnaeus) was carried out at 26±1°C and 50-80 percent relative humidity. From each parasitized egg of C. cephalonica, up to 2 parasitoids emerged and there were almost equal chances of getting 1 or 2 parasitoids. Each female parasitized a mean of 4.6 and 6.4 eggs of P. xylostella and C. cephalonica during its mean survival of 1.7 and 2.3 days, respectively, and mean fecundity was 6.3 and 9.1 with a female biased sex ratio (64.6 and 68.6 percent females). The parasitoid failed to emerge from 45.9 and 38.9 percent parasitized eggs of P. xylostella and C. cephalonica. During post-embryonic development, 38.1 and 31.9 percent mortality was observed and maximum mortality was in the pupal stage.

Keywords

Corcyra cephalonica, Egg parasitoid, Plutella xylostella, Trichogrammatoidea bactrae.
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