Effect of Host Egg Density on Parasitism and Adult Emergence in <i>Trichogramma chilonis</i> Ishii (Hymenoptera: Trichogrammatidae) in Two Systems

R. C. Yadav; S. P. Singh; S. K. Jalali; N. S. Rag

doi:10.18311/jbc/2001/4134

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Authors

R. C. Yadav
Project Directorate of Biological Control (lCAR) Post Bag No. 2491, H. A. Farm Post, Bellary Road Hebbal, Bangalore 560 024, Karnataka ,IN
S. P. Singh
Project Directorate of Biological Control (lCAR) Post Bag No. 2491, H. A. Farm Post, Bellary Road Hebbal, Bangalore 560 024, Karnataka ,IN
S. K. Jalali
Project Directorate of Biological Control (lCAR) Post Bag No. 2491, H. A. Farm Post, Bellary Road Hebbal, Bangalore 560 024, Karnataka ,IN
N. S. Rag
Project Directorate of Biological Control (lCAR) Post Bag No. 2491, H. A. Farm Post, Bellary Road Hebbal, Bangalore 560 024, Karnataka ,IN

DOI:

https://doi.org/10.18311/jbc/2001/4134

Keywords:

Corcyra cephalonica, Egg Density, Parasitism, Systems, Trichogramma chilonis.

Abstract

Effeet of egg density of Corcyra cephalonica (Stainton) on parasitism and adult emergence in Trichogramma chilonis Ishii was investigated under two systems of rearing in the lahoratory. In nucleus culture maintenance system, 150 eggs/two females and under mass production system, 500 adults to 1 cc of eggs (about 15,000 eggs) were found most optimum for efficient utilization of eggs and females. The highly significant regression coefficients obtained for relation between egg density and number of egg parasitised, and per cent parasitisation and number of adults indicated the usefulness of prediction model.