Arun Baitha ¹, Ashok Varma ¹

Affiliations
1 Division of Crop Protection Indian Institute of Sugarcane Research Rae Bareli Road, Dilkusha P.O., Lucknow 226002, Uttar Pradesh, IN

Abstract

Growth rate of Trichogramma chilonis Ishii (Sugarcane strain) was carried out on eggs of Corcyra cephalonica. Net reproductive rate (R_o) was found to be 42.99, while the mean duration of a generation was 10.52 days. The intrinsic rate of natural increase (r_m) was found to be 0.3619. The finite rate of increase (1) was 1.436 per female per day.

Keywords

Growth Rate, Life Table, Population, Sugarcane, Trichogramma chilonis.

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Arun Baitha ¹, S. K. Jalali ², R. J. Rabindra ², T. Venkatesan ², N. S. Rao ²

Affiliations
1 Division of Crop protection, Indian Institute of Sugarcane Research, Rae Bareli Road, Dilkusha, P.O., Lucknow 226 002, UP, IN
2 Project Directorate of Biological Control (ICAR), Post Bag NO.2491, H. A. Farm Post, Hebbal, Bellary Road, Bangalore 560 024, Karnataka, IN

Abstract

Pupae of Chilo partellus (Swinhoe) were exposed to one-day-old mated females of Tetrastichus howard(OlIifO) for different periods to determine optimum period of exposure for laboratory production. The percentage parasitism varied significantly from 20 to 80 with different exposure periods. The number of parasitoids obtained per pupa (138.0) and females (71 %) were significantly higher when pupae were exposure for 12 hours and it decreased significantly on increasing exposure period. Though the per cent parasitism was vlry low when the pupae were exposed for 12 hours, the number of parasitoids obtained/ 100 pupae was highest (2760). However, considering progeny production and per cent females obtained, 12 hours exposure period is most suitable for avoiding superparasitism in the lahoratory production of the parasitoid.

Keywords

Chilo partellus, Exposure Period, Superparasitism, Tetrastichus howardi.

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