B. K. Mishra ¹, B. Senapati ¹

Affiliations
1 Department of Entomology, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar 751 003, IN

Abstract

The egg-larval and pupal periods of Apanteles cypris Nixon (Hymenoptera: Braconidae), a larval parasitoid of Cnaphalocrocis medina lis (Guenee) were 0.90±0.72 and 3.70±0.73 days, respectively. Longevity of male and female were 4.1±0.71 and 3.95±0.82 days, respectively. Male:female ratio was 1: 1.8. Life table data of the parasitoid indicated that the ovipositing females lived for maximum six days and they increased their population at the rate of 30.97 per generation (R_o) with mean generation time(T_c) of 14.01 days. The intrinsic rate of natural increase (r_m) was 0.249 and the finite rate of increase (λ) was 1.282 females/female/day.

Keywords

Apanteles cypris, Biology, Life Table, Intrinsic Rate of Increase, Cnaphalocrocis medinalis.

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B. K. Mishra ¹, B. Senapati ¹

Affiliations
1 Department of Entomology, Orissa University of Agriculture and Technology, Bhubaneswar 751 003, IN

Abstract

Biology of Goniozus triangulifer Kieffer (Hymenoptera : Bethylidae) on Cnaphalocrocis medinalis (Guenee) revealed the egg-larval period to be 9.05±1.14 days, pupal period 3.65±0.48 days and adult longevity 8.30±1.26 days for males and 11.10±1.77 days for females. Sex ratio was 1:4.30 (M:F). Life table data of the parasitoid indicated that the ovipositing females lived for a maximum of 9 days and increased its population at the rate of 16.40 per generation (R₀) with mean generation time (T_c) of 14.61 days. The intrinsic rate of natural increase (r_m) was 0.193 and the finite rate of increase (λ) was 1.212 females/female/day.

Keywords

Age Specific Fecundity, Biology, Cnaphalocrocis medinalis, Goniozus triangulifer, Intrinsic Rate of Increase.

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