Biology, Age Specific Fecundity and Intrinsic Rate of Increase of Goniozus triangulifer Kieffer (Hymenoptera:Bethylidae), a Larval Parasitoid of Rice Leaffolder, Cnaphalocrocis medinalis (Guenee) (Lepidoptera:Pyralidae)


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 (Tc) of 14.61 days. The intrinsic rate of natural increase (rm) 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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