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Pakistan Journal of Biological Sciences

Year: 2000 | Volume: 3 | Issue: 12 | Page No.: 2106-2108
DOI: 10.3923/pjbs.2000.2106.2108
Life Table Studies of Trichogrammatoidea bactrae, Hymenoptera: Trichogrammatidae, an Effective Biological Agent of Pink Bollworm (Pectinophora Gossypiella Lepidoptera: Gelechidae) of Cotton (Gossypium spp.)
Muhammad Faheem Malik

Abstract: Selected laboratory life table studies of Trichgrammatoidea bactrea were made at New Maxico State University USA. Life history studies were run at 13, 18, 23 and 28 °C at a constant 55% relative humidity (RH) and a 11/13 (light/dark) photoperiod. Speed of development from egg to adult stage ranged from 50.31 to 8.72 days at temperature from 13 to 28 °C respectively. Immature mortality was highest (32.01%) at 28 °C and lowest (16.79%) 18 °C. More female than males were found at all temperatures. Female fecundity related directly to temperatures. There were 24 eggs per female at 28 °C and 12 eggs per female at 13 °C. Females lived longer than males at all temperatures. Net productive rate was maximum at 23 °C (10.629) and minimum at 13 °C (4.751). In trinsic rate of increase and finite rate were maximum at 28 °C (0.231 and 1.261 respectively) and minimum at 13 °C (0.029 and 1.030 respectively).

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How to cite this article
Muhammad Faheem Malik , 2000. Life Table Studies of Trichogrammatoidea bactrae, Hymenoptera: Trichogrammatidae, an Effective Biological Agent of Pink Bollworm (Pectinophora Gossypiella Lepidoptera: Gelechidae) of Cotton (Gossypium spp.). Pakistan Journal of Biological Sciences, 3: 2106-2108.

Keywords: Trchogrammatoidea bactrae parasitoid life table speed of development mortality, fecundity net teporoductive rate and intrinsic rate of increase

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