Population growth potential of Bracon brevicornis Wesmael (Braconidae: Hymenoptera): A life table analysis

Srinivasan, T. and Chandrikamohan, (2017) Population growth potential of Bracon brevicornis Wesmael (Braconidae: Hymenoptera): A life table analysis. Acta Phytopathologica et Entomologica Hungarica, 52 (1). pp. 123-129. ISSN 0238-1249


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A laboratory experiment was conducted at the Biocontrol laboratory, Coconut Research Station, Aliyarnagar to study the life table parameters of Bracon brevicornis Wesmael, a parasitoid of the coconut blackheaded caterpillar, Opisina arenosella Walker on its established laboratory host, Corcyra cephalonica Stainton. Studies at 28.3±0.1 °C and 59.6±0.6% r.h. revealed that the net reproductive rate (R<sub>o</sub>) of B. brevicornis was 39.52 females/female when reared on C. cephalonica larvae. The precise generation time (T) was 13.33 days. The intrinsic rate of natural increase (r<sub>m</sub>) was 0.2758 which was slightly higher than the innate capacity for increase (r<sub>c</sub>=0.2504). The weekly multiplication rate was 6.893 numbers while 1561.83 females could be expected in the F<sub>2</sub> generation. Higher net reproductive rate, coupled with shorter population doubling time of B. brevicornis indicate the efficacy of the parasitoid as a suitable candidate for the management of coconut black headed caterpillar, O. arenosella, its intended host under field conditions.

Item Type: Article
Subjects: Q Science / természettudomány > QH Natural history / természetrajz > QH540 Ecology / ökológia
Q Science / természettudomány > QK Botany / növénytan > QK10 Plant physiology / növényélettan
Q Science / természettudomány > QL Zoology / állattan > QL01 Systematic zoology / állatrendszertan
Depositing User: Ágnes Sallai
Date Deposited: 13 Jul 2017 06:49
Last Modified: 30 Jun 2018 23:16

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