Effect of fungus, Lecanicillium longisporum (Hypocreales: Clavicipitaceae) on life table parameters of Encarsia formosa (Hymenoptera: Aphelinidae)

Document Type : Research Paper

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Abstract

Effects of fungus, Lecanicillium longisporum was studied on reproductive capacity of Encarsia formosa at laboratory conditions. Fungal infection on whiteflies was carried out using 9.5×105 conidia/ml of fungus on the third instar of whitefly exposing to parasitoid at four different time intervals; 0, 24, 48 and 72 hours post-inoculation. Longevity, pre-oviposition period, oviposition period and other parameters were evaluated and compared. Results showed that the intrinsic rate of increase (rm) for control was 0.203 day -1. There was a significant decreasing trend on the intrinsic rate of population decrease at different time intervals. Other life table parameters consist of net reproductive ratio (R0), gross reproductive rate (GRR), cohort generation time (T), and finite rate of increase (λ) for control were 41.75, 43.42, 18.32 and 1.22, respectively. The results indicated that infected hosts caused decreased reproductive potential of parasitoids.

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Plant Pest Research
Volume 2, Issue 2 - Serial Number 2
September 2012
Pages 1-11

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  • Receive Date: 07 July 2015
  • Accept Date: 07 July 2015

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