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1 July 2015 Assessing Compatibility of the Predatory Mite Typhlodromus bagdasarjani (Acari: Phytoseiidae) and Resistant Eggplant Cultivar in a Tritrophic System
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Abstract

The fitness and population dynamics of predators depend on the quality of host plants consumed by their prey. In this study, age-stage, two-sex life table parameters and predation rate of Typhlodromus bagdasarjani Wainstein & Arutunjan were determined on two-spotted spider mite reared on susceptible (‘Isfahan’) and resistant (‘Neishabour’) eggplant cultivars under laboratory conditions at 25 ± 1°C, 60 ± 5% relative humidity, and a photoperiod of 16:8 (L:D) h. The means, variances, and standard errors of the life table and predation parameters were estimated using the bootstrap resampling procedure. The value of the intrinsic rate of increase (r) of this predator on the susceptible eggplant cultivar (0.1538 d-1) was significantly higher than that on the resistant one (0.1175 d-1). The value of the net reproductive rate (R0) on the susceptible and resistant eggplant cultivars was 7.55 and 8.21 offspring, respectively. In addition, the mean generation time (T) was 12.97 and 17.75 d, respectively. The age-stage-specific predation rate (cxj) of all stages of the predator on the resistant eggplant cultivar was higher than that on the susceptible one. In addition, the value of net predation rate (Co) on the susceptible and resistant eggplant cultivars was 193.05 and 221.44 preys per predator, respectively. In addition, the value of finite predation rate (ω;) on the resistant cultivar (7.005 preys per predator per day) was significantly higher than that on the susceptible one (6.361 preys per predator per day). In conclusion, due to higher finite predation rate on the resistant eggplant cultivar, the performance of the predator on this cultivar was more than that on the susceptible one.

© The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
Mostafa Khanamani, Yaghoub Fathipour, and Hamidreza Hajiqanbar "Assessing Compatibility of the Predatory Mite Typhlodromus bagdasarjani (Acari: Phytoseiidae) and Resistant Eggplant Cultivar in a Tritrophic System," Annals of the Entomological Society of America 108(4), 501-512, (1 July 2015). https://doi.org/10.1093/aesa/sav032
Received: 7 December 2014; Accepted: 30 March 2015; Published: 1 July 2015
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