Influence of constant temperatures on development, reproduction and life table parameters of Encarsia inaron (Hymenoptera: Aphelinidae) parasitizing Neomaskellia andropogonis (Hemiptera: Aleyrodidae).

摘要

The Life history and life table parameters of the parasitoid Encarsia inaron (Walker) parasitizing Neomaskellia andropogonis Corbett were studied at 20, 25, 30 and 32 degrees C. Egg-to-adult development time of females ranged from 31.7 days at 20 degrees C to 15.0 days at 30 degrees C. An average of 305.4 degree-days was required to complete development above the lower threshold temperature (10.8 degrees C). Pre-adult survivorship was 80.8, 86.6, 72.5 and 64.4% at 20, 25, 30 and 32 degrees C, respectively. Mean longevity of adult females E. inaron ranged from 22.3 days at 20 degrees C to 4.5 days at 32 degrees C. Mean total fecundity ranged from 12 to 74 eggs/female. The sex ratio (female %) ranged from 54 to 82%. The intrinsic rate of population increase (r_m) at the different temperatures ranged from 0.113 to 0.203 females/female/day, with the highest value recorded at 25 degrees C. These data have implications for commercial rearing of E. inaron as well as for understanding its performance when used for the management of N. andropogonis.Digital Object Identifier http://dx.doi.org/10.1016/j.cropro.2011.12.006