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The effect of three host plants, sweet pepper, cucumber and eggplant, on the survival and fecundity of  Myzus persicae  (Sulzer) (Hem.: Aphididae) and population growth parameters of  Aphidius platensis  as a solitary endoparasitoid of green peach aphid were studied. The raw data were analysed using the age-stage, two-sex life table theory. The results showed that sweet pepper is the most suitable host plant for green peach aphid development and reproduction. The intrinsic rates of increase ( r ) of  M. persicae  reared on eggplant, sweet pepper and cucumber were 0.32 ± 0.01, 0.33 ± 0.01 and – 0.071 ± 0.06 d −1,  respectively. Furthermore, other population parameters of aphids raised on sweet pepper and eggplant were significantly higher than corresponding parameter values of aphids fed on cucumber plant. The intrinsic rate of increase ( r ) of  A. platensis  reared on sweet pepper was 0.29 ± 0.01 d −1 . The life expectancy ( e xj) of  A. platensis  parasitised pepper raised green peach aphids was 21.08 days on the first day of emergence, and the maximum reproductive value of  A. platensis  females occurred on the 14th day. Our results showed that sweet pepper could serve as a suitable host plant for rearing  M. persicae  as a host for  A. platensis  within a biological control programme context according to the pre-adult period, survival, adult longevity and fecundity of  M. persicae . This information could be useful for mass rearing of  A. platensis  in insectariums where the faster growth and development of aphids are desirable.

biocontrol science and technology

How host plants influence the life history and population growth of  Myzus persicae  (Hemiptera: Aphididae) and its parasitoid,  Aphidius platensis  (Hymenoptera: Braconidae)