Abstract: Gompertz function was used to fit and analyze the body mass growth pattern of  Meriones unguiculatus born in the same spring in a field enclosure. The female and male M. unguiculatushad the similar growth rate Constant (k), which supported the earlier reports that the growth rate constant is species-specific and can reveal the inherent characteristics of species. However, the males had higher asymptotic mass and higher growth rate of body mass than the females, and the inflection time of body mass increase, the time of growth rate declining to the initial value, as well as the time achieving 90% of the asymptotic value of body mass were later for the males than for the females, illustrating that M. unguiculatus exhibited sexual dimorphism, with the females having relatively earlier time finishing their body mass development, an indicative of a polygamy mating strategy.

Key words: Cucumber powdery mildew, Silicon, Enzyme activity, AsA, GSH