eng International Academy of Ecology and Environmental Sciences Arthropods 2224-4255 2015-9-1 4 3 78 89 2 article Negar Saeedi 1 2 Mohammad Reza Damavandian 1 2 Hemmat Dadpour Moghanloo 1 2 Department of Plant Protection, College of Cultural Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Biological Control Research Laboratory, Amol, Iran The effect of temperature on the development, survival, fecundity and population growth parameters of Cryptolaemus montrouzieri Mulsant (Col.: Coccinellidae) reared on Planococcus citri Risso (Hom.: Pseudococcidae) was determined at five constant temperatures (18, 22, 26, 30 and 32+-1 cel. degree) in the laboratory conditions. Results showed a temperature - dependent development of the coccinellid. The mean total of immature period was estimated 76.6+-0.9, 33.9+-0.1, 25.8+-0.1, 22.6+-0.1 and 26.2+-1.4 days at 18, 22, 26, 30 and 32 cel degree, respectively. The highest and lowest values of R0, rm and Lamda were obtained 369.9+-50.2 and 2.5+-0.8 (female/female/generation), 0.07+-0.01 and 0.02+-0.01 (female/female/day) and 1.08+-0.01 and 1.02+-0.01 (day-1) at 26 and 32 cel. degree, respectively. The lowest values of generation time (T) and doubling time (Dt) were calculated 42.2+-0.9 and 8.9+-0.5 days at 32 and 26 cel. degree, respectively. The lower and higher developmental threshold of total of immature period were obtained 11.5 and 25.5 cel. degree, respectively. The thermal requirement for completion of total of immature period of this predator were estimated 400 DD. These results showed that 26 degree and/or adjacent temperature is most suitable for mass rearing of this predator. http://www.iaees.org/publications/journals/arthropods/articles/2015-4(3)/effects-of-temperature-on-population-growth-parameters.pdf development life table Cryptolaemus montrouzieri degree day