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The development and life table parameters of Planococcus citri (Risso) were investigated at various temperatures ranging from 20 to 30 oC. The total duration of development of female mealybug was 28.2 day at 20 oC, 20.8 day at 25 oC, and 20.05 day at 30oC. The total life cycles of P. citri females were 63.20, 51.10, and 41.55 days at 20, 25, and 30oC, respectively. The highest number of egg laying by female of P. citri was recorded at 30 ̊C with an average of 340.1 eggs, while the average numbers of egg laying were 62.1 and 276.8 eggs per female at 20, and 25 ̊C, respectively. The total life cycles of P. citri males were 43.2, 30.4, and 23.95 days at 20, 25, and 30oC, respectively. The total number of daughters per female (Ro) obtained at 20oC was 62.61 compared with 136.88, 380.00 and 339.62 daughters at 25, 27 and 30 oC, respectively. The generation time (Gt) values of P. citri were 64.45, 50, 46.35 and 44.88 day for insect reared at 20, 25, 27 and 30oC, respectively. While intrinsic rate of natural increase (rm) values were 0.064, 0.09, 0.128 and 0.129 for insect reared at 20, 25, 27 and 30 oC, respectively. The values of total days for population to double (Dt) decreased gradually with increasing degree of temperature. These findings showed citrus mealybug performances to be highly affected by temperature.

Laboratory Studies on the Development and Life Table Parameters of Planococcus citri (Risso) (Hemiptera, Pseudococcidae) at Different Temperatures