Life history and life table of Phytoseiulus persimilis
1968 - Volume: 10 Issue: 4 pages: 578-588
The life cycle of P. persimilis was determined under a diurnal temperature cycle of 58 to 83° F to be as follows: The adult female, after a preovipositional period of 3.0 days, laid an average of 2-4 eggs per day for 22.3 days. During the preovipositional and ovipositional periods the females consumed 7·3 and 14.3 eggs of T. urticae, respectively. After ceasing to oviposit the females lived an average of 7.1 days during which each consumed 3·9 eggs per day. The incubation time was 3.1 days. Both male and female larval stages lasted 1.0 day. The larvae did not feed. The male and female protonymphal stages lasted 1.7 and 1.6 days, respectively. During this time both males and females ate an average of 4-4 eggs of T. urticae. lfale and female deutonymphal stages lasted 1.7 days, during which time the deutonymphs ate 6.0 eggs. Total developmental time for males was 7·5 days and for females, 7.4 days. Each sex ate an average of 10.5 eggs during development. From the life history data, a life table was constructed. The intrinsic rate of increase was 0.219 individuals per female per day. The population multiplied 44-4 times in a generation time of 17.32 days. These statistics form one of the important components in an appraisal of the ability of this predator in the control of tetranychid prey.
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