Life Cycle and Population Growth Parameters of Cryptolaemus montrouzieri Mulsant (Col.: Coccinellidae) Reared on Planococcus citri (Risso) (Hem.: Pseudococcidae) on Coleus
Keywords:Cryptolaemus montrouzieri, Planococcus citri, Coleus, life cycle, population growth parameters
Life cycle parameters were estimated for development, longevity, fecundity and oviposition period, of the mealybug predator, Cryptolaemus montrouzieri Mulsant (Col.: Coccinellidae) fed on Planococcus citri (Risso) (Hem.: Pseudococcidae) reared on coleus plant, Solenostemon scutellarioides (L.) Codd.. All experiments were conducted in laboratory at temperature 27 Â± 1ÂºC , 65 Â± 5% RH and a photoperiod of 16:8 (L:D) hours. The incubation period, total larval period, pre-pupal and pupal period of C. montrouzieri were 3.945 Â± 0.047, 12.993 Â± 0.498, 2.432 Â± 0.071 and 7.791 Â± 0.103 days, respectively. The pre-oviposition, oviposition and post-oviposition period of C. montrozieri were 5.60 Â± 0.187, 70.375 Â± 2.920 and 2.875 Â± 0.360 days, respectively. Population growth parameters calculated from the data are: the intrinsic rate of increase (rm) = 0.092 Â± 0.002, the finite rate of increase (Î»), the net reproduction rate (R0), the mean generation time (T) and the doubling time (DT) of C. montrouzieri were, 1.097 Â± 0.002 dâ€“1, 125.339 Â± 5.136 females / female, 52.356 Â± 1.306 days and 7.511 Â± 0.161 days, respectively.
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