A study on the life cycle of Cryptolaemus montrouzieri Mulsant (Col., Coccinellidae) in laboratory conditions
2010
Keshtkar, M. | Goldasteh, Sh. | Rafiei-Karahroodi, Z. | Bagherzadeh, Z.
Cryptolaemus montrouzieri Mulsant (Col., Coccinellidae) is a polyphage species, and it is one of the most important natural enemy of crab louse, the Mealy bug, especially coastal Pseudococcus maritimus Ehrhorn. The different growth stages are fed on Pseudococcus maritimus. This study was to determine the duration of different stages of life Coccinellidae. Evaluate life cycle Coccinellidae 100 eggs in 8 cm Petri dishes in the laboratory and controlled conditions (constant temperature 25 ± 2 degrees Celsius, light period 16 hours light and 8 hours darkness and 70 ± 5 percent relative humidity) in incubators was reared. The results showed that the fetal period, larvae age one, two, three, four, and pupation, female Coccinellid were respectively 6.97 ± 0.0303, 3.97 ± 0.0303, 3.06 ± 0.042, 3.88 ± 0.058, 3.79 ± 0.0723, 9.09 ± 0.042 day. the total life stages Coccinellidae from eggs to complete emergence of insects were 30.76 ± 0.123 days. Average Life longevity was 41.24 ± 1.93. Net reproductive rate and the average eggs per day were, 449.482 ± 0.99 eggs and 11.82, respectively. Net reproductive rate (R0) was 336.666 ± 0.740, female / female / generation. Intrinsic rate of population increase (rm) was 0.13 number of female offsprings per female. Finite rate of population increase (ë) was 1.14. Average time of a generation (T) and. Population doubling time (DT), were 44.97 and 5.36 days, respectively.
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