Life table of the green lacewing, Mallada boninensis on rice moth, Corcyra cephalonica
2015
Guntupalli, Sravanthi | Kalyanasundaram, M.
The survivorship from egg to adult emergence and fertility of Mallada boninensis (Okamato) fed on Corcyra cephalonica (Stainton) were studied in the laboratory and population parameters were used for construction of life table under ideal condition in laboratory free from natural enemies. Results of the age specific cohort life tables revealed that the highest mortality occurred in eggs (35.5%) followed by mortality in 2ⁿᵈ instar larva (16.2%) and in pupal stage (12.6%). The sex ratio (proportion of female to male) was 1: 1.25. The maximum life span of female was 35 days. The highest number of eggs produced per female was 6.05 at sixth day of oviposition. The net reproductive rate (Ro) was 2.31 females per female per generation. Mean generation time (T) was 32.3 days, while the intrinsic rate of natural increase (rₘ) was 1.0 female per female per day. The finite rate of increase (ë) was 1.02 females per female per day. The population double time (DT) was 12.02/day.
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