Date Received: 05-01-2012 / Date Accepted: 18-04-2012 / Date Published: 13-06-2025
Biological characteristics of Coranus spiniscutis Reuter were examined at the Department for Experimental Entomology at Institute of Ecology and Biological Resources in Ha Noi, under laboratory conditions: temperature 26.1 - 30.8 0C and relative humidity 75.6 - 80.5 %. The preys were larval stages of Corcyra cephalonica belonging to the order Lepidoptera. Results showed that the total life cycle of C. spiniscutis is 47.86 ± 2.59 days, consisting of 8.19 ± 0.42 days egg period, 34.07±0.69 days of nymph stage and 5.6 ±0.28 days of oviposition period. The female of C. spiniscutis can lay from 72 to 110 eggs (average is 90.35 ±8.51 eggs) with the hatching rate of 85.43 ± 5.23%. At temperature of 300C and relative humidity of 75% the life cycle of C. spiniscutis was 45.07 ± 2.32 days, including 7.62 ± 0.31 days period, 32.95±0.59 days of nymph period and 4.5±0.22 days of egg laying. Both larvae and adults of C. spiniscutis had high capacity to consume the second to fifth instars of C. cephalonica . Daily consumption of a C. spiniscutis adult were 2.4±0.03 individuals of the first and second instars of Corcyra cephalonica, 3.5±0.16 individuals of the first and second instars Spodoptera litura, 2.4±0.15 individuals of the first and second instars of Plutella xylostella and 1.6±0.09 individuals of the first and second instars Hedylepta indicata.
