Bionomics of Chrysoperla carnea (Stephens) on eggs of Corcyra cephalonica (Stainton)

The present study entitled ‘Bionomics of Chrysoperla carnea (Stephens) on eggs of Corcyra cephalonica (Stainton)’ was conducted in the laboratory at 26.5°C temperature and 65.5 per cent RH at the College of Agriculture, Nagpur during the year 2012–13. Biology of C carnea on Corcyra eggs was studied in laboratory and the observations were recorded on the parameters viz incubation period, 1^st, 2^nd and 3^rd instars, total larval duration, pupal duration, total development period (egg to adult), sex ratio (M:F) pre-oviposition, oviposition, fecundity, post-oviposition period, adult longevity (male and female) were recorded as 3.23, 3.15, 2.08, 3.51, 8.43, 20.62, 1:1.5, 3.97, 32.11, 268.66 (number eggs/female), 2.81, 29.7 and 38.23 days respectively. The average hatching percentage of eggs of C carnea was recorded as 86.2 on Corcyra eggs. The average length and width of different stages of C carnea viz egg, 1^st, 2^nd and 3rd instar, male and female were recorded as 0.86, 3.70 (pedicel), 2.65, 5.25, 7.19, 3.87 (pupal diameter), 7.77 and 8.38 mm respectively and 0.35, 0.59, 1.22, 2.28, 1.16 and 1.63 mm respectively.