Development of Different Larval Instars of Green Lacewings, Chrysoperla carnea (Stephens) on Different Hosts

Effect of different host on the development of different larval instars of Chrysoperla carnea (Stephens) was studied on eggs of C. cephalonica, brinjal aphid (M. persicae) and mango mealy bug (D. mangiferae) in the laboratory of biological control, BHU, Varanasi during the year 2011. The experimental finding reported the larval duration of 1st, 2nd and 3rd instar of C. carnea was 3.20, 3.83 and 3.25 days for the completion of the development on Corcyra eggs, respectively. The difference observed in duration of different instars may be due to the difference in conditions of experimentation. Similarly the larval duration of 1st, 2nd and 3rd instar of C. carnea was observed 3.78, 4.92 and 4.29 days on brinjal aphid (D. mangiferae) respectively. Under present investigation the total larval duration of C. carnea on C.cephalonica was recorded as 10.28 days. Percentage of larvae complete their development was higher for all the three instars of C. carnea is 96.30, 95.80 and 93 percent, respectively when fed on C. cephalonica eggs than 93.52, 91.50 and 87.50 on brinjal aphid and 91.60, 89.40 and 86.40 per cent respectively on mango mealy bug.