Effect of adult diet and egg density on adult longevity, fecundity and sex ratio of Corcyra cephalonica (Stainton)
The experiment on the four different egg density of rice moth i.e. 375, 750, 1125 and 1500 eggs/225g of maize grains and different adult diets such as honey solution 10 and 5 per cent, sugar solution 10 and 5 per cent and water under laboratory condition showed the highest fecundity of 263.60 eggs/female and total number of eggs 51823.76 was observed with egg density 375 eggs/225 g grains and lowest fecundity of 145.03 eggs/female and total number of eggs 40390.85 with egg density of 1500 egg/225 g grains. All the fecundity value for different egg density were statistically different with each other but there was no significant difference in the fecundity of Corcyra cephalonica in all adult diets but were significantly higher than the control. The shortest adult male and female longevity of 6.30 days and 6.23 days respectively observed with egg density of 1500 eggs/225 g of grains which was at par with egg density of 1125 eggs/225 g grains with adult female longevity of 7.00 days. The longest adult male and female longevity of 9.53 days and 7.46 days was observed with egg density of 375 eggs/225g grains respectively. There was no effect of adult diets on male and female longevity of rice moth. The sex ratio (males to females) was highest (1:1.35) with egg density of 375 eggs/225 g grains while lowest (1: 1.12) with egg density of 1500 eggs/225 g grains.