Egg Susceptibility of Brinjal Pest Leucinodes orbonalis Genue to Neem Extracts

The present study reports the bioefficacy of neem oil, neem cake extract and carbaryl at different concentrations on the eggs of Leucinodes orbonalis at two stages; after 0 to 24 and 24 to 48 hrs old eggs. Both neem oil and neem cake extract had ovicidal effect. Neem oil had higher ovicidal effect than neem cake extract and carbaryl. Egg mortality was found to be lesser on the eggs of older age. An increase in the concentration of test solutions resulted in an increase in the rate of mortality of eggs.