Bio-efficacy of Solvent Extracts of Botanicals against Brinjal Shoot and Fruit Borer, Leucinodes orbonalis (Guenee) under in vitro Condition
A. Thasneem
Department of Entomology, Faculty of Agriculture, Annamalai University, Annamalai Nagar-608 002, Tamil Nadu, India.
M. Pazhanisamy *
Department of Entomology, Faculty of Agriculture, Annamalai University, Annamalai Nagar-608 002, Tamil Nadu, India.
*Author to whom correspondence should be addressed.
Abstract
This study evaluated the effectiveness of solvent extracts of A. indica, C. inerme, and O. sanctum against Leucinodes orbonalis, a borer of brinjal shoots and fruit. The room temperature solvent extraction method was used to get the acetone, petroleum ether, and methanol extracts of the botanicals, A. indica 100% (76.54%) methanol extract had the highest antifeedant efficacy. The acetone and petroleum ether extracts of A. indica 100% (65.45%; 60.42%) and C. inerme 100% (57.25%; 51.78%) were also effective antifeedants. The per cent larval mortality of L. orbonalis was highest in the methanol, acetone and petroleum ether extracts of A. indica 100% (89.33%; 80%; 71.33%), A. indica 75% (76.67%; 70%; 67%) and A. indica 50% (68.67%; 63.67%;58.67%), respectively.
Keywords: Bio-efficacy, solvent extracts of botanicals, antifeedant activity, Leucinodes orbonalis, in vitro