Biopesticidal and Larvicidal Effects of Chukrasia tabularis A Juss Extracts on Third Instar Larva of Helicoverpa armigera

Chukrasia tabularis A.Juss plant belongs to Meliaceae family. Limonoids are such compounds abundantly present in C.tabularis and being tetranotriterpenoid in nature .The present paper deals with biopesticidal effect of C.tabularis seed oil and seed various extract on Helicoverpa armigera. Highest mean percent reduction over control was highest with methanol (43.07 to 85.94%), followed by ethanol (41.15 to 68.85%) and petroleum ether (39.18 to 66.14%) at all the three concentrations tested. Among the different concentrations tested, mean percent reduction in population over control increased as the concentration of the extracts increased with maximum reduction at 500 ppm. For seed oil methanol at 500 ppm (85.9%) followed by ethanol (68.85%) and petroleum ether (66.14%) recorded highest percent reduction over control, aqueous extract and benzene at 125 ppm found least effective, however effectiveness increased at 500 ppm.