MAHA SINGH JAGLAN, K.S. KHOKHAR, SUCHETA KHOKHAR AND RAM SINGH

Ovicidal property of some plant extracts was evaluated against Helicoverpa armigera (Hubner) under laboratory
conditions. Maximum egg mortality 59.2 and 61.4 per cent was observed with extract of neem (Azadirachta indica) seed kernel in methanol at 7.5 per cent concentration and chloroform:methanol (9:1) extract at 1.0 per cent concentration, respectively. Mortality of untreated eggs (without extract) was only 28.0 and 26.4 per cent, respectively. Melia azedarch drupes extract at 1.0 per cent concentration extracted in chloroform: methanol (9:1) exhibited 59.6 per cent egg mortality.Extracts from leaves of neem and M. azedarach had lower mortality of eggs as compared to fruits, but Lantana (Lantana
camara), Datura (Datura stramonium) and ak (Calotropis procera) leaves extract did not exhibit significant ovicidal
property as compared to control. Therefore, neem and M. azedarach could be considered as promising plants their ovicidal property against H. armigera.