Abstract
Leaf extracts from Azadirachta indica (A. Juss), Withania somnifera (L.) and Eucalyptus citriodora (Hook) were tested for their nematicidal effect on the growth and yield of maize (Zea mays) in microplots at CDRI, PARC, Karachi. Preplantation soil samples were collected and nematodes were identified, Initial mean population 100 ml! of soil extract was calculated. After 12 weeks, nematode population was suppressed i.e. 41.00% in the plants treated with Azadirachta indica, 28.2BtPt) in Withania somnifera and 42.10% in Eucalyptus citriodora. Weight of roots and shoots was maximum (47 and 187g) in the plants treated with ncem extract compared with control (37 and 127g).
