In this research, anti- nematode activity of some native plants of Iran such as Castor bean,Chinaberry, Rapseed , Ricinus communis, Melia azedarach have been investigated aganist root knot nematode (Meloidogyne incognita ) in vitro conditions. The effect of alcoholic extract of leaf and seed oil of these plants with diferrent concentrations (0,50,100,200,300,400,500,1000pp) were studied. The percentage of immobility of second stage juveniles and hatching of eggs were evaluated.The results indicated all of plants had anti-nematode activity. overall alcoholic extractsand oil of Chinaberry and Castor bean had the most effect on immubility of second stage juveniles and unhatching of eggs of nematoda in vitro conditions and may have potential to be used as biological control agents to controlroot knot nematode .

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