Effects of aqueous extract of walnut leaves against Meloidogyne javanicaon tomato plan
reenhouse and laboratory studies were conducted to test the efficacy of walnut aqueous extract against Meloidogyne javanicaon tomato plant. Aqueous extract of walnut leaves were prepared with various concentrations rang (5%, 10% and 20%) that they were diluted from stock solution and water were used as control. Tomato seedling roots were soaked for one hour in the mentioned concentrations, then tomato plants were transplanted to the pots and 20 cc of walnut extract injected to the soil. One day later, second stag juveniles (J2s) of nematode were incubated around the tomato roots.