This work aims at disclosing the capability of Jojoba leaf extract to induce nematocide effect upon Meloidogyne incognita. To achieve such a purpose adventitious roots of Allium cepa were employed. Furadan as a well known nematocide was chosen and used for the comparison. Tomatto seedlings were treated with M. incognita and soil was treated either with Furadan or Jojoba leaf extract. Mitotic index and chromosomal abnormalities were estimated. The obtained results revealed that the Jojoba leaf extract was proven to be active as nematocide agent .