The control of Meloidogyne incognita on tomato by four nematicides. Four locally available chemicals were tested for nematicidal action on root-knot Meloidogne incognita Chitwood eggs and second stage larvae on tomato using several rates including manufacturer's recommended rate. Varying methods of evaluation were utilized: water screen, soil screen, biological assay using sandy loam soil and pure sand as soil medium, and greenhouse pot tests with the same plant parasite.