Lettuce (Lactuca sativa) incorporation into soil, was investigated as an allelopathic control method against root and stem rot
disease of cucumber (Cucumis sativus), caused by Fusarium oxysporumf. sp. radicis-cucumerinum. In pathogen-inoculated soils,
lettuce incorporation significantlydecreased disease incidence while increasing total cucumber yield, up through the fourth month of
the season. Non-inoculated soils sustained, in all cases, higher cucumber yields irrespective of lettuce addition. Our results showed
that lettuce incorporation into soil could be combined with other control methods against root and stem rot of cucumber in an
integrated disease management system.