Although, various weed control methods have been developed, weeds pose a permanent threat to the crop production. Field experiments were conducted in Research Station of Ferdowsi University of Mashhad, Iran, during 2004 and 2005. Treatments were two tillage systems (reduced and conventional) and six weed management methods (herbicide, rotary cultivator, handweeding, herbicide plus rotary cultivator, herbicide plus handweeding and handweeding plus rotary cultivator). The herbicide (Metribuzin), handweeding and rotary cultivator treatments were applied 2, 3, and 6 weeks after transplanting, respectively. The highest and lowest tomato yields were obtained in herbicide plus rotary cultivator and rotary cultivator, respectively. Density and biomass of broadleaf weeds was affected by different weed management strategies. They were controlled by handweeding and its integration with herbicide better than other methods. Different weed management methods showed no significant effect on grass weed density, but their biomass was affected at the end of growing season. Handweeding treatment and its integration with herbicide have also controlled grass weeds better than other treatments.

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