Abstract: Laboratory experiment was conducted in Microbiology Laboratory of School of Science and Science Technology, Abubakar Tafawa Balewa University, Bauchi, Nigeria, to determine the antifugal effect of some plant extracts at different concentration to control tomato fruit rot via both invitro and invivo approaches. The aqueous moringa, Lantana, garlic and pawpaw each with two varying concentrations (40 and 60g/l) were evaluated along with carbendazin for comparison and untreated tomatoes serving as control against Aspergillus flavus. The treatments were laid in a Completely Randomized Design (CRD) with three replications. The results showed a promising antifungal activity of the crude extracts of these plants against A. flavous. Among the various plant extracts with varying concentrations, aqueous extracts of pawpaw (40 and 60g/l) was found to have more significance (P< 0.01) inhibitory effect on radial growth of A. flavus both invitro (0.30 and 0.24cm and invivo 0.77 and 0.71) better than other extracts and is comparable to carbendazim. On the other hand, lantana, garlic and moringa at 40 and 60g/l reduced radial growth of A. flavus better than the control. This finding proved the potentiality of plant extracts for the control of post harvest and transit fungal rot of tomato fruit and could be applied to control fungal fruit rot of tomato in both storage and on transit.