Thirty seven plants samples of thirty plants were bio-assessed by agar diffusion methods against Rathyibacter tritici, a causal organism of tundu disease of wheat. The fruit extracts of Terminalia chebula has shown marvellous inhibitory activity against Rathyibacter tritici, a causal organism of tundu disease of wheat. The various parts of Terminalia belerica (bark, fruit, leaf and stem) have shown more or less equal inhibitory effect against the test bacterium. The combined extracts of bark of Terminalia belerica and fruit extracts of Terminalia chebula in general showed a strong enhancement in activities over the individual extracts of bark extracts of Terminalia belerica and fruit extracts of Terminalia chebula against the bacterium growth respectively. Some of the other plants such as Acacia arabicae, Caesalpinia bonducella, Rosa damascena and Terminalia arjuna also showed the inhibitory effect against the test bacteria.