eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2015-02-15 2 1 61 66 607 article Varaprasad Bobbarala 1 G. Srinivasa Rao 1 D. Aryamithra K. Chandrasekhar Naidu 2 G. Seshagiri Rao 3 For U Biosciences, A/4A, Park lane Residency, East point colony, Visakhapatnam - 530 017 (India). Department of Botany, College of Science and Technology, Andhra University Visakhapatnam - 03 (India). Department of Biochemistry, College of Science and Technology, Andhra University Visakhapatnam - 03 (India). In this current investigation biocontrol of bacterial pathogen was achieved by methanolic extracts of fifty different medicinal plant extracts via agar well diffusion method. Concerning bacterial pathogens affecting sorghum plants, Pseudomonas syringe causal agent of seedling diseases of sorghum, is one of the most spread, in greenhouse and in open field sorghum crops in the world. Natural extracts with microbicidal activity of fifty different medicinal plants were studied to improve crop development. The inhibitory effects of methanol extracts of these plants with different MICs were tested against bacterial phytopathogen, P. syringe. It is gram negative rod shaped bacteria belonging to the family Pseudomonadaceae. It causes seedling diseases, bacterial blight of lilac; tomato speck disease and bacterial canker of cherry etc, the antimicrobial activities of the methanol extracts of most of the medicinal plants have demonstrated the inhibition effects on P. syringe. Except the following four plants such as R. communes, T. pumila, T. tinctoria and T. procumbens were not exhibited antimicrobial activity against P. syringe. Among the selected fifty plants 92% of plants given remarkable bioactivity where as only the 08% of plants did not give antimicrobial activity against P. syringe. https://biomedpharmajournal.org/vol2no1/bactericidal-activities-of-fifty-medicinal-plants-methanolic-extracts-against-pseudomonas-syringae-pv-syringae/ Pseudomonas syringe Methanolic extracts Bactericidal activity