Evaluation of Carica papaya leaf extracts for their efficacy on control of bacterial wilt of tomato caused by Ralstonia solanacearum

Management of bacterial wilt is very difficult as there are no efficient curative chemicals. Carica papaya leaf extract was evaluated their antimicrobial activity against Ralstonia solanacearum. The zone of inhibitions showed against ten R. solanacearum at range of 5.96mm to 15mm of different solvent extracts like aqueous, ethanol, ethyl acetate, hexane, and chloroform.

Int.J.Curr.Microbiol.App.Sci (2019) 8(3): 366-380 International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume Number 03 (2019) Journal homepage: http://www.ijcmas.com Original Research Article https://doi.org/10.20546/ijcmas.2019.803.046 Evaluation of Carica papaya Leaf Extracts for their Efficacy on Control of Bacterial Wilt of Tomato caused by Ralstonia solanacearum K Narasimha Murthy1, K Soumya3*, C Srinivas2 and S.R Niranjana1 Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore –570 006, Karnataka, India Department of Microbiology and Biotechnology, Jnanabharathi Campus, Bangalore University, Bangalore- 560 056, India Department of Microbiology, Field Marshal K M Cariappa College, A Constituent College of Mangalore University, Madikeri – 571201, Karnataka, India *Corresponding author ABSTRACT Keywords Carica papaya, Phytochemicals, Minimum inhibitory concentrations, Ralstonia solanacearum, Plant growth promotion, Tomato yield Article Info Accepted: 04 February 2019 Available Online: 10 March 2019 Management of bacterial wilt is very difficult as there are no efficient curative chemicals Carica papaya leaf extract was evaluated their antimicrobial activity against Ralstonia solanacearum The zone of inhibitions showed against ten R solanacearum at range of 5.96mm to 15mm of different solvent extracts like aqueous, ethanol, ethyl acetate, hexane, and chloroform The MIC of methanol at 512 μg/ml, ethanol at 2048 μg/ml, ethyl acetate at 1024 μg/ml, hexane at 1024 μg/ml, chloroform at 1024 μg/ml, aqueous at 2048 μg/ml and streptomycin at