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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(3): 366-380
DOI: 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
1Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore –570 006, Karnataka, India
2Department of Microbiology and Biotechnology, Jnanabharathi Campus, Bangalore University, Bangalore- 560 056, India
3Department of Microbiology, Field Marshal K. M. Cariappa College, A Constituent College of Mangalore University, Madikeri – 571201, Karnataka, India
*Corresponding author
Abstract:

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 <8 μg/ml. The seed treatment with C. papaya leaf extracts increased the seed germination and vigor index (1218.61) when compared to control (1152.69). Under greenhouse conditions plants treatments with C. papaya extracts were increased plant growth and decreased wilt incidence about 42.29-52.14%. In field study the reduction of wilt by C. papaya leaf extracts at 100mg/ml concentration. C. papaya leaf extracts increased the yield by 15.08% (1.3t/ha) and decreased the wilt incidence by 52.14%.


Keywords: Carica papaya, Phytochemicals, Minimum inhibitory concentrations, Ralstonia solanacearum, Plant growth promotion, Tomato yield
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How to cite this article:

Carica papaya, Phytochemicals, Minimum inhibitory concentrations, Ralstonia solanacearum, Plant growth promotion, Tomato yieldInt.J.Curr.Microbiol.App.Sci. 8(3): 366-380. doi: https://doi.org/10.20546/ijcmas.2019.803.046