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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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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 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

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 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(2): 2192-2202
DOI: https://doi.org/10.20546/ijcmas.2020.902.247


Studies on in vitro Antagonism of Native Biocontrol Agents on Coconut Stem Bleeding and Bud Rot Disease Pathogens
K. Aruna1 and Kalpana Motha2*
1Department of Microbiology, A.S.D Govt. Degree College for Women, Kakinada- 533101, Andhra Pradesh, India
2Horticultural Research Station, Dr.YSR Horticultural University, Vijayarai-533475, Andhra Pradesh, India
*Corresponding author
Abstract:

In vitro antagonism of native biocontrol agents on coconut pathogens revealed that all the three isolated native Trichoderma spp were found inhibitory to the mycelia growth of Thielaviopsis paradoxa and Phytophthora palmivora. Maximum percent inhibition of mycelia growth of Thielaviopsis paradoxa and Phytophthora palmivora was obtained by Trichoderma viride followed by Trichoderma hamatum and Trichoderma harzianum. Pseudomonas fluorescens fared well against the coconut pathogens with the percent inhibition of mycelial growth of pathogen to an extent of 68.32 to 69.38%. Volatile metabolites of Trichoderma spp suppressed the mycelia growth of Thielaviopsis paradoxa and Phytophthora palmivora. In case of non volatile metabolites, significant inhibition of mycelia growth of test pathogens was noticed with Trichoderma spp at 100% concentration. Studies on the production of volatile and non volatile metabolites of Pseudomonas fluorescens against coconut pathogens revealed that the test pathogens Thielaviopsis paradoxa and Phytophthora palmivora were inhibited significantly. These in vitro studies offers scope for effective management of disease at field level.


Keywords: In vitro antagonism, Trichoderma spp, Pseudomonas fluorescens, Coconut pathogens
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How to cite this article:

Aruna, K. and Kalpana Motha. 2020. Studies on in vitro Antagonism of Native Biocontrol Agents on Coconut Stem Bleeding and Bud Rot Disease Pathogens.Int.J.Curr.Microbiol.App.Sci. 9(2): 2192-2202. doi: https://doi.org/10.20546/ijcmas.2020.902.247