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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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(12): 2277-2292
DOI: https://doi.org/10.20546/ijcmas.2019.812.270


Biological Control of Damping Off of Okra caused by Rhizoctonia solani
Jaina V. Patel*, Amar Singh, Khushwinder Kaur, Divya Bhandhari and D. K. Banyal
Department of Plant Pathology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur- 176 062, Himachal Pradesh, India
*Corresponding author
Abstract:

Damping off of okra is known to occur worldwide and caused by different pathogens under variable climatic conditions.. In Himachal Pradesh Rhizoctonia solani was found major associated pathogen with damping off of okra in summer season grown crop. Twenty isolates of Trichoderma spp. isolated from different rhizosphere soil and five standard isolates of Trichoderma spp. already available were evaluated for their antagonistic activity in vitro against R. solani. Among all the isolates tested, Trichoderma sp. -2 was found best bioagents for inhibiting mycelial growth of R. solani (67.8%) in dual culture followed by Trichoderma sp.-9 (67.0%), Trichoderma sp. -6 (64.8%) and Trichoderma sp. -11(61.9%). Significantly, maximum mycelial growth inhibition (42.4%) of pathogen was with volatile compounds activity of Trichoderma sp.-2 while, filter sterilized culture filtrate of Trichoderma sp. -6 showed maximum pathogen mycelial inhibition. On the basis of morpho-cultural characteristics the potential bioagent isolates, Trichoderma sp.-6 and Trichoderma sp.-9 were identified as T. harzianum and T. viride, respectively. In mycoparasitic interaction, bioagents hyphae coiled around R. solani mycelium and after penetration lysed the pathogen hyphae. Under net house conditions, seed biopriming application method of bioagents was found superior for management of damping off of okra caused by R. solani than soil application, seed treatment and drenching.


Keywords: Okra, Damping off, Rhizoctonia solani, Biological control agent
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How to cite this article:

Jaina V. Patel, Amar Singh, Khushwinder Kaur, Divya Bhandhari and Banyal, D. K. 2019. Biological Control of Damping Off of Okra caused by Rhizoctonia solani.Int.J.Curr.Microbiol.App.Sci. 8(12): 2277-2292. doi: https://doi.org/10.20546/ijcmas.2019.812.270