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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(2): 2690-2695
DOI: https://doi.org/10.20546/ijcmas.2019.802.314


Evaluation of Botanicals, Bio Agents and Fungicides against Stem Bleeding of Coconut caused by Thielviopsis paradoxa under in vitro Conditions
G.K. Sudarshan1*, G.S. Chandrashekara1, T.B. Basavaraju1, K.B. Palannaand G.P. Mutthuraju1
1University of Horticultural Sciences, Bagalkot-587104, Karnataka, India
2Department of Plant Pathology, GKVK, Bangalore-560065, Karnataka, India
*Corresponding author
Abstract:

Stem bleeding disease caused by Thielaviopsis paradoxa is one of the major diseases of coconut in almost all the coconut growing regions of Karnataaka. Bioefficacy of five botanicals viz. Allium sativa, Nerium olender, Tinospora cordifolia, Osimum sanctum and Aegle marmelos, Seven isolates namely Trichoderma viridae (GKVK), Trichoderma harzianum (GKVK), Trichoderma asperillum (GKVK), Trichoderma harzianum (HRS, NBAII, KRN and MYS) and ten systemic and three contact fungicides were evaluated under in vitro conditions against Thielviopsis paradoxa. Among the five botanicals evaluated only Allium sativa found significantly superior and showed complete inhibition of the growth of the pathogen at 15% and 20% concentration followed by Osimum sanctum found effective and has recorded eighty five per cent inhibition at 20% concentration. Among the antagonists tested Trichoderma viridae (GKVK) was found superior over all other bio agents by recording maximum inhibition of 78.00 per cent followed by Trichoderma asperillum (GKVK) which has recorded 74.00 per cent. Among the thirteen fungicides evaluated standard check Carbendazim 50%WP @ 0.1%, Difenoconazole 25%EC @ 0.1%, Propiconazole 25% EC@0.1%, Tebuconazole 25.9%EC @ 0.15% and Thiophanate Methyl 70%WP @ 0.28% has recorded cent per cent inhibition and showed superior over other fungicides .The Azoxystrobin 23%SC @ 0.1% and Pencycuron 22.9%SC @ 0.1% were recorded least per cent inhibition on 9 DAI.


Keywords: Coconut, Fungicides, Stem bleeding, Thielviopsis paradoxa, Plant extracts, Bio agents
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How to cite this article:

Sudarshan, G.K., G.S. Chandrashekara, T.B. Basavaraju, K.B. Palanna and G.P. Mutthuraju. 2019. Evaluation of Botanicals, Bio Agents and Fungicides against Stem Bleeding of Coconut caused by Thielviopsis Paradoxa under Invitro Conditions.Int.J.Curr.Microbiol.App.Sci. 8(2): 2690-2695. doi: https://doi.org/10.20546/ijcmas.2019.802.314