National Academy of Agricultural Sciences (NAAS)
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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 2018: 95.39 NAAS RATING 2020: 5.38 |
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.
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