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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 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
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(10): 1484-1493
DOI: https://doi.org/10.20546/ijcmas.2020.910.177


Field Evaluation of Fungicides, Sea Weed Biomolecules and Screening of Available Varieties/ Hybrids against Early Blight of Tomato caused by Alternaria solani
K. Sudarshan1*, M. S. Nagaraj1, M. K. Prasanna Kumar1,P. Mallikarjuna Gowda1, S. B. Yogananada1 and N. Thammaiah2
1University of Agricultural Sciences, Bengaluru, Karnataka, India
2University of Horticultural Sciences, Bagalkot, India
*Corresponding author
Abstract:

An experiment on evaluation of fungicides, sea weed biomolecules and screening of fifty commercially available varieties/hybrids against early blight of tomato was conducted to study at ARS, Gunjevu during 2018-19. The result clearly indicates that the least disease severity of 14.33% was recorded in Hexaconazole5%EC @ 0.10% which showed significantly superior over other treatments. The next least disease severity of 15.74% was recorded in Trifloxystrobin 25 + Tebuconazole 50%WG @ 0.07% and which was at par with Hexaconazole 5% EC. While, Fluxapyraxad 250 + Pyraclostrobin 250SC @ 0.05% and Difenoconazole 25%EC @ 0.10% has recorded 21.70% and 23.18% disease severity respectively and were statistically at par with each other.  Among the two sea weed bio molecules evaluated 39.26% severity was recorded in Sea weed bio molecule LBD12 followed by 43.26% in Sea weed bio molecule LBD1. Among the different treatment maximum fruit yield of 57.68 t/ha was noticed in Hexaconazole 5%EC @ 0.1% followed by 57.19 t/ha was recorded in Trifloxystrobin 25 + Tebuconazole 50%WG @ 0.07%. The least fruit yield of 41.06 t/ha was recorded in untreated plots. The similar trends were observed in field experiment of 2019-20 and the Hexaconazole 5%EC @ 0.1% has recorded least disease severity of 21.22% with highest yield of 58.40 t/ha. The economics of cost benefit ratio was worked for different fungicides evaluated and it was found that the  highest cost benefit ratio was obtained by Hexaconazole 5% EC (2.03) followed by Trifloxystrobin 25 + Tebuconazole50%WG(1.88). Among the fifty commercial varieties/hybrids evaluated three varieties/ hybrids (Arka Surabh, Arka Samrat and Arka Vikas) showed moderately resistant (MR) reactions. The thirty four varieties/hybrids showed susceptible (S) reaction and the remaining thirteen varieties/hybrids recorded highly susceptible reaction (HS).


Keywords: Early blight, Alternaria solani, Fungicides, Sea weed biomolecules, Screening varieties
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How to cite this article:

Sudarshan, G. K., M. S. Nagaraj, M. K. Prasanna Kumar, A. P. Mallikarjuna Gowda, S. B. Yogananada and Thammaiah, N. 2020. Field Evaluation of Fungicides, Sea Weed Biomolecules and Screening of Available Varieties/ Hybrids against Early Blight of Tomato caused by Alternaria solani.Int.J.Curr.Microbiol.App.Sci. 9(10): 1484-1493. doi: https://doi.org/10.20546/ijcmas.2020.910.177