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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
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(11): 3160-3166
DOI: https://doi.org/10.20546/ijcmas.2017.611.370


Impact of Weather Parameter on Early Blight Epidemiology in Tomato Crop
Ekta P. Chothani1, H.J. Kapadiya1*, M.F. Acharya2 and C.M. Bhaliya1
1Department of Plant Pathology, Junagadh Agricultural University, Junagadh-362 001, India
2Department of Entomology, Junagadh Agricultural University, Junagadh-362 001, India
*Corresponding author
Abstract:

Increase in disease severity index (DSI) of early blight of tomato was comparatively higher in the maximum and minimum temperatures (35.2 – 38.30C), Evening RH (30-58 %) and wind speed (1.2–2.2 km/hr) during 41th to 46th Standard meteorological week (SMW), which were most congenial for disease development. The abiotic factors like minimum temperature (r= 0.90) and evening relative humidity(r= 0.77) were negatively highly correlated, while maximum temperature (r= 0.59) had negative significant impact on alternaria leaf blight of tomato. Wind speed showed positive and highly significant effects (r= 0.69) on development of early blight. The partial regression between leaf blight and abiotic factors indicated that an increase in 10C in maximum temperature, an increase in 1 km/hr wind speed and one per cent in evening RH, increase the early blight to the tune of 3.62, 6.56 and 0.14 DSI, respectively. The value of coefficient of determination (R2) indicating 88.45 per cent variation in disease severity of weather factors in tomato crop. The severity of early blight of tomato progress with increase in maximum temperature and wind speed whereas it declined with increase in minimum temperature on tomato.


Keywords: Early blight, Epidemiology, Correlation, Regression, Disease severity index.
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How to cite this article:

Ekta P. Chothani, H.J. Kapadiya, M.F. Acharya and Bhaliya, C.M. 2017. Impact of Weather Parameter on Early Blight Epidemiology in Tomato Crop.Int.J.Curr.Microbiol.App.Sci. 6(11): 3160-3166. doi: https://doi.org/10.20546/ijcmas.2017.611.370