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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(5): 1725-1736
DOI: https://doi.org/10.20546/ijcmas.2017.605.187


Epidemiological Studies on Early Blight of Potato under Climate Change and its Co-Relation with Disease Severity
Praveen Kumar, S.K. Biswas*, Virendra Kumar and Kishan Lal
Department of Plant Pathology, C.S.A. University of Agriculture and Technology, Kanpur-208002, India
*Corresponding author
Abstract:

Occurrence and severity of Early blight of potato observed that the disease occured every year at Kanpur and Faizabad district of Utter Pradesh. It has observed that the disease was first appeared during 2–3rd weeks of December at Kanpur and 3rd weeks of December to 1st weeks of January at Faizabad district of Uttar Pradesh at the maximum temperature range 17–230C, minimum temperature 1.8–7.80C, relative humidity 46–93%, and 0–7.2 sun shine hours. The maximum severity with 28.20 per cent was noted on 24 January, 2012 after 40th days of first appearance of disease at the maximum temperature 23.0oC and minimum temperature 5.6oC, relative humidity ranges 54 -85% and sun shine hours 6.9 whereas, in the year 2013, maximum severity of 14.11 per cent on 23 January, 2013 after 41 days first appearance of disease at temperature range between 24.8oC to 8.8, relative humidity 62–90% and 7.0 sun shine hours, respectively. It has also found that infection rate increases with occurrence of rainfall, resulted high relative humidity and low sunshine hours which are optimum for growth and sporulation of the pathogen during both the year. Similar observation has also been recorded at Faizabad district of Uttar Pradesh. The co-relation between disease severity with temperature, relative humidity and sunshine hours were calculated by standard statistical calculation and the results showed that disease severity co-relate negatively with temperature (- 0.17845, - 0.51214) and sunshine hours (-0.04185, - 0.70934) and positive correlation with relative humidity (0.638215, 0.149054) at Kanpur during 2011 -2012. Similar observation has also been recorded in both the year at Faizabad.


Keywords: Early blight, Disease severity, Weather parameters, Climate change
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How to cite this article:

Praveen Kumar, S.K. Biswas, Virendra Kumar and Kishan Lal. 2017. Epidemiological Studies on Early Blight of Potato under Climate Change and its Co-Relation with Disease Severity.Int.J.Curr.Microbiol.App.Sci. 6(5): 1725-1736. doi: https://doi.org/10.20546/ijcmas.2017.605.187