EFFECT OF TEMPERATURE ON Alternaria alternata CAUSING BROWN SPOT OF POTATO

SHRISHTI LINGWAL¹*, ASHA SINHA², J.P. RAI^3
1Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005
²Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005
³Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005
* Corresponding Author : l.shrish.10@gmail.com

Received : 11-03-2018     Accepted : 14-03-2018     Published : 30-03-2018
Volume : 10     Issue : 3       Pages : 1046 - 1048
Int J Microbiol Res 10.3 (2018):1046-1048
DOI : http://dx.doi.org/10.9735/0975-5276.10.3.1046-1048

Keywords : Alternaria alternata, Brown spot, Potato, Temperature, Uttar Pradesh
Academic Editor : Dr. Muttanna Revadi
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Banaras Hindu University, Varanasi, Uttar Pradesh, 221005. Author thankful to University Grant Commission, New Delhi for research fellowship.
Author Contribution : All author equally contributed

A total of thirty isolates of A.alternata were evaluated for their characteristics at four different temperatures viz., 15, 20, 25and 30oC on potato dextrose agar medium (PDA).The data recorded on colony diameter and rate of growth after incubation at various temperature was found significantly different. Results revealed that most of the isolate had maximum growth at 30°C followed by 25°C. Minimum growth for most of the isolates was recorded in 15°C followed by 20°C. Rate of growth at different temperatures for most of the isolates of A.alternata was also found significantly maximum at 30°C followed by 25°C except few isolates like Pindra, Chirrayyakot, Jamalpur (JJ), Keshavpur, Bhikharipur, Raibarely and Nalanda where growth rate at 25°C was higher than 30°C.

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