Physiological Studies on Alternaria solani causing early blight of Potato in Eastern Uttar Pradesh

The maximum growth of 89.00 mm was noticed when exposed to 12 hours dark 12 hours light followed by 24 hours light 24 hours dark, 4 hours dark 20 hours light, 8 hours dark 16 hours light and least radial growth of 81.80 mm was recorded in treatment with exposure to 8 hours light and 16 hours dark. The mycelial growth from inoculated flasks was harvested everyday starting from first day up to 14th day. Subsequently, reduction in the growth of mycelium was observed due to autolysis. The 250C temperature and 7.0 pH were found ideal for the growth of A. solani.

Potato (Solanum tuberosum L.) is the most important food crop grown throughout the world. It is emerged as one of the most important food crops. India is the second largest producer of potato contributing 10-11% of the world potato production after China with the production of 50.33 million tons from an area of 1.843 million ha. . The total area in world under potato cultivation is 193.03 mha and total production is 388.19 m tones with 20.11 tones productivity. Where as in India, total area is 21.24 m ha and production is 50.30m tones with 23.9 tones productivity. The contribution of U.P. alone in area and production is 0.614 million ha and 15.56 million tones with 22.77/ha productivity (Anonymous, 2017), respectively.

Refbacks

Adhikari, P., Oh, Y. and Panthee, D. R. (2017) Current Status of Early Blight Resistance in Tomato: An Update, International Journal of Molecular Sciences, pp: 1-22. Anonymous (2017) National Horticulture Database 2017, NHB, Ministry of Agric., Govt. of India, Aristo Printing Press, New Delhi. Arunakumara, K. T. (2006) Studies on Alternaria solani (Ellis and Martin) Jones and Grout Causing Early Blilght of Tomato, M.Sc., Thesis, Dharwad: pp: 1-70. Fencelli M. I. and Kimati, H. (1990) Influence of culture media and fluorescent light on the sporulation of Alternaria dauci, Phytopathologica, 16: 248-252. Hubballi, M., Nakkeeran, S., Raguchander, T., Anand, T. and Samiyappan, R. (2010) Effect of Environmental conditions on growth of Alternaria alternata causing leaf blight of Noni, World Journal of Agricultural Sciences, 6(2): 171-177. Khurana, S. M. P. (2000) Early blight and leaf spots, diseases and pests of potato- A manual, CPRI, Shimla, pp: 66. Kulkarni, N. K. (1998) Studies on early blight of potato (Solanum tuberosum L.) caused by Alternaria solani (Ellis and Martin) Jones and Grout, M.Sc. (Ag.) Thesis, University of Agricultural Sciences, Bangalore, pp: 88. Kumar, A., Pathak, S. P., Rai, J. P., Abhimanyu and Kumar, D. (2016) Variability among isolates of Alternaria solani causing early blight of potato in Eastern Uttar Pradesh, Indian Phytopath., 69(4S): 124-127. Kumar, S. and Srivastava, K. (2013) Screening of tomato genotypes against early blight (Alternaria solani) under field condition, The Bioscan, 8(1): 189-193. Naik, M. K., Prasad, Y., Bhat, K. V. and Rani, G. S. (2010) Marphological, Physiological, Pathogenic and molecular variability among isolates of A. solani, Indian Phytopath., 63(2): 168-173. Pandey, K. K., Singh, R. P., Singh, A. K. and Singh, P. C. (2010) Cultural morphological, pathogenic and molecular variability amongst tomato isolates of Alternaria solani in India, World J. Microbiol. Biotechnol., 24: 1003-1009. Rodrigues, T. M. S., Maffia, L. A., Dhingra, O. D. and Mizubuti, E. S. G. (2010) In vitro production of conidia of Alternaria solani, Tropical Plant Pathology, 35(4): 203-212. Singh, A., Singh, V. and Yadav, S. M. (2014) Cultural, Morphological and Pathogenic Variability of Alternaria solani causing early blight in Tomato, Plant Pathology Journal, 13: 167-172. Upadhyay, D. N. (2009) Potato disease- an ecological treatise, 5th International Conference on Plant Pathology in Globalized Era, Nov. 10-13, 2009, New Delhi, pp: 52.