Effect of Temeperature and PH on Growth of Alternaria tagetica, Leaf Blight of Marigold

DOI: 10.18805/BKAP291    | Article Id: BKAP291 | Page : 76-78
Citation :- Effect of Temeperature and PH on Growth of Alternaria tagetica, Leaf Blight of Marigold.Bhartiya Krishi Anusandhan Patrika.2021.(36):76-78
Karuna Chandrakant Kurhade, Hanumant Dnyandeo Gangawane, C.D. Deokar, K.S. Raghuwanshi kurhadekaruna@gmail.com
Address : PGI, Mahatma Phule Krishi Vidypeeth, Rahuri-413 722, Maharashtra, India.
Submitted Date : 3-06-2021
Accepted Date : 22-06-2021


Marigold (Tagets erecta) is one of the most important major floriculture crop in India. The leaf blight of marigold is caused by Alternaria tagetica is becoming a common disease on marigold Alternaria blight appeared in mild to severe form in many regions of Maharashtra and sometimes resulting in complete failure of the crop especially during rainy season. The fungal pathogen are greatly influenced by environmental factor therefore the present work undertaken to study the effect of temperature and pH on growth of Alternaria tagetica. The effect of temperature and pH were determined by colony diameter method by using different media like potato dextrose agar and oat meal agar medium. It is clearly evident from the result that all the temperature pH tested showed variation in the diameter of colony. The temperature 25oC encouraged better growth of Alternaria tagetica as compared to 15oC and 35oC. The result also revealed that pH 6 and 7 encouraged better growth of Alternaria tagetica it is concluded from the result that temperature 25oC and pH 6 is optimum temperature and pH for the growth Alternaria tagetica.


Alternaria alternata pH Soyabean Temperature


  1. Gaddanakeri, M. and Kulkarni, S. (1998). Physiological studies on Alternaria alternata (Fr.) Keissler a causal agent of leaf blight of turmeric. Karnataka J. of Agri. Sci. 11(3): 684- 686.
  2. Hubballi, M., Sevugapperumal, N., Raguchander, T., Anand, T. and Ramasamy, S. (2010). Effect of Environmental Conditions on Growth of Alternaria alternata Causing Leaf Blight of Noni. World J of Agri. Sci. 6 (2): 171-177.
  3. Kumar Arun, G.S. (2008). Studies on leaf blight of chrysanthemum Caused by Alternaria alternata (Fr.) Keissler. Master of Science (Agriculture) in plant pathology. Department of plant pathology college of agriculture, Dharwad University of Agricultural Sciences.
  4. Kumar, D. and Choudhary, U. (2006). In vitro evaluation of role of hydrogen ion concentration on mycelial growth and sporulation of A.brassicae and A. brassicola. J. of Res. SKUAT-J. 5(1): 122-124.
  5. Panchal, D.G. (2008). Alternaria fruit rot of tomato (Lycopersicon esculentum Mill.) and its management. M. Sc. thesis submitted to AnandAgricultural University, Anand.
  6. Panwar, V., Gangwar, R.K., Javeria, S. and Yadav, R.S. (2013). Antifungal efficacy of fungicides and bio-control agents against leaf spot pathogen, Alternaria alternata. Current Discovery. 2: 128-133.
  7. Singh, J. and Majumdar, V.L. (2004). Factor affecting development of post harvest Alternaria rot in pomegranate. J. Mycol. Pl. Pathol. 34(2): 310-311.
  8. Singh, V., Kumar, P. and Sinha, A.P. (2001). Influence of different media, pH and temperature on growth and sporulation of Alternaria alternata (Fr.) Keissler, causing alternaria blight of chickpea, Legume Res. 24(2): 238-242.
  9. Thakur, S. and Harsh, N.S.K., (2014). Phylloplane fungi as biocontrol agent against Alternaria leaf spot disease of (Akarkara) Spilanthes oleracea. Biosci. Disc. 5(2): 139-144. 

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