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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (535) Last page : (543)
Article doi: http://dx.doi.org/10.18782/2320-7051.3071

Effect of Various Factors (Temperature, pH and Light Intensity) on Growth of Colletotrichum capsici Isolated from Infected Chilli

Siva Kesavarao Kommula1*, Geddi Purna Dattha Reddy2, Prasad Undrajavarapu3, and Krishna Sowjanya Kanchana4
1Department of Biochemistry, Dr Y.S.R. Horticultural University, Anantharajupeta, Andhra Pradesh, India
2Department of vegetable science, Dr Y.S.R. Horticultural University, Anantharajupeta, Andhra Pradesh, India
3Department of Biotechnology, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India
4Department of Biotechnology, Andhra University, Visakhapatnam, Andhra Pradesh, India
*Corresponding Author E-mail: kskraok@gmail.com
Received: 1.06.2017  |  Revised: 7.07.2017   |  Accepted: 10.07.2017  


Chilli is an important vegetable and a spice crop worldwide and one of the most important vegetables in India. Andhra Pradesh, Karnataka, Maharashtra, Orissa, West Bengal, Tamil Nadu, Madhya Pradesh, Gujarat, Assam, Rajasthan and Punjab are found to be important states growing chilli in India. Guntur District contributes 30% of the total chilli produced in India, where as Andhra Pradesh as a whole contributes 75% of India’s chilli exports.  The chief constituent of chilli, Capsaicin has antioxidant, antibacterial and anti-cancerous properties. Anthracnose caused by Colletotrichum capsici is a major problem in India and one of the more significant economic constraints of chilli production worldwide, especially in tropical and subtropical regions. Three isolates of C.capsici were collected from different chilli growing areas of Guntur District and their pathogenicity was proved under laboratory conditions. Effect of different pH levels, temperature, light intensity and seed quality tested against the growth of C. capsici under in vitro. Results indicated that the growth of C. capsici was maximum at pH range of 6.50-7.00 and temperature range of 25-30°C. Exposure of the fungus to alternate cycles of 12 hr light and 12 hr darkness resulted in the maximum mycelia growth of C. capsici compared to the 24 hr exposure to either continuous light or dark. Potato dextrose agar medium supported significantly the maximum growth of all the three isolates of C. capsici. Further, the strains were found to vary morphologically between the isolates under the study.

Key words: Chilli, Anthracnose, pathogenicity test, seed quality test, temperature, pH and light intensity.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Kommula, S.K., Reddy, G.P.D., Undrajavarapu, P., and Kanchana, K.S., Effect of Various Factors (Temperature, pH and Light Intensity) on Growth of Colletotrichum capsici Isolatedfrom Infected Chilli, Int. J. Pure App. Biosci.5(6): 535-543 (2017). doi: http://dx.doi.org/10.18782/2320-7051.3071