N. Rajinimala1*, K. Elanchezhyan2, S. Kanmani 1, D. Lenin Raja3 and J. Sheela1
1 Department of Plant Pathology, Tamil Nadu Agricultural University, V.O. Chidambaranar Agricultural College and Research Institute, Killikulam
2 Department of Agricultural Entomology, Tamil Nadu Agricultural University, V.O. Chidambaranar Agricultural College and Research Institute, Killikulam
3 Department of Natural Resource Management, Horticultural College and Research Institute, TNAU, Periyakulam 625 604, Tamil Nadu, India
Email: rajinimala@tnau.ac.in
Received-12.09.2024, Revised-05.10.2024, Accepted-17.10.2024
Abstract: A survey was conducted in major groundnut growing areas of Tirunelveli, Thoothukudi and Tenkasi districts to assess dry root rot disease incidence and to collect infected plant samples from the surveyed areas. Maximum percent disease incidence of 54.33 was recorded in Killikulam village of Thoothukudi district. Four isolates of Macrophomina phaseolina namely GM1, GM2, GM3 and GM4 were obtained from the samples collected from Serndhamaram, Killikulam, Pudur and Surandai respectively. The isolates were morphologically identified by observing colony colour, colony texture, growth rate and production of sclerotia. Under pathogenicity test, all the isolates were found pathogenic and the isolate collected from Killikulam (GM2) recorded highest disease incidence by causing complete wilting of plants and proved its virulence.
Keywords: Root rot, Macrophomina, Groundnut
References
Choudhary, S., Choudhary, A.K. and Sharma, O.P. (2011). Screening of mungbean (Vigna radiata) genotypes to identify source of resistance to dry root rot. Journal of Food Legumes, 24(2):117-119.
Claudino, M. R. and Soares, D.J. (2014). Pathogenicity and aggressiveness of Macrophomina phaseolina isolates to castor (Ricinus communis). Tropical Plant Pathology, 39(6):453- 456.
Kumar, V. and Thirumalaisamy, P.P. (2016). Diseases of groundnut. In: Disease of field crops and their management. Indian Phytopathological Society, Today and Tomorrow’s Printers and Publishers, New Delhi. 445-494.
Manjunatha, H. and Saifulla, M. (2018). Variation in virulence of Macrophomina phaseolina isolates causing dry root rot of chickpea and performance of chickpea genotypes against this disease. Legume Research-An International Journal, 41(3):468-473.
Mayee, C.D. and Datar, V.V. (1986). Phytopathometry. Technical bulletin 1 (Special bulletin 3), Parbhani, Marathwada Agricultural University.
Mohanapriya, R., Naveenkumar, R. and Balabaskar. P. (2017). Survey, virulence and pathogenicity of root rot incidence of cowpea in selected districts of Tamilnadu caused by Macrophomina phaseolina (Tassi.) Goid. International Journal of Current Microbiology and Applied Science, 6:694-705.
Muthukumar, A., Naveenkunar, R. and Venkatesh, A. (2014). Efficacy of water extracts of some mangrove plants for eco-friendly management of root rot disease of groundnut. Journal of Plant Pathology & Microbiology, 5(5):1.
Palaiah, P., Narendrappa, T. and Mallesh, S.B. (2019). Screening of Groundnut Varieties and Germplasm against Collar rot, Stem rot and Dry Root rot Diseases. International Journal of Current Microbiology and Applied Science, 8(6):2321-2328.
Rangaswami, G. (1972). Diseases of crop plants in India. Prentice-Hall of India, New Delhi.
Riker, Joyce, A. and Riker, R.S. (1936). Introduction to research on plant diseases. John S. Swift Company Incorporated, Newyork, 177.
Seethapathy, P., Kurusamy, R. and Kuppusamy, P. (2017). Soil borne diseases of major pulses and their biological management. Innovative Farming, 2(1):1-11.
Shekhar, M., Kumar, S., Sharma, R. C. and Singh, R. (2008). Sources of resistance against post-flowering stalk rots of maize. Archives of Phytopathology and Plant Protection, 43(3), 259–263.