Pathogenic variability in Exserohilum turcicum and resistance to leaf blight in sorghum


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Authors

  • KUSUM MATHUR Department of Plant Pathology, Rajasthan College of Agriculture, MPUAT, Udaipur 313 00
  • R.P. THAKUR International Crops Research Institute for the Semi-arid Tropics (ICRISAT), Patancheru 502 324
  • V.P. RAO International Crops Research Institute for the Semi-arid Tropics (ICRISAT), Patancheru 502 324
  • K. JADONE Department of Plant Pathology, Rajasthan College of Agriculture, MPUAT, Udaipur 313 00
  • S. RATHORE Department of Plant Pathology, Rajasthan College of Agriculture, MPUAT, Udaipur 313 00
  • R. VELAZHAHAN Department of Plant Pathology, College of Agriculture, TNAU, Coimbatore 641 003

Abstract

Leaf blight caused by Exserohilum turcicum is a widely prevalent and economically important disease of sorghum in relatively cooler and humid regions of the world. Disease management through host plant resistance is the most effective strategy, but this requires information on population biology of the pathogen and the effect of environment. We studied pathogenic variability and disease resistance to leaf blight in sorghum through a collaborative Sorghum Leaf Blight Virulence Nursery (SLBVN). The SLBVN consisting of 20 diverse sorghum lines were tested at three locations in India for 1-3 seasons (2007-09). Leaf blight severity recorded at the soft-dough stage of the crop varied significantly among lines, years and locations, indicating potential differences in virulence of E. turcicum populations at different locations. Some sorghum lines showed differential reactions while lines (IS 2683, IS 3490, IS 9303, IS 10775, IS 12466, IS 18668, IS 19163, IS 25400 and IS 26863) exhibited resistance stability across environments (locations × years). These lines could be potential sources of resistance for utilization in leaf blight resistance breeding program.

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Vol. 64 No. 1 (2011): Indian Phytopathology

Section

Research Articles

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How to Cite

MATHUR, K., THAKUR, R., RAO, V., JADONE, K., RATHORE, S., & VELAZHAHAN, R. (2011). Pathogenic variability in Exserohilum turcicum and resistance to leaf blight in sorghum. Indian Phytopathology, 64(1). https://epubs.icar.org.in/index.php/IPPJ/article/view/6018