2011•Archives of Phytopathology and Plant ProtectionRequires access
Sources of resistance toExserohilum turcicum(Pass.) andPuccinia polysora(Underw.) incitant of Turcicum leaf blight and polysora rust of maize
Sangit Kumar, K. T. Pardurange Gowda, S. K. Pant, Meena Shekhar, Bupesh Kumar, Bineet Kaur, K. Hettiara Chchi, Onkar Nath Singh II, B. H. Parsanna
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Abstract
A study was carried out to identify the sources of resistance to Turcicum leaf blight (TLB) and polysora rust in maize. Sixty indigenous and exotic inbred lines were evaluated under artificial epiphytotic conditions at two identified hot spot locations, Almora and Nagenahalli. After two years continuous screening, a total of 20 inbred lines were identified as a sources of resistance at both the locations for TLB, whereas 10 inbred lines were identified resistant against Polysora rust at Nagenahalli. A clear cut variation in virulence pattern in case of E. turcicum was observed. Some of the inbred inbred lines, i.e CM 138, CM 212, IML 235, NAI 135, showed resistant reaction in both the locations in the year 2005, whereas they acted as susceptible in 2006 at both locations. It was also observed that the Nagenahalli isolate of E. turcicum was more virulent than the Almora isolate.