tailieunhanh - Evaluation of host plant resistance for blast and brown spot diseases of paddy in hill zone of Karnataka, India

Rice (OryzasativaL.) is an important cereal crop belonging to the family Poaceae and has two cultivated and 22 wild species. The cultivated species are Oryza sativa and Oryzaglaberrima. Oryza sativa is grown all over the world. Rice is known to suffer from number of diseases caused by fungal, bacterial and viral origins. Identification of resistant genotypes is again an essential continuous process either to recommend for cultivation in endemic area or to use as donors of the resistant genes. In view of these, the present investigation of evaluation of 244 rice varieties/genotypes against leaf and neck blast and brown spot diseases were carried out during Kharif 2014 at AHRS, Ponnampet to identify the sources of resistance under field conditions. 244 entries were tested in Uniform blast screening nursery for leaf blast and transplanted field of screening for neck blast and brown spot diseases resistance of paddy, out of which a IET-23609 found highly resistant to leaf blast disease of paddy and nine entries . IET-23081, 23642, 23616, 23652, 23645, 23612, 23637, 23300, 23299showed resistant reactions to the leaf blast and remaining entries were found moderately resistant to highly susceptible reaction to leaf blast. | Evaluation of host plant resistance for blast and brown spot diseases of paddy in hill zone of Karnataka, India