Evaluation of different aromatic rice genotypes for the management of rice blast

Abstract

Rice an important staple food crop directly feeds more population than any other crop in the world. Rice crop is exposed to various biotic and abiotic stress which ultimately leads to yield loss. The blast disease caused by Pyricularia oryzae Cavara is one of the important diseases in the world. It is the most serious disease, prevailing in almost every rice growing regions in the world. Identifying genotypes showing resistance reaction against pathogen is one of the best ways to manage rice blast since it offers a cheap way of managing disease and have long-lasting effect. The experiment to evaluate suitable aromatic rice genotypes for blast resistance was conducted in the farm of Rice Research Station, Kaul during kharif 2021. In order to screen the promising resistant sources, 47 genotypes were screened for their resistance towards neck blast disease and observations were recorded as per the scale following SES of IRRI, (Anonymous, 2013) ^[1]. Out of forty-seven genotypes screened against neck blast, none of the genotypes was found to be highly resistant. Four genotypes viz., HKR19-405 HKR 03-408, PB 1509 and HKR19-412 were susceptible with the disease score of 7. Whereas, forty-three genotypes were highly susceptible with the disease score of 9.