MORPHOLOGICAL CHARACTERIZATION AND IDENTIFICATION OF BACTERIAL BLIGHT PATHOGENS ASSOCIATED WITH RICE CROPS OF SINDH

Abstract

Rice bacterial leaf blight is an injurious disease among all disquieting problems of rice in Pakistan. The key and
main procedure for its control is identification and characterization of its causal agent. To achieve the goals, a
comprehensive surveillance was made to collect infected samples. Associated bacteria were isolated from these
diseased specimens by direct plating method. Then cultures were subjected for purification and morphological
characterization. Their colonies were small, medium and large. The shapes of colonies were filamentous, circular
and irregular on Nutrient Agar (N.A) media. Their elevation was convex, raised and their edges were entire and
undulate. The color of c