Pathogenicity test of the isolates of Pyricularia oryzae in the hosts of wheat, barley, rice and braquiaria.
A Species of fungi of the genus Pyricularia are associated with the blight disease in plants of the family Poaceae. Pyricularia oryzae is the species with the highest incidence and distribution worldwide, causing losses in crops of economic importance such as rice, oats, barley, wheat and triticale. Thus, this study aimed to characterize the pathogenicity spectrum of P. oryzae of wheat and invasive plants in wheat, brachiaria, rice and barley hosts. The research was conducted in the Laboratory and in the greenhouse at the State University of Goiás, at Campus de Jataí. Twenty-eight isolates of Pyricularia oryzae obtained from infected leaf samples of wheat field invasive plants were tested and two isolates of Pyricularia oryzae were obtained from the ear of rice. According to the results, it was concluded that the isolates of Pyricularia oryzae tested were pathogenic to wheat, barley, rice and brachiaria, with differences in aggressiveness.