The status of fire blight disease on pome fruits in west Azarbaijan province and Ghazvin in 1991-1992.
Erwinia amylovora was originally detected on pear trees in Karaj, Iran. A further survey showed the establishment of the disease in many fruit tree orchards in Ghazvin and west Azarbaijan provinces. Yield loss in infected areas was heavy and an unexpected wet season correlated with the progression of infection. Diseased samples of various susceptible hosts including pear, apple, quince and rose were collected from different fire blight affected areas throughout the year. A total of 74 strains of E. amylovora and 5 strains of Pseudomonas syringae were isolated and identified according to physiological, biochemical and pathogenicity tests. E. amylovora was confirmed as the causal agent of the disease in Iran.