engleski

Investigation of fire blight (Erwinia amylovora (Burrill) Winslow et al.) appearance in central Bosnia

Fire blight, caused by Erwinia amylovora (Burrill) Winslow et al., is considered as the most serious pear and apple disease in many countries around the world. This bacterial disease is included in the EPPO A2 and the EU Annex II/A2 lists, but also many other (non-EU) countries quarantine lists list it in order to prevent further spread. The fire blight causes typical tissue necrosis and in optimal conditions this can lead to complete plant destruction. Destruction degree depends on plant sensitivity to E. amylovora. In Bosnia and Herzegovina fire blight was confirmed on pear and individual apple trees back in 1990. Beside this fact, there is relatively little data about its distribution in the country. Although, typical symptoms simplify disease identification by visual inspection, for a precise diagnose and presence confirmation of this quarantine pathogen, laboratory tests are necessary. The aims of the research were to investigate the appearance of fire blight in central Bosnia, and to contribute in regional monitoring program of disease distribution. During the 2012 samples with fire blight symptoms were collected from several apple orchards located in central part of Bosnia and Hercegovina. After seeding on culture media, three samples with typical colonies were tested for the E. amylovora presence by methods according to EPPO diagnostic standards PM 7/20 (2). Commercial varieties (‘Idared’ and ‘Golden delicious’) were positive on applied nutritional and enzymatic identification tests, while the local variety ‘Senabija’ was bacteria free. The results of this research confirm fire blight appearance in central Bosnia (Sarajevo Canton).

: bacterial disease, Erwinia amylovora, fire blight, apple, quarantine lists

nije evidentirano