Erwinia amylovora - the causal agent of root collar necrosis of apple trees | Erwinia amylovora - prouzrokovac nekroze korenovog vrata stabla jabuke
2008
Gavrilovic, V., Institut za zastitu bilja i zivotnu sredinu, Beograd (Serbia) | Milijasevic, S., Institut za pesticide i zastitu zivotne sredine, Beograd (Serbia) | Todorovic, B., Institut za pesticide i zastitu zivotne sredine, Beograd (Serbia) | Zivkovic, S., Institut za zastitu bilja i zivotnu sredinu, Beograd (Serbia) | Trkulja, N., Institut za zastitu bilja i zivotnu sredinu, Beograd (Serbia)
A large-scale outbreak of fire blight symptoms caused by Erwinia amylovora was recorded in pome fruit trees during 2007. In addition to fruit necrosis and shoot blight as the typical disease symptoms, dark purple necrosis was observed in the root collar area girdling the trunk just above the ground and thus withering the whole apple tree. Since similar symptoms on apple trees could be caused by E. amylovora or one of several phytopathogenic fungi of the genera Phomopsis and Phytophthora, an investigaton was conducted to indentify the causal agent of this disease. Based on the results of pathogenicity test, biochemical characteristics, ELISA test and PCR analysis, it was conformed that the investigated strains belonging to E. amylovora, causing the root collar necrosis of apple trees as an atypical symptoms of this bacterium in Serbia.
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