First report of Xanthomonas arboricola pv. pruni in Hungary
In Hungary, symptoms of bacterial spot were observed in June 2016 on apricot (Prunus armeniaca cvs. Bergecot and Toyesi) trees in a commercial orchard (5 ha) in Fejér county. Affected trees displayed red-purple necrotic leaf lesions (1-5 mm diameter) surrounded by a chlorotic halo, and water-soaked or dark brown sunken lesions on the fruit. Disease incidence ranged from low (10%) on cv. Toyesi to more than 90% on cv. Bergecot. As the disease progressed, the necrotic areas on leaves dropped out, leaving a ‘shot-hole’ appearance. Symptomatic leaf and fruit samples were collected from 20 apricot trees and tested (biochemical, molecular, and pathogenicity tests). Results confirmed the presence of Xanthomonas arboricola pv. pruni (EPPO A2 List) in diseased samples. This is the first time that X. arboricola pv. pruni is reported from Hungary.
The situation of Xanthomonas arboricola pv. pruni in Hungary can be described as follows: Present, first found in 2016 in 1 apricot orchard in Fejér county.
Sources
Schwarczinger I, Bozsó Z, Szatmári Á, Süle S, Szabó Z, Király L (2017) First report of bacterial spot caused by Xanthomonas arboricola pv. pruni on apricot in Hungary. Plant Disease 101(6), p 1031.