Bacterial spot of peaches (Xanthomonas arboricola pv. pruni) in peach and plum orchards in Slovenia
2002
Seljak, G. (Kmetijsko gozdarska zbornica, Nova Gorica (Slovenia)) | Dreo, T. | Ravnikar, M. (National Inst. of Biology, Ljubljana (Slovenia))
Bacterial spot of peaches, caused by Xanthomonas arboricola pv. pruni (Smith) Vauterin et al. is listed on II.A.II Slovene quarantine list. It was transferred to this list in 1996 after symptoms appeared on plums of Chinese - Japanese origin in 1992 in surroundings of Miren in Vipava Valley. After 1996 the disease broke out in peach orchards in the vicinity of Bilje, Bukovica and Prvacina. Currently it is present in Vipava Valley and southern parts of Brda. Development of symptoms is dependent on the cultivar, weather, agricultural and plant health measures. In 1999, the identity of the causative agent was confirmed using laboratory methods. The paper describes bacterial spot symptoms, epidemiology, current spread in Slovenia and diagnostic methods. The possibilities of disease control with phytosanitary measures and treatments with copper fungicides in the period of leaf drop and during winter period are discussed.
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