First report of bacterial canker of kiwifruit caused by Pseudomonas syringae pv. actinidiae in Turkey.
During the spring and autumn of 2009 and 2010, diseased kiwifruit (Actinidia deliciosa cv. Hayward) were observed in Rize Province, Turkey. Disease incidence was estimated as 3% in approximately 10 hectares. Symptoms were characterized by dark brown spots surrounded by yellow halos on leaves and cankers with reddish exudate production on twigs and stems. Eight representative bacterial strains were isolated from leaf spots and tissues under the bark on Kingacute˜s B medium and identified as P. syringae pv. actinidiae based on the results of biochemical, physiological and PCR tests. This is thought to be the first report of P. syringae pv. actinidiae causing disease on kiwifruit in Turkey.