First report of fire blight disease caused by Erwinia amylovora on rockspray (Cotoneaster horizontalis) in Turkey.
In the late summer and early winter of 2008 and 2009, leaf and shoot blight and cankers with reddish and brownish necrotic tissue on mature branches of Cotoneaster horizontalis were investigated in landscape areas of Konya province in Turkey. Disease incidence was estimated at 2%. Bacteria were consistently isolated from the lesions on leaves and shoots on nutrient sucrose agar medium. The causal organism was identified as Erwinia amylovora based on cultural, morphological, physiological, genetic and pathogenicity analyses. This is thought to be the first report of E. amylovora on C. horizontalis in Turkey.