Xylella fastidiosa does not occur in Turkey
The NPPO of Turkey officially announced that Xylella fastidiosa (EPPO A1 List) is absent from its territory. The possible presence of the bacterium on almond trees (Prunus dulcis) in 7 orchards had been reported in a scientific paper (Güldür, 2005). Following the publication of this paper, the situation has been extensively investigated by the Turkish NPPO. As a result, the following points were highlighted: 1) the diagnosis made in 2005 was based only on DAS-ELISA and not confirmed by PCR tests; 2) at locations mentioned in the above paper, all suspicious almond trees had been destroyed and in subsequent surveys (visual inspection and testing) the bacterium was not detected; 3) since the publication of this paper, no further detections have been made in Turkey. The NPPO concludes that X. fastidiosa should be considered as absent from Turkey.
The situation of Xylella fastidiosa in Turkey can be described as follows: Absent, confirmed by survey.
Güldür ME, Çağlar BK, Castellano MA, Ünlü L, Güran S, Yılmaz MA, Martelli GP (2005) First report of almond leaf scorch in Turkey. Journal of Plant Pathology 87(3), p 246.
NPPO of Turkey (2016-10).
Also available from the IPPC website: https://www.ippc.int/static/media/files/pestreport/2016/10/06/Turkey_Decleration.pdf