Zóra Annamária Nagy

1. Introduction Grapevine trunk diseases (GTDs) are among the most important diseases of grapevines, with estimated losses of 1.5 billion USD worldwide, while the average GTD incidences were reported to be between 10% (Spain) and 22% (Italy) in European vineyards [1,2,3,4]. Moreover, an increase in disease incidence has been recognized in several grape growing countries such as Spain, Italy, and Canada [5,6,7,8].