First identification of a 'Candidatus Phytoplasma fragariae'‐related strain infecting Corylus avellana in southern Switzerland.

A study conducted in southern Switzerland has identified the first instance of a 'Candidatus Phytoplasma fragariae'-related strain infecting Corylus avellana, commonly known as hazel. Phytoplasmas are associated with serious diseases in various plants, and infected woody species can be difficult to detect due to their asymptomatic nature. The study found two hazel trees positive for phytoplasmas, with genetic analysis confirming their relation to 'Ca. P. fragariae'. Further research is needed to determine the potential threat of this strain to forest trees and hazelnut orchards, as well as to identify potential insect vectors. [Extracted from the article]