This rapid PRA shows: Pseudomonas avellanae is a bacterial pathogen which infects hazel (Corylus avellana) and is the causal agent of hazelnut decline and dieback. Disease caused by P. avellanae was first reported in 1976 in northern Greece and has caused severe damage to hazelnut orchards in both northern Greece and central Italy. Despite these severe impacts its distribution has remained restricted to these areas. Pseudomonas avellanae has the potential to be very damaging to UK populations of hazel, with trees growing on highly acidic soils at significantly greater risk.

This version has had some minor updates following publication of the draft version.