Mountain Ash Ringspot

European mountain ash ringspot-associated virus, or EMARAV, is a plant virus that primarily affects trees in the former Sorbus genus, including Rowan, Whitebeam, Service tree, and Wild service tree. The virus has been reported in Scotland and Northern England, but it is likely more widespread than initially thought. 

The virus causes discoloration and mottling of the leaves, in the early stages of infection this can look more like chlorotic speckling. Infected trees grow more slowly and may suffer gradual dieback over several years due to reduced leaf productivity. 

The virus can be confused with other conditions like mountain ash juniper rust and damage from gall mites, but these have distinct symptoms. The trees productivity can be reduced, meaning it becomes more susceptible to other damaging factors. 

For more information about Mountain ash ringspot, see the resources below.