Corylus colurna Turkish hazel suffering

Corylus colurna Turkish hazel suffering

Observation - Corylus colurna Turkish hazel suffering - Global. Description: I am after the organism that is damaging these Corylus colurna trees (if it is an organism rather than drought or some other soil issue). Healthy tree shown on left in first picture then line of suffering trees, some had much of the canopy with leaves re

I am after the organism that is damaging these Corylus colurna trees (if it is an organism rather than drought or some other soil issue). Healthy tree shown on left in first picture then line of suffering trees, some had much of the canopy with leaves recently severely wilted (not shown here). This type of tree is normally pest/disease free and drought tolerant. Trees well established.