Ireland is losing its battle to save ash trees from killer fungus
Published 21/11/2016 | 13:44
A disease affecting ash trees is continuing to spread across the country, despite control efforts by landowners and the Department of Agriculture.
Chalara or Ash Dieback disease is a disease of ash trees caused by the fungus Hymenoscyphus fraxineus and it has spread rapidly across Europe in recent years.
And the latest figures from the Department of Agriculture show that year on year that there is a continuing rise in the number and geographic distribution of confirmed findings nationally and is present in every county.
The origins of the disease are still unknown, but scientists have suggested the disease may have been introduced to Europe from eastern Asia.
Ash trees affected by the disease suffer wilting foliage, crown dieback and bark lesions.
The disease can kill an infected tree directly as over time necrotic lesions gradually encircle and permanently damage the phloem: (the innermost layer of bark) which is the layer of living tissue that carries organic nutrients to the others parts of the plant, or indirectly by weakening the tree to the point where it becomes more susceptible, and succumbs more readily, to attacks by other pests or pathogens, especially Armillaria fungi or honey fungus.