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Thousand Cankers Black Walnut Disease

This is a newly recognized disease (2008) of primarily Black walnut (Juglans nigra) and caused by a fungus, Geosmithia morbida, that is vectored into the tree by the walnut twig beetle (Pityophthorous juglandis).

This website discusses the symptions of the disease, the life cycle of the borer and fungus, early detection signs, survivability of infected trees, and available treatment options.

Thousand Cankers Black Walnut Disease

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