Developing a kiln treatment schedule for sanitizing black walnut wood of the walnut twig beetle
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Geosmithia morbida is a fungus that causes numerous cankers on branches and trunks of walnut tree species (Juglans spp.), hence the common name "Thousand Cankers Disease" (TCD), which results in widespread morbidity and ultimately, tree mortality. This fungus is vectored by the walnut twig beetle (Pityophthorus juglandis) that feeds aggressively in the bark. Subsequently, cankers develop around the beetle galleries in the phloem. TCD is currently a major concern in Colorado. The beetle and fungus have been identified and confirmed in three states within the native distribution of black walnut ...