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  • Thousand Cankers Disease of Walnut

    Black walnut is ecologically and economically important to Missouri, and thousand cankers disease (TCD) represents a serious threat to this resource. TCD occurs when the walnut twig beetle (WTB), Pityophthorus juglandis, attacks walnut trees, spreading the fungus Geosmithia morbida which...

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University of Missouri Extension Master Gardener Program