Intraspecific variability of Geosmithia morbida the causal agent of thousand cankers disease, and effects of temperature, isolate and host family (Juglans nigra) on canker development
Since the mid-1990's widespread mortality of Black Walnut (Juglans nigra) in the western United States has been noted. This mortality is the result of aggressive feeding of the Walnut twig beetle (Pityophthorus juglandis) and subsequent canker development caused by the newly named fungus Geosmithia morbida. Thousand Canker Disease (TCD) has been confirmed in Oregon, Washington, Idaho, Utah, California, Colorado, New Mexico, Arizona and recently in the native range of J. nigra, in Tennessee, Pennsylvania, and Virginia. Intraspecific variability of isolates was determined using rDNA ITS partial ...
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