Diagnosing Thousand Cankers Disease of Walnut
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چکیده
Thousand cankers disease (TCD) is a newly recognized disease of various species of walnut (Juglans). Black walnut (Juglans nigra) is particularly susceptible to TCD and during the past decade it has devastated plantings of black walnut in most western states. In July 2010 thousand cankers disease was found over an extensive area around Knoxville, Tennessee, the first finding of TCD within the native range of J. nigra. Subsequently, in 2011, it was detected in the vicinity of Richmond, Virginia and in Bucks County, Pennsylvania. It is very possible that other unrecognized infestations of thousand cankers disease may be present in other areas in the eastern and Midwestern United States. It is very important in the management of this disease that the existing range of TCD is thoroughly documented.
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Questions and Answers about Thousand Cankers Disease of Walnut
What is thousand cankers disease of walnut? Thousand caners disease (TCD) is a newly recognized disease (2008) of certain walnut species (Juglans) caused by a fungus (Geosmithia morbida) that is vectored by a bark beetle (Pityophthorus juglandis, the “walnut twig beetle”). Thousand cankers disease has produced widespread death of walnuts in many western states during the past decade. In recent ...
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