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Horticulture and Home Pest News
Horticulture & Home Pest News is filled with articles on current horticulture, plant care, pest management, and common household pests written by Iowa State University Extension specialists in the Departments of Entomology, Horticulture and Plant Pathology.

New Threat to Iowa Trees - Thousand Cankers Disease of Black Walnut

This article was published originally on 11/11/2009

 
Thousand cankers of walnut is an insect vectored disease that kills black walnut trees. So far the disease has been reported in western states and not in Iowa or other parts of the native range of black walnut. However, like other tree disease and insect pests this one is easily spread by human transport of wood materials. Pass the word along about this emerging disease problem and keep an eye on your walnut trees.
For more information please see the ISU Yard & Garden Column.
 
Thousand cankers are caused by Geosmithia sp. fungi.