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walnut trees in Boulder?

April 26, 2017Boulder trees walnut

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walnut trees in Boulder?

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There are a significant number of black walnut trees, dead and/or dying around Boulder. The rapid decline and tree mortality is the result of the walnut twig beetle (Pityophthorus juglandis) and a Geosmithia fungus. This previously unidentified beetle/fungus combination on black walnut trees has now officially been named, “Thousand Cankers Disease” by staff at Colorado State University (CSU).