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walnut twig beetle (Pityophthorus juglandis)

walnut twig beetle (Pityophthorus juglandis)

The walnut twig beetle (Pityophthorus juglandis) is quite small in size but packs a punch, spreading a fungal pathogen that causes thousand cankers disease in walnut trees. (Photo by Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org)

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