Thousand cankers disease (TCD) is an emerging tree disease that is responsible for the death of ornamental eastern black walnut species throughout the country. In California, TCD is contributing to the decline of other native black walnut trees as well as English walnut trees in nut-producing orchards. TCD is caused by a fungal pathogen transmitted by the walnut twig beetle (WTB). There is great concern over the potential for further spread of TCD throughout the native range of eastern black walnut, as well as uncertainty about the disease’s potential agricultural and ecological impacts in the USA and in Italy, where it was first reported in 2013.
Read about: Thousand cankers disease research increases awareness and solutions for walnut industry | View Other Stories