EIPD Current Research Projects
- Title
- Thousand cankers disease and the walnut twig beetle: a rapidly emerging invasive threat to walnuts in California
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Bostock, Richard M.
Distinguished Professor, Plant Pathologist-AES
Plant Pathology - CAES - Description
- Thousand cankers disease is an emerging disease responsible for serious decline and death of ornamental eastern black walnut in Colorado and other western states, and the walnut species J. californica and J. hindsii in California. The fungal pathogen, Geosmithia morbida, that causes the disease is vectored by the walnut twig beetle, now found in California. The anticipated outcomes of this research project are a clear assessment of the susceptibility to TCD of Juglansspecies important to walnut breeding, rootstock production, and the walnut nut production industry; an understanding of stress factors that may influence host selection by WTB and symptom severity of TCD; and the distribution pattern of TCD in California orchards for understanding disease risk in relation to potential vector/inoculum sources.