EPPO Global Database

Geosmithia morbida(GEOHMO)

Distribution details in United States of America (California)

Current pest situation evaluated by EPPO on the basis of information dated 2014: Present, no details
First recorded in: 2008
From CABI Disease map 1158 (2014): Present, restricted distribution
First recorded in Northern California in Davis in June 2008. However, it has probably been there before. The disease has been confirmed from Los Angeles County in the south up to Sutter County in the north.
University of California Agriculture & Natural Resources. Thousand cankers disease and the walnut twig beetle in California (dated May 2010). http://www.ipm.ucdavis.edu/EXOTIC/thousandcankers.html#

* Kolarík M, Freeland E, Utley C, Tisserat N (2011) Geosmithia morbida sp. nov., a new phytopathogenic species living in symbiosis with the walnut twig beetle (Pityophthorus juglandis) on Juglans in USA. Mycologia 103(2), 325-332.

* Utley C, Nguyen T, Roubtsova T, Coggeshall M, Ford TM, Grauke LJ, Graves AD, Leslie CA, McKenna J, Woeste K, Yaghmour MA, Cranshaw W, Seybold SJ, Bostock RM, Tisserat N (2013) Susceptibility of walnut and hickory species to Geosmithia morbida. Plant Disease 97(5), 601-607.
------- On Juglans regia.

* Yaghmour MA, Nguyen TL, Roubtsova V, Hasey JK, Fichtner EJ, DeBuse C, Seybold SJ, Bostock RM (2014) First report of Geosmithia morbida on English walnut and its Paradox rootstock in California. Plant Disease 98(10), p 1441.
------- On Juglans regia (grafted on Paradox rootstock) in orchards.