EPPO Global Database

Geosmithia morbida(GEOHMO)

Distribution details in United States of America

Current pest situation evaluated by EPPO on the basis of information dated 2019: Present, restricted distribution
First recorded in: 1990s
From CABI Disease map 1158 (2014): Present, restricted distribution
EPPO Reporting Service (2014/002) : widespread branch dieback and mortality of Juglans nigra has been occurring in Western USA since the mid-1990s. In 2008, this mortality was determined to be the result of a combination of 2 pests: Geosmithia morbida and its insect vector (Pityophthorus juglandis). More recently, the thousand cankers disease has also been found in some states in the Eastern part of the USA.

EPPO Reporting Service (2019/189) : detected from different insect species, in several states including Illinois and Minnesota,
* Hadziabdic D, Windham M, Baird R, Vito L, Cheng Q, Grant J, Lambdin P, Wiggins G, Windham A, Merten P, Taylor G (2014) First report of Geosmithia morbida in North Carolina: the pathogen involved in Thousand cankers disease of black walnut. Plant Disease 98(7), 992-993.
------- Found in several black walnut trees in a forest setting in North Carolina (Great Smoky Mountains national park in Haywood county).

Thousand cankers disease. http://www.thousandcankers.com/media/images/TCD_Confirmed_State_Map_8_2013.png
------- Map of the distribution in the USA (9 states in the Western part - 5 in the Eastern part of the USA).

* Juzwik J, McDermott-Kubeczko M, Stewart TJ, Ginzel MD (2016) First report of Geosmithia morbida on Ambrosia beetles emerged from thousand cankers-diseased Juglans nigra in Ohio. Plant Disease 100(6), p 1238.

* 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.
------- First description.

* Luna EK, Sitz RA, Cranshaw WS, Tisserat NA (2013) The effect of temperature on survival of Pityophthorus juglandis (Coleoptera: Curculionidae). Environmental Entomology 42(5), 1085-1091.

* Moore M, Juzwik J, Miller F, Roberts L, Ginzel MD (2019) Detection of Geosmithia morbida on numerous insect species in four Eastern States. Plant Health Progress, 1–7. DOI: https://doi.org/10.1094/PHP-02-19-0016-RS

* Serdani M, Vlach JJ, Wallis KL, Zerillo M, McCleary T, Romero-Severson J, Tisserat NA (2013) First report of Geosmithia morbida and Pityophthorus juglandis causing thousand cankers disease in butternut. Plant Health Progress https://www.plantmanagementnetwork.org/php/elements/sum.aspx?id=10708&photo=6106
------- On butternut (Juglans cinerea).

* Tisserat N, Cranshaw W, Putnam ML, Pscheidt, Leslie CA, Murray M, Hoffman J, Barkley Y, Alexander K, Seybold SJ (2011) Thousand cankers disease is widespread in black walnut in the Western United States Plant Health Progress. http://www.fs.fed.us/psw/publications/seybold/psw_2010_seybold008(tisserat).pdf

* 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 in California.