Email this article Fungal pathogens associated with crown and collar rot of apple trees in southern Syria
Abstract
Crown and collar rot of apple trees is a destructive and widespread disease in most areas of the world. Surveys have been done to describe disease symptoms, estimate the disease incidence, and identify the pathogens associated with this disease in southern Syria. Disease incidence was 0.08 – 10 % in most studied sites, only in Alroom location it was up to 14.7 % in 2014 and 17.8 % in 2015, with average of 11.8 %. Symptoms included small pale green leaves, sparse foliage, and a reddish-brown discoloration of inner bark of the infected area at the base of infected tree. The isolated fungi belonged to genera and form genera Phytophthora, Rosellinia, Rhizoctonia, Phialophora, Acremonium, Pestalotiopsis, Cylindrocarpon and Verticillium. Phytophthora was isolated from all infected trees, and was the most frequent pathogen (53.7 % of total isolates). Phytophthora isolates recovered from crown cankers of apple were identified as P. cactorum (91.5 %) and P. cambivora (8.5 %). The results of this study are the first report of crown and collar root rot of apple in Syria.
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Brasier, C. (2008). Phytophthora biodiversity: How many Phytophthora species are there? Workshop on Phytophthoras in Forest and Natural Proceedings 4th IUFRO Ecosystems, Working party S07.02.09, Monterey, California, USA, pp. 101-115.
Braun, P. G. (1995). Effects of Cylindrocarpon and Pythium species on apple seedlings and potential role in apple replant disease. Can. J. Plant Pathol. 17:336-341. Doi: 10.1080/07060669509500672
Chamorro, M., Aguado, A. & Berta De los Santos. (2016). First Report of Root and Crown Rot Caused by Pestalotiopsis clavispora (Neopestalotiopsis clavispora) on Strawberry in Spain.
Ellis, M. A. (2008). Phytophthora root and crown rot of fruit trees. Ohio State University, Extension Fact Sheet HYG-3029-08.
Erwin, D. C. & Ribeiro, O. K. (1996). Phytophthora Diseases Worldwide. The American Phytopathological Society. St. Paul, MN.
Espinoza, J. G., Briceño, E. X., Keith, L. M. & Latorre, B. A. (2008). Canker and Twig Dieback of Blueberry Caused by Pestalotiopsis spp. and a Truncatella sp. in Chile. Plant Dis. 92, 1407-1414. Doi: 10.1094/PDIS-92-10-1407
Jeffers, S. N. & Aldwinckle, H. S. (1986). Seasonal variation in extent and colonization of two apple rootstock by five species of Phytophthora. Plant Dis. 70, 941–945. Doi: 10.1094/PD-70-941
Jeffers, S. N. & Aldwinckle, H. S. (1988). Phytophthora crown rot of apple tree, sources of inoculum of P. cactorum, and P. cambivora as primary inoculum. Phytopathology 78, 328-335. Doi: 10.1094/Phyto-78-328
Jeffers, S. N. & Wilcox, W. F. (1990). Phytophthora crown, collar, and root rots, p. 43-45, In: A.L. Jones and H.S. Aldwinckle (eds.). Compendium of apple and pear diseases. Amer. Phytopathol. Soc. Press, St. Paul, Minn.
Jeffers, S. N., Aldwinckle, H. S., Burr, T. J. & Arneson, P. A. (1981): Excised twig assay for the study of apple tree crown rot pathogens in vitro. Plant Disease, 65, 823–825. Doi: 10.1094/PD-65-823
Judelson, H. S. & Blanco, F. A. (2005). The spores of Phytophthora: weapons of the plants destroyer. Nature Reviews Microbiology, 3, 47-48. Doi: 10.1038/nrmicro1064
Hickey, K. D. & Yoder, K. S. (2001). Crown or Collar Rot, Phytophthora cactorum, Kearneyscille. Fruit Research and Education Center, West Virginia University.
Matheron, M. E., Young, D. J. & Matejka, J. C. (1988). Phytophthora root and crown rot of apple trees in Arizona. Plant Dis. 72. 481-484. Doi: 10.1094/PD-72-0481
Minter, D. W. & Cannon, P. F. (2015). International Mycological Institute (I.M.I.) Descriptions of Fungi and Bacteria. CABI. Pp.204.
Mazzola, M. (1998). Elucidation of the microbial complex having a causal role in the development of apple replant disease in Washington. Phytopathology, 88, 930-938. Doi: 10.1094/PHYTO.1998.88.9.930
Mazzola, M., Granatstein, D., Elfving, D. C., Mullinix, K. & Gu, Y. H. (2001). Cultural management of microbial community structure to enhance growth of apple in replant soils. Phytopathology, 91.
Nakova, M. B. (2003). Phytophthora root and crown rot of fruit trees in Bulgaria. Proceedings 3rd International Plant Protection Symposium: From Ideas to Implementation, Debrecen, Hungary. pp. 196-203.
Nakova, M. (2010). Phytophthora root and crown rot on apples in Bulgaria. Pestic. Phytomed.(Belgrade), 25, 43- 50. Doi: 10.2298/PIF1001043N
Oliveira, H., Nascimento, T. & Rego, M. C. (1998). Crown gall and Cylindrocarpon black-foot diseases of grapevine in Portugal. In: Proceedings of the 19th International Geisenheim Workshop on Grapevine Grafting, 2–4 July, 1998, Geisenheim, Germany, 23–34.
Teviotdale, B. L. & Grubler, W. D. (1999). UC Pest Management Guidelines, Apple – Phytophthora root and crown rot. UC DANR Publication 3339.
Thomidis, T., Elena, K. & Tsipouridis, C. (2002) Persistence of fungicidal activity of four fungicides applied to peach trunks to control Phytophthora crown rot. Journal of Plant Diseases and Protection, 109, 401-409.
Waterhouse, G. M. (1963). Key to the species of Phytophthora de Bary. Mycol. Pap. 92, 1-22
Waterhouse, G. M. (1970). The genus Phytophthora de Bary. Mycol. Pap. 122, 1-59.
Welsh, M. F. (2011). Studies of crown rot of apple trees. Canadian Journal of Research, 20, 457-490.
Wilcox, W. F. (1998). Phytophthora Root, Crown and Collar Rots Phytophthora spp. Fruit Focus USA,. www.phytophthoradb. org.
Wilcox, W. F. (1993). Incidence and Severity of Crown and Root Rots on Four Apple Rootstocks Following Exposure to Phytophthora Species and Waterlogging. J. Amer. Soc. Hort. Sci. 118, 63-67.
DOI: http://dx.doi.org/10.14720/aas.2017.109.1.10
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