{"id":2484,"date":"2020-08-22T09:53:53","date_gmt":"2020-08-22T13:53:53","guid":{"rendered":"https:\/\/meleigi.com\/?p=2484"},"modified":"2020-09-07T12:55:41","modified_gmt":"2020-09-07T16:55:41","slug":"first-report-on-neck-rot-disease-of-date-palm-caused-by-chalara-paradoxa-in-saudi-arabia","status":"publish","type":"post","link":"https:\/\/meleigi.com\/en_US\/2020\/08\/22\/first-report-on-neck-rot-disease-of-date-palm-caused-by-chalara-paradoxa-in-saudi-arabia\/","title":{"rendered":"First report on neck rot disease of date palm caused by Chalara paradoxa in Saudi Arabia"},"content":{"rendered":"\n

First report of neck rot diseases of  date palm caused by Chalara paradoxa<\/em><\/strong> in Saudi Arabia<\/strong> .<\/p>\n\n\n\n

Mohamed A. El-Meleigi<\/p>\n\n\n\n

Plant Production and Protection Department, College of Agriculture and Veterinary Medicine, Qassim University, Burydah, Saudi Arabia. meleigi@hotmail.com<\/a><\/p>\n\n\n\n

Cold stressed date palm  ( Phoenix dactylifera<\/em> L.) trees were severely infected with Chalara paradoxa<\/em> leading to neck rot and bending of stem. Over four thousands mature date palm trees ( 15- 20 years old) were killed by the disease. Barhee variety was the most affected by the disease (82%)  , while 5-20% of the other varieties including  Succary , Khalas, and Wannana were killed by the disease. The appearance of diseases symptoms was preceded by out break of leaf spots and dieback of leaves  caused by Alternaria alternate<\/em>. Leaves of affected palms were severely spotted and dried prior to the occurrence of neck bending and stem collapses. The fungus Chalara  paradoxa<\/em> was readily isolated from leaves, stems and roots of all affected trees on homemade acidified Potato Dextrose Agar (APDA). C. paradoxa<\/em> is known to be a soilborne and causes  black scorch diseases of date palms in Saudi Arabia (Al-Rokibah et al<\/em>. 1998 & Molan et al<\/em>. 2004), but rarely seen to cause neck rot and bending of the stems. Severely affected date palm farms in Qassim region, Central Saudi Arabia were exposed to -10 C for two consecutive nights during January.  Although, C. paradoxa<\/em> was reported as an opportunist the affect salt stressed trees ( Al-Rokibah et al<\/em>. 1998 & Suleman et al<\/em>. 2001 b). This is the first report on the effect of cold stress on promoting neck rot of date palm.. Neck pending disease of date palm caused by C. paradoxa <\/em>was previously reported in Iraq (Abbas et al<\/em>. 1992), in Qatar (Abbas and Abdullah 2003) and in Kuwait (Suleman et al<\/em>. 2001 a). <\/p>\n\n\n\n

References<\/p>\n\n\n\n

Abbas, E.H. and A.S. Abdulla, 2003. First report of neck banding disease on date palm in Qatar. Plant Pathol., 52: 790-790.<\/p>\n\n\n\n

Al-Rokibah, A.A., M.Y. Abdalla and Y.M. El-Fakharani, 1998. Effect of water salinity on Thielaviopsis paradoxa <\/em>and growth of date palm seedlings. J. King Saud Univ. Agric. Sci., 10: 55-63.<\/p>\n\n\n\n

Molan, Y.Y., R.S. Al-Obeed, M.M. Harhash and S. El-Husseini, 2004. Decline of data palm offshoots infected with chalara paradoxa<\/em> in Riyadh region. J. King Saud Univ., 16: 79-86.ase Reports 7, 12.<\/p>\n\n\n\n

Suleman P, Al-Musallam A, Menezes CA, 2001a. Incidence and severity of black scorch on date palms in Kuwait. Kuwait Journal of Science and Engineering<\/em> 28<\/strong>, 161-170.<\/p>\n\n\n\n

Suleman P, Al-Musallam A, Menezes CA, 2001b. The effect of solute potential and water stress on black scorch caused by Chalara paradoxa <\/em>and Chalara radiciola<\/em> on date palms. Plant Disease<\/em> 85<\/strong>, 80-83.<\/p>\n\n\n\n

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Chalara paradoxa (<\/figcaption><\/figure><\/div>\n\n\n\n
\"Neck
Neck Rot Disease of Date Palm in Saudi Arabia<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

First report of neck rot diseases of  date palm caused by Chalara paradoxa in Saudi Arabia . Mohamed A. El-Meleigi Plant Production and Protection Department, College of Agriculture and Veterinary Medicine, Qassim University, Burydah, Saudi Arabia. meleigi@hotmail.com Cold stressed date palm  ( Phoenix dactylifera L.) trees were severely infected with Chalara paradoxa leading to neck rot and bending of stem. Over four thousands mature date …<\/p>\n","protected":false},"author":2,"featured_media":2498,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,13,5,4],"tags":[58,536],"class_list":["post-2484","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-20","category-13","category-pc","category-pd","tag-black-scorch","tag-chalara-paradoxa"],"_links":{"self":[{"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/posts\/2484","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/comments?post=2484"}],"version-history":[{"count":8,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/posts\/2484\/revisions"}],"predecessor-version":[{"id":2513,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/posts\/2484\/revisions\/2513"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/media\/2498"}],"wp:attachment":[{"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/media?parent=2484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/categories?post=2484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/meleigi.com\/en_US\/wp-json\/wp\/v2\/tags?post=2484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}