{"id":349,"date":"2016-08-24T15:47:17","date_gmt":"2016-08-24T07:47:17","guid":{"rendered":"http:\/\/www.agrinoon.cn\/?p=349"},"modified":"2016-08-24T15:47:17","modified_gmt":"2016-08-24T07:47:17","slug":"philippine-researchers-addressing-the-threats-of-cassava-phytoplasma-disease","status":"publish","type":"post","link":"https:\/\/www.agrinoon.com\/agriculture\/2016\/08\/24\/philippine-researchers-addressing-the-threats-of-cassava-phytoplasma-disease\/","title":{"rendered":"Philippine researchers addressing the threats of cassava phytoplasma disease"},"content":{"rendered":"
\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Cassava phytoplasma disease (CPD) is a current serious threat to the country\u2019s cassava industry.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 When the plant is CPD-infected, it shows yellowing or reddening of leaves, shrinking of the internodes resulting in stunted growth, excessive multiplication of shoots, and production of smaller leaves, among other symptoms, until the plant eventually dies.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 CPD can reduce yield to about 50-70% when its symptoms appear four to six months after planting or during the middle of the growing season. Yield can be reduced to 100% when infection ensues during the first three months from planting.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Becoming prevalent and continuing to spread in several parts of the country, CPD threatens cassava supply amidst its high demand for food, feeds and industrial uses. Worse, it is also feared to decrease export volume to as much as 30% to the detriment of the country\u2019s 1.5 billion dollar cassava industry.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Addressing this concern, a group of researchers initiated the formulation of a management program to combat the disease through a research project, Management of Cassava Phytoplasma Disease: Survey, Diagnosis, Characterization, and Control, which is composed of three studies. Dr. Erlinda A.\u00a0Vasquez, Director of the Philippine Root Crop Research and Training Center (PhilRootcrops), based in the Visayas State University, Baybay, Leyte, leads the project.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 The first study, Survey of the Occurence and Incidence of CPD and Associated Insect Pest<\/em>, illustrated that Regions 1-13 and Autonomous Region for Muslim Mindanao showed high CPD susceptibility for three cassava varieties (\u2018KU-50,\u2019 \u2018Rayong 5,\u2019 and \u2018Rayong 72\u2019).<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 All planting materials from Bukidnon showed heavy CPD infection, which spread to areas where these are planted. Because of this, former Department of Agriculture (DA) Secretary Proceso J. Alcala imposed a quarantine memo order in Bukidnon in 2015.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 The second study, Detection, Diagnosis, and Characterization of CPD<\/em>, developed an improved protocol for Phytoplasma DNA extraction and PCR analyses. Of the 29 samples collected from Visayas and Mindanao subjected to PCR analysis, 16 were found positive to the infection.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Lastly, the third study, Screening and Evaluation of Antibiotic Solution and Resistance Inducers<\/em>, developed a modified DNA extraction protocol which provides quality DNAs considered important towards an effective diagnosis and characterization of the disease.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Results also showed that treatment of cassava cuttings for six hours in 100 ppm Streptomycin solution before planting was the most effective method in lowering mortality and increasing germination rate of cassava planting materials. The treatment using Streptomycin increased root yield (77-187%), dry matter (8-29%), and starch content (12-21%) of the cassava plant compared with the control, wherein only water was used.<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 The project is one of the finalists in the research category of the National Symposium on Agriculture, Aquatic and Natural Resources Research and Development (NSAARRD).<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Initiated by the Philippine Council for Agriculture, Aquatic and Natural Resources Research and Development of the Department of Science and Technology (DOST-PCAARRD), NSAARRD recognizes the outstanding contributions of individuals and institutions in improving the state of agri-aqua research and development in the country.<\/div>\n
<\/div>\n<\/div>\n
Source:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b>PCAARRD<\/div>\n","protected":false},"excerpt":{"rendered":"

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Cassava phytoplasma disease (CPD) is a current serious threat to the country\u2019s cassava industry. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 When the plant is CPD-infected, it shows yellowing or reddening of leaves, shrinking of the internodes resulting in stunted growth, excessive multiplication of shoots, and production of smaller leaves, among other… Continue reading Philippine researchers addressing the threats of cassava phytoplasma disease<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-349","post","type-post","status-publish","format-standard","hentry","category-industry-news","entry"],"yoast_head":"\nPhilippine researchers addressing the threats of cassava phytoplasma disease - agrinoon<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.agrinoon.com\/agriculture\/2016\/08\/24\/philippine-researchers-addressing-the-threats-of-cassava-phytoplasma-disease\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Philippine researchers addressing the threats of cassava phytoplasma disease - 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