The team also used radios and television shows to channel information. The double infection of the two viruses gives rise to what The major biotic causes of stress in maize include Striga a parasitic weed, insect pest, diseases mainly northern corn leaf blight, maize lethal necrosis (MLN), Maize streak virus (MSV), and common leaf rust, gray leaf spot (GLS), stalk and ear rot. NARO Secretariat, 13 Lugard Avenue, P.O. Through use of various channels to reach stakeholders along the value chain, CABI disseminated information on the threat of the disease and ways to manage it. Plant Microbiology - Viral Diseases : FACT SHEET NO. The disease was first reported in Bomet county in 2011 in Bomet before spreading to other maize-growing regions. We also produced a mini video on the project for use online which covered the annual review and planning meeting. Sign up to receive the latest news, information, updates and offers from CABI. However, the observed symptoms were more severe than commonly associated with MCMV, suggesting the presence of maize lethal necrosis (MLN), a disease that results from maize infection with both MCMV and a potyvirus (4). [email protected]. Knowledge is power! Home / Projects / Managing Maize lethal necrosis disease in eastern and central Africa. beans, faba bean, chickpea etc.) for at least 2-3 years/seasons and removing alternate hosts including, sorghum, grasses, millet, wheat, oats, sudan grass. The most commons are the potyvirus Sugarcane Mosaic Virus (SCMV), Maize Dwarf Mosaic Virus () or the tritimovirus Wheat Streak Mosaic Virus (WSMV). Maize lethal necrosis disease (MLND) negatively affects maize crops and their seeds and is threatening food and economic security in East and Central Africa. A serious disease outbreak in Kenya, later diagnosed as maize lethal necrosis, was first reported in September 2011 in the Longisa division of the Bomet district. Environmental Impact. Viruses involved in maize lethal necrosis disease Maize lethal necrosis disease symptoms (Photo la and Photo 1b) is caused by the synergistic co-infection of maize with maize chloro- tic mottle virus symptoms (Photo 2) and any virus from the family Potyviridae, these include wheat streak mosaic virus, maize dwarf An intensive multi-disciplinary and multi-institutional strategy is being implemented to curb the spread of MLN in … Presentation during IITA R4D week 2015 (23 - 27 Nov. 2015). Partners of the CABI-led programme, Plantwise recommend where possible using certified, disease-free seed. For production and use of clean certified MCMV disease free maize seeds . Maize Lethal Necrosis Disease (MLN Disease, MLND, Corn Lethal Necrosis) is a disease affecting maize (corn) chiefly in East Africa. 8:51. The disease is difficult to control for two reasons: It is caused by a combination of two viruses that are dif Box 295. We trained over 84 extension staff, local administrators and researchers in packaging and disseminating information. Plantwise and partners also recommend rotating with non-cereal crops (e.g. They also recommend not moving infected maize plants and seeds to disease-free areas. Plant maize at the onset of the main rainy season, rather than during the short rain season; this creates a break between maize crops and interrupts the disease cycle; Weed fields regularly to eliminate alternate hosts for insect vectors. Maize is planted by a large number of farmers so the increased use of pesticides in the production of maize may have a negative impact on the environment. The coinfecting viruses act synergistically to result in frequent plant death or severely reduce or negligible yield. The project on ‘Preventing Seed Transmission of Maize Lethal Necrosis in Africa’ aims to generate a better understanding of these epidemiological issues to allow for more effective control of MCMV transmission through commercial seed, support the development of effective, evidence-based phytosanitary regulations, reduce MLN disease pressure in eastern Africa, and curb the spread to non … “There has been a tremendous progress in research of an alternative maize crop disease control since the establishment of MLN screening facility back in September 2011 when we collaborated with KALRO to put up the research facility in Naivasha. Passing through two further sets of safety doors, she arrives at the greenhouse where several hundred young maize plants await inoculation. Symptoms similar to MLN were reported in Uganda, Tanzania, South Sudan and Ethiopia. The Maize Lethal Necrosis Disease (MLND) is a result of a combination of two viruses, the Maize Chlorotic Mottle Virus (MCMoV) and any of the cereal viruses in the Potyviridae group, like the Sugarcane Mosaic Virus (SCMV), Wheat Streak Mosaic Virus (WSMV) or Maize Dwarf Mosaic Virus (MDMV). Avoid visiting your maize ˜eld once in contact with any Rotate maize with non-cereal crops such as sweet potato or beans for a period of 2-3 seasons if MLND had attacked your or neighbouring fields; Do not plant maize near fields with infested maize as the disease will spread into your field; Avoid movement of green maize from infected areas to disease-free … ò MAIZE LETHAL NECROSIS HISTORY In September 2011, a disease outbreak in Kenya was positively identified as Maize Lethal Necrosis Disease (MLND). To reduce instances and severity of the disease and its spread the team sought to increase and achieve equitable access and use of technologies, innovations, management practices and knowledge of disease management. Entebbe, Uganda, Association for Strengthening Agricultural Research in Eastern and Central Africa (ASARECA), National Agricultural Research Institutes from the respective project countries, International Maize and Wheat Improvement Centre (CIMMYT), CABI is a member of:  The Association of International Research and Development Centers for Agriculture. An intensive multi-disciplinary and multi-institutional strategy is being implemented to curb the spread of MLN in sub-Saharan Africa, and mitigate the impact of the disease. Five live radio talk shows, three recorded radio programmes and one recorded TV news item were broadcast in Kenya, Tanzania and Uganda. MLN is a new disease … Maize Lethal Necrosis Disease (MLND) diagnostic solutions. Maize lethal necrosis (MLN) is a severe disease affecting corn. (Photo: George Mahuku/CIMMYT) This announcement by Dr. L. M. Suresh was originally published on the Maize Lethal Necrosi s Information Portal of the International Maize and Wheat Improvement Center (CIMMYT) . Highlights Maize lethal necrosis (MLN) emerged as a serious threat to maize production and livelihoods of smallholders in eastern Africa since 2011. By 2012, symptoms consistent with maize lethal necrosis were observed in a number of districts in the Central, Nyanza, Western and Rift Valley provinces of Kenya. In addition, four print media articles on the problems and management of the disease were published in national newspapers in Uganda and Kenya, including; ‘Seeds of Gold’ in both countries, ‘Harvest Money’ magazine and ‘New Vision’. Crop rotation: Grow non-maize crop like legumes after the maize crop to avoid regular MLN host. Maize lethal necrosis (MLN) is a disease of maize caused by coinfection of maize with maize chlorotic mottle virus (MCMV) and one of several viruses from the Potyviridae, such as sugarcane mosaic virus, maize dwarf mosaic virus, Johnsongrass mosaic virus or wheat streak mosaic virus. Maize Lethal Necrosis Disease in East Africa - Duration: 8:51. This contributed to increased maize productivity in the region and hence improved food security and income. Maize lethal necrosis (MLN) is a disease of maize caused by the combination of Maize chlorotic mottle virus (MCMV) and a virus belonging to the potyviridae family. In the Biosafety Laboratory at CIMMYT headquarters, El Batán, Monica Mezzalama cuts up some MLN-infected maize leaves and crushes them into a buffer solution. If you would like to, you can learn more about the cookies we use, Develop and disseminate Maize lethal necrosis  resistant/ tolerant maize varieties that were adaptable to eastern Africa, Validate and disseminate proven MLND technologies, innovations and management practices in an integrated way to prevent the spread, Enhance the knowledge base on MLND viruses and the epidemiology of the disease in eastern Africa, Facilitate policy and economic analyses and advocacy to guide viable, equitable and gender responsive management interventions, Strengthen regional capacity for innovation to prevent and control Maize lethal necrosis. Top of page. All these trait-associated markers have been validated in biparental populations. A new challenge for maize scientists in East Africa. We also disseminated MLNDs information through 82 plant health rallies in over 20 districts and provinces throughout Burundi, Kenya, Rwanda, Tanzania and Uganda which reached over 11,635 farmers, traders, community leaders and agro-dealers (5,241 men, 3,921 women and 2,473 youth and children). •. Case Study 2: Maize Lethal Necrosis Disease (MLND) Possible solutions: A government or agricultural industry task force can help provide surveillance and workshops to educate farmers so they can identify the problem early on. Maize lethal necrosis disease (MLND) negatively affects maize crops and their seeds and is threatening food and economic security in East and Central Africa. Maize Lethal Necrosis disease (MLND) is a key regional and transboundary challenge that continues to bring havoc to farmers’ maize grain harvest and threatens food security in the eastern African region. Continuing to use www.cabi.org means you agree to our use of cookies. 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