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  2. Understanding and Preventing Seed Transmission of Maize Lethal Necrosis in Africa

Understanding and Preventing Seed Transmission of Maize Lethal Necrosis in Africa

The CIMMYT-led Understanding and Preventing Seed Transmission of Maize Lethal Necrosis (MLN) in Africa conducts research on the epidemiology of MLN in order to identify cost-effective options for controlling it.

The project works towards this goal by providing a technical foundation – including identification of effective and robust measures to control the spread and impact of MLN through seed – and generating better understanding of the epidemiology of MLN-causing viruses, especially the maize chlorotic mottle virus (MCMV).

The MLN disease in eastern Africa is caused by co-infection of maize plants by MCMV and any of the cereal viruses in the family Potyviridae. The emergence and rapid spread of the MLN disease in eastern Africa during 2012-2014 raised concerns about possible further expansion of the disease into other unaffected regions in sub-Saharan Africa, especially southern Africa and West Africa.