Maize Lethal Necrosis: An Emerging, Synergistic Viral Disease

Author:

Redinbaugh Margaret G.12,Stewart Lucy R.12

Affiliation:

1. Department of Plant Pathology, Ohio State University, Wooster, Ohio 44691, USA;

2. United States Department of Agriculture, Agricultural Research Service, Wooster, Ohio 44691, USA;

Abstract

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. The coinfecting viruses act synergistically to result in frequent plant death or severely reduce or negligible yield. Over the past eight years, MLN has emerged in sub-Saharan East Africa, Southeast Asia, and South America, with large impacts on smallholder farmers. Factors associated with MLN emergence include multiple maize crops per year, the presence of maize thrips ( Frankliniella williamsi), and highly susceptible maize crops. Soil and seed transmission of MCMV may also play significant roles in development and perpetuation of MLN epidemics. Containment and control of MLN will likely require a multipronged approach, and more research is needed to identify and develop the best measures.

Publisher

Annual Reviews

Subject

Virology

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