Location: Corn, Soybean and Wheat Quality ResearchTitle: Maize lethal necrosis: Impact and disease management
Submitted to: Outlooks on Pest Management
Publication Type: Review Article
Publication Acceptance Date: 4/1/2022
Publication Date: 4/1/2022
Citation: Ohlson, E.W., Wilson, J.R. 2022. Maize lethal necrosis: Impact and disease management. Outlooks on Pest Management. 33(2):45-51(7). https://doi.org/10.1564/v33_apr_02.
Technical Abstract: Maize lethal necrosis (MLN) is a destructive synergistic virus disease of maize caused by Maize chlorotic mottle virus (MCMV) in combination with one of several viruses in the Potyviridae family. First reported in North America in 1977, MLN has spread to Africa, Asia, and South America where it has had a devastating impact. MLN causes severe chlorosis, necrosis, and eventual plant death, instigating severe yield losses. The causal viruses of MLN are transmitted between plants by arthropod vectors: MCMV is transmitted by thrips and chrysomelid beetles, whereas aphids or eriophyid mites transmit the possible co-infecting viruses in the Potyviridae. These viruses are also transmitted at low frequency through seed and soil. Effective MLN management approaches include developing and growing maize with improved tolerance, crop rotation, controlling arthropod vector populations, managing disease reservoirs, and reducing disease transmission and spread through seed and soil. Here, we summarize and explore MLN’s global impact, its causal viruses, their vectors, and disease management strategies.