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Corn lethal necrosis - a new virus disease of corn in Kansas.


The new disease was identified in Kans. in 1976. It is caused by the synergistic interaction of maize chlorotic mottle virus with either maize dwarf mosaic virus or wheat streak virus. This is the first report of MCMV outside Peru. Both the Peru and Kans. strs. of MCMV were purified. Both contained isometric particles c. 30 nm diam., sedimenting at c. 109S. The strs. are serologically distinguishable. Resistance to maize lethal necrosis has been identified in some maize hybrids and inbreds in glasshouse tests.<new para>ADDITIONAL ABSTRACT:<new para>Of 15 inbreds and five hybrids of maize inoculated under greenhouse conditions, the hybrid Mo17 X Oh509A was the most resistant, showing only a mild mosaic.