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A New Mosaic Disease of Corn. C. W. Boothroyd, Professor, Department of Plant Pathology, Cornell University, Ithaca, NY 14853. H. W. Israel, Senior Research Associate, Department of Plant Pathology, Cornell University, Ithaca, NY 14853. Plant Dis. 64:218-219. Accepted for publication 13 November 1979. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-218.

Severe stunting and mosaic of field-grown dent and sweet corn (Zea mays) were found in nine counties in New York in June and July 1979. Chlorotic white lines (12 mm × 12 cm) in and along veinal tissue occurred in the mosaic pattern of most of the leaves, suggesting the name white line mosaic. Isometric viruslike particles about 35 nm in diameter were recovered from diseased leaves, roots, and silks. Provisionally, this mosaic is believed to be dissimilar from any known virus disease of corn in the United States.