Yield Loss in Sweet Corn Correlated with Time of Inoculation with Maize Dwarf Mosaic Virus. M. A. Mikel, Graduate Research Assistant, Department of Plant Pathology, University of Illinois, Urbana 61801. Cleora J. D'Arcy, Assistant Professor, Department of Plant Pathology, A. M. Rhodes, Professor, Department of Horticulture, and R. E. Ford, Professor and Head, Department of Plant Pathology, University of Illinois, Urbana 61801. Plant Dis. 65:902-904. Accepted for publication 22 March 1981. Copyright 1981 American Phytopathological Society. DOI: 10.1094/PD-65-902.

The effect on sweet corn yield of inoculation with maize dwarf mosaic virus strains A and B at the three-leaf stage, eight-leaf stage, or just before silking was tested at Urbana and Dixon Springs, IL. Early infection delayed maturity and reduced kernel fill at the basal portion of the ear, ear length, ear diameter, ear weight, number of second ears, and plant height. Little difference was found between plants inoculated last and the uninoculated control.