Lack of Barley Yellow Dwarf Virus Dosage Effects on Virus Content in Cereals. M. Skaria, Graduate Research Assistant, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907. R. M. Lister, Professor, Department of Botany and Plant Pathology, and J. E. Foster, Associate Professor, Department of Entomology, and Research Entomologist USDA, ARS, Purdue University, West Lafayette, IN 47907. Plant Dis. 68:759-761. Accepted for publication 7 May 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-759.

No effects of inoculum dosage on symptoms or on virus content (as assessed by enzyme-linked immunosorbent assay) were observed in experiments with cultivars of wheat, oats, and barley inoculated with two PAV isolates of barley yellow dwarf virus (ie, nonspecifically transmitted by Rhopalosiphum padi and Sitobion avenae). Typically, virus contents peaked about 12 days after inoculation before declining but were similar at each sampling time during 1 mo after inoculation whether the plants had been infested with two or 10 aphids. Similarly, no significant differences were noted in symptoms or tissue weight between plants infested with two or 10 aphids.