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Transmission of Barley Yellow Dwarf Virus by Different Stages of the Greenbug. B. E. Halstead, Graduate Student, Department of Plant Science, University of Manitoba; C. C. Gill, Research Scientist, Canada Department of Agriculture, Research Station, 25 Dafoe Rd., Winnipeg 19, Manitoba. Phytopathology 61:749-750. DOI: 10.1094/Phyto-61-749.

Two barley yellow dwarf virus isolates for which the aphid, Schizaphis graminum, was the only (isolate 6718) or the most efficient (isolate 6711) vector were transmitted more efficiently by nymphs of S. graminum than by adults. Persistence of isolate 6711 in the aphid was low. Schizaphis graminum nymphs also transmitted a nonspecific isolate (6515) more efficiently than adults.