Abstract :
An isolate of BYDV (BYDV-OC), from barley in Northwest
Italy with typical symptoms of yellowing and
dwarfing, was transmitted by Rhopalosiphum padi, Sitohion
fragariae. S. avenae, Melopolophium festucae, R.
maidis and M. dirhodum, but not by Mvzus persicae
or Schizaphis graminum. It reacted in DAS-ELISA with
monoclonal and polyclonal antisera to PAV, but not
with antibodies to MAV. RPV and RMV. A polyclonal
antiserum prepared to BYDV-OC did not react with
MAV-like, RPV-like, or RMV-like isolates of BYDV in
ELISA or in Western blots. The concentration of BYDVOC
in Avena hyzantina plants decreased from weeks 1 to
10 after inoculation, but the total virus content per plant
increased up to weeks 7 to 8, following the increase of
plant weight.
