Occurrence of viruses of the familyLuteoviridaeon maize and some annual weed grasses in the Czech Republic

Abstract

The occurrence of virus of the family Luteoviridae on maize and annual grasses was studied in the south region of the Czech Republic during three years. On maize and annual weed grasses no BYDV-MAV and CYDV-RPV pathogens were found in test samples. Out of 246 maize samples taken, BYDV-PAV was found in 50 of them. The occurrence of this pathogen on maize varied with the locality and the year of sampling. In the test annual weed grasses BYDV-PAV was found in Echinochloa crus-galii, Setaria pumila and Phalaris canariensis plants. The occurrence of this pathogen was also dependent on the locality and the year of sampling. This pathogen was not found in Setaria viridis .The present results suggest that maize and some species of annual weed grasses in the territory of southern Moravia may serve as a major source of BYDV-PAV for winter cereals because these species are a „green bridge“ for this virus species