Author/Editor		Kus, Miloš; Ravnikar, Maja; Zadravec, Draga
Title		Virus rumene pritlikavosti ječmena (BYDV) na ozimnem ječmenu v Sloveniji
Translated title		Barley yellow dwarf virus on winter barley (Hordeum savitum) in Sloveina
Type		članek
Source		In: Maček J, editor. Zbornik predavanj in referatov 4. slovenskega posvetovanja o varstvu rastlin; 1999 mar 3-4; Portorož. Ljubljana: Društvo za varstvo rastlin Slovenije,
Publication year		1999
Volume		str. 305-10
Language		slo
Abstract		In the period 1993-1996 in easten Slovenia an extensive yellowing of lower leaves of winter barley was observed in early spring. This phenomenon, being suspected to be caused by viruses, initiated our two years investigation. A number of the most suspicious crops of winter barley were selected for visual observations and chemical analysis of soil samples. Serology (ELISA test) and electronmicroscopy were utilized to identify viruses. Detailed information on aphid-vector flight and migration were provided by actaphid at Ptuj. In both years the infection by barley yellow dwarf virus (BYDV) was demonstrated, but none by barley yellow mosaic virus (BYMV) and barley yellow stripe mosaic virus (BYSMV). There were detected two isolates from BYDV infected plants; PAV transmitted non specifically by Rhopalosiphum padi and Sitobion avenae, and RMV transmitted specifically by Rhopalosiphum maidis. The proportion of infected barley plants was small and was influenced by crop growth stage at the time of aphid migration. The autumn migration of main aphid vectors reached its peak before majority of crops emerged and young plants started to grow, or even before sawing. Besides this aphid migration in both years was poor. Consequently it was concluded that extensive yellowing of lower leaves of winter barley in early spring 1996 and 1997 was not caused by mass-infections by barley yellow dwarf or other viruses attacking barley.
Descriptors		APHIDS BARLEY PLANT VIRUSES DISEASE VECTORS ENZYME-LINKED IMMUNOSORBENT ASSAY MICROSCOPY, ELECTRON