. "761977" . "winter barley; barley yellow dwarf virus; symptomatical response; harmfulness"@en . "Vacke, Josef" . . . "CZ - \u010Cesk\u00E1 republika" . . . "\u0160korp\u00EDk, Miroslav" . . "Barley yellow dwarf virus harmfulness on winter barley crops infected at an early growth stage" . . "RIV/00027006:_____/98:00000005" . . . "[DA5F15064E2A]" . "P(GA521/97/0749)" . "RIV/00027006:_____/98:00000005!RIV/2000/GA0/M01000" . "27" . . "1212-1975" . . "Vacke, Josef" . "Czech Journal of Genetics and Plant Breeding" . "\u0160korp\u00EDk, Miroslav" . . "\u0160\u00EDp, V\u00E1clav" . "1" . "3"^^ . . "The harmfulness of barley yellow dwarf virus (BYDV) on winter barley was studied in small-plot field trials during 3 years. Plant were infected at the tillering stage with PAV strain of the virus using Rhopalosiphum padi aphids originating from greenhou se rearing. The results obtained showed that the cultivars Kamil, Kromir, Kromoz, Marinka, Marina and MOnaco (SH9) were the most severely affected winter barley cultivars. Infected plants of these cultivars failed to head either completely or partially, and failed to produce any grain yield. Infected plants of Borwina, Lunet, Luxor and Okal headed, but their grain yield were reduced by 96.4 to 99.4 %, thus they were also classified as very susceptible. The grain yield of the cultivar Kompolti 4 which classified as mildly susceptible (SH 6.8) was reduced by 62.1 %. Mild resistance was recorded only with the cultivars Sigra (SH 5) - the grain yield was reduced by 46.7 %." . "3"^^ . "3"^^ . "Barley yellow dwarf virus harmfulness on winter barley crops infected at an early growth stage" . "\u0160\u00EDp, V\u00E1clav" . "34" . "Barley yellow dwarf virus harmfulness on winter barley crops infected at an early growth stage"@en . . "The harmfulness of barley yellow dwarf virus (BYDV) on winter barley was studied in small-plot field trials during 3 years. Plant were infected at the tillering stage with PAV strain of the virus using Rhopalosiphum padi aphids originating from greenhou se rearing. The results obtained showed that the cultivars Kamil, Kromir, Kromoz, Marinka, Marina and MOnaco (SH9) were the most severely affected winter barley cultivars. Infected plants of these cultivars failed to head either completely or partially, and failed to produce any grain yield. Infected plants of Borwina, Lunet, Luxor and Okal headed, but their grain yield were reduced by 96.4 to 99.4 %, thus they were also classified as very susceptible. The grain yield of the cultivar Kompolti 4 which classified as mildly susceptible (SH 6.8) was reduced by 62.1 %. Mild resistance was recorded only with the cultivars Sigra (SH 5) - the grain yield was reduced by 46.7 %."@en . . "Barley yellow dwarf virus harmfulness on winter barley crops infected at an early growth stage"@en .