The two viruses of barley yellow mosaic(BaYMV) and barley mild mosaic virus (BaMMV) were detected by ELISA from barley plants with virus-like symptoms which were collected from 16 locations in southern Korea, during 1995 and 1996. Both viruses occurred in southern Korea. Barley plants at Chongdo and Koseong were infected with BaMMV, while those infected with BaYMV were at Kurye and Taegu. After sowing 50 barley cultivars at habitually infected fields in 10 locations, the susceptibility and resistance to BaYMV and BaMMV were screened with antiserum tests. The cultivars of Albori, Alchanbori, Daejinbori, Jokangbori, Milyangbori, Boeunkwamek, Naehanssalbori, Olssalbori, Weossalbori, Dusan 29 and Deogndohyangchonkwa showed positive reaction to BaYMV antiserum, while Saeolbori, Chalbori, Jinjukwa and Baegjinkwa showed positive reaction to BaMMV. Nonsankwa 1-6 and wheat cultivars of Chongkeymil, Dahongmil, Grumil, Urimil, Jochonhomil, Sinkeyhomil showed negative reactions to both viruses. The rest cultivars were infected both with BaYMV and BaMMV. Sap inoculations to barleyplants with the two viruses of BaYMV isolated in Haenam and BaMMV isolated at National Honam Agricultural Station, expressed lower infection rate than those grown in the virus-infected fields.
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