The incidence of barley yellow dwarf viruses in wheat in Victoria

Abstract

Wheat crops from all major wheat-growing districts throughout Victoria were sampled during September 1984. Examination of pooled samples by enzyme-linked immunosorbent assay (ELISA) with an antiserum to a mixture of two barley yellow dwarf virus (BYDV) types ('V1') showed that 10 out of 26 crops were infected with BYDV and 3 out of 26 had a BYDV incidence greater than 10%. The overall loss in yield likely to result from BYDV was estimated at 2% with a far greater loss in some crops. Frozen-stored samples from four crops with high levels of BYDV were retested after one year with isolate-specific antisera. The results indicated that in these crops, PAV-related isolates were the most common, followed by RPV-related isolates.

Occurrence of barley yellow dwarf virus in cereals and grasses of the low‐rainfall wheatbelt of South Australia

“…(1990) in the southern part of Western Australia, where 29% of the cereal crops were found to be infected, incidences being lower than 2%. In Victoria (Sward & Lister, 1987), as in the south coastal region of Western Australia (Jones et ai., 1990), levels of infection were higher. Sward & Lister (1987) detected BYDV in ten of the 26 crops sampled.…”

“…In Victoria (Sward & Lister, 1987), as in the south coastal region of Western Australia (Jones et ai., 1990), levels of infection were higher. Sward & Lister (1987) detected BYDV in ten of the 26 crops sampled. In three of these crops the incidence was greater than 10%.…”

“…In Australia, barley yellow dwarf (BYD) was first reported by Smith (1957) in New South Wales on the basis of symptoms, and the presence of BYDV was confirmed by Butler et al (1960) through aphid transmission tests. During the last 10 years, the disease has been reported from Western Australia (McLean & Khan, 1983;Jones et al, 1990), New South Wales (Waterhouse & Helms, 1985), Tasmania (Guy era/., 1986(Guy era/., , 1987, Victoria (Sward & Lister, 1987) and Queensland (Greber, 1988). The state-wide average yield loss in wheat due to BYDV has been estimated to be 2% in Victoria (Smith & Sward, 1982, Sward & Lister, 1987.…”

“…During the last 10 years, the disease has been reported from Western Australia (McLean & Khan, 1983;Jones et al, 1990), New South Wales (Waterhouse & Helms, 1985), Tasmania (Guy era/., 1986(Guy era/., , 1987, Victoria (Sward & Lister, 1987) and Queensland (Greber, 1988). The state-wide average yield loss in wheat due to BYDV has been estimated to be 2% in Victoria (Smith & Sward, 1982, Sward & Lister, 1987. In Western Australia, McLean et al (1984) reported a yield divergence between two isogenic barley cultivars (one resistant, one susceptible) ranging from 21 to 81 %.…”

Evaluation of Chinese Triticeae for resistance to Barley Yellow Dwarf Virus (BYDV)

“…After 3 to 4 weeks growth, sap extracts were prepared from 0 .5 g samples of the youngest fully expanded leaves and assayed for virus content using ELISA . The double antibody sandwich ELISA technique for detecting BYDV has been described previously (Sward & Lister, 1987 ;Xin et al ., 1988) . Immuno-…”