Australasian Plant Pathology (1996) 25, 135-140
R.F. Park (1996)
Pathogenic specialisation of Puccinia graminis on winter cereals and grasses in Australia in 1990 and 1991
Australasian Plant Pathology 25 (2), 135-140
Abstract: Levels of stem rust on wheat, triticale, barley, rye and grasses were low during 1990 and 1991. In 1990, 46 samples of stem rust were received, from which 49 isolates were pathotyped. The Satu triticale pathotype 34-2,12,13 was most commonly isolated from samples collected in Queensland and northern New South Wales, while in southern New South Wales and Victoria and in South Australia the Oxley pathotype 343-1,2,3,5,6 was most prevalent. Pathotype 343-1,2,3,5,6,8,9, virulent on Festiguay (Sr30), was isolated at a low frequency in Victoria and South Australia. In Western Australia, the Oxley pathotype and an older pathotype, 34-2, were isolated frequently. Only one of the ten samples of stem rust collected in 1991 came from a commercial crop. This sample originated from barley and was identified as the non-wheat attacking 'scabrum' form of stem rust. Most (seven) samples came from Queensland, from which seven isolates of pathotype 343-1,2,3,5,6 and two of pathotype 34-2,12,13 were recovered. The remaining samples yielded single isolates of pathotypes 34-2,7,12,13 (northern New South Wales) and 343-1,2,3,5,6 (southern New South Wales and South Australia). The Festiguay pathotype 343-1,2,3,5,6,8,9 was not isolated during the 1991 survey period. Virulence was not detected for Sr22, Sr24, Sr26, Sr31, Sr32 or Sr35during the 1990 and 1991 survey periods.
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Link to article at publishers website
Database assignments for author(s): Robert F. Park
Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
surveys/sampling/distribution
