Sydney, Australia
October 30, 32014
Wheat stem rust
The first sample of stem rust was received on the 30th April from a crop of Shephard barley near Tannymorel in Queensland. It was determined to be the Scabrum +Sr21 pathotype. Since then, stem rust has been sampled from trials in Roseworthy and Kingsford in South Australia.
Wheat leaf rust
Samples of wheat leaf rust have been received from across the eastern grains belt (Figure 1). So far all samples received from South Australia have included at least trace amounts of the new wheat leaf rust pathotype, 104-1,3,4,6,7,8,9,10,12+Lr37. Although widely distributed across South Australia, this pathotype has not yet been detected in other states. Other pathotypes of wheat leaf rust sampled from South Australia include 76-1,3,5,7,9,10,12+Lr37 and 104-1,2,3,(6),(7),11+Lr37.
No pathotypes have yet been determined for recently submitted samples from Inverleigh in Victoria or locations in southern New South Wales. The pathotypes 76-1,3,5,7,9,10,12,13+Lr37 and/or 76- 3,5,7,9,10,12,13+Lr37 have been present in all
samples received from northern New South Wales and southern Queensland.
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