Stem rust of wheat in colonial Australia and the development of the plant pathology profession

Abstract

Grain production in the early years of the British colonisation of Australia was characterised by a lack of expertise of farmers, a paucity of farm animals and equipment and the poor work ethics of convicts. In 1803, just when wheat production was increasing and becoming less risky, stem rust of wheat caused by the fungus Puccinia graminis f.sp. tritici was discovered by an exiled Irish rebel Joseph Holt, on Captain William Cox's Brush Farm. Stem rust became an intermittent and often serious disease culminating in a series of epidemics in the latter part of the nineteenth century. Growing varieties less prone to rust was a key recommendation from a series of rust-in-wheat conferences held from 1891 to 1896. It was William Farrer who was the first in Australia to develop new wheat varieties that resisted the ravages of rust principally by maturing earlier. The rust outbreaks were also catalysts for the New South Wales and Victorian governments to employ Australia's first plant pathologists, Nathan Cobb and Daniel McAlpine, respectively. A year later, Henry Tryon was employed by the Queensland government as its first vegetable pathologist, although he had conducted plant disease investigations as early as 1889.