The BSES yield decline program: foundational research into soil factors affecting root health in the Australian sugarcane industry

The loss of productivity associated with continuous sugarcane monoculture has long been recognised in the Australian sugarcane industry, but a lack of industry focus meant that little work was undertaken in earlier days to explore the causal factors. This situation changed with the development of a major root rot complex in far north Queensland, which was associated with the widespread cultivation of the productive variety Q90. Widespread stool tipping, poor yields, and associated poor root growth with pronounced rotting of the primary roots led to a sharp industry response. Resources were mobilised, external experts engaged, and a research program was developed seeking to identify the most important factors involved. This paper outlines the research conducted by BSES and the main industry outcomes resulting.