Completed project
Determining the extent and causes of abnormal vertical growth (MC15011)
Publication date: May 24, 2018
Delivery Partner: The University of Queensland
This project looked at the current impact of abnormal vertical growth (AVG) on the macadamia industry, as well as potential causes of the development and spread of the disorder.
Some top-level findings of the research include that:
Regarding the development of AVG, though initial observations suggested a role of geminivirus in the progression of the disorder, molecular analysis revealed no clear evidence of an association between the two. There remains, however, scope for further work to understand the role of bacteria and fungi found in samples.
This project was a strategic levy investment in the Hort Innovation Macadamia Fund
© 2026 Horticulture Innovation Australia Limited.
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