Completed project
Exploring alternatives for managing Phytophthora root rot in avocados (AV13021)
Publication date: June 15, 2017
Delivery Partner: The University of Queensland
This project, which ran from 2014 to 2017, sought to find out if two treatments, mandipropamid and potassium silicate, reduce Phytophthora root rot in avocados.
Researchers ran laboratory trials of mandipropamid as well as glasshouse trials where it was compared to standard treatment, granular metalaxyl.
Potassium silicate (Agsil drench, spray and injection) was evaluated in field trials to seek evidence of effectiveness against Phytophthora root rot in avocados.
The key findings were…
The team recommended further field trials to evaluate efficacy of mandipropamid and other new chemistries for improving health and productivity of trees declining from severe phytophthora root rot. They also recommended evaluation of Agsil and other available silicon products compared with existing grower standard practice.
This project was a strategic levy investment in the Hort Innovation Avocado Fund
© 2026 Horticulture Innovation Australia Limited.
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