PFS Seminar by Professor David Guest

15 March 2012

Management of Phytophthora diseases of jackfruit and durian

Jackfruit and durian are high-value crops marketed as 'flagship fruit' for the Eastern Visayas and Mindanao regions of the Philippines. Both fruits have the potential to provide sustainable incomes for local farmers through domestic, and potentially, export markets.

The major constraint to durian production is canker and fruit rot caused by the soilborne oomycete Phytophthora palmivora. A disease survey conducted at the start of this project showed that up to 95% of jackfruit trees were affected by a similar, but undiagnosed, decline syndrome that we identified to be also caused by Phytophthora palmivora. We identified infected nursery stock, poor soil and water management, poor farm hygiene and insects as the main drivers of disease.

A series of participatory action research trials were established and run by industry stakeholders to evaluate potential disease management strategies. Improved nursery practices (such as raised benches and clean potting medium) were implemented to produce disease-free planting material, and a nursery accreditation scheme is now being initiated. Low-, medium- and high-level management options have been designed for adoption by growers with a range of backgrounds, resources and technical capacities. Cost-benefit analyses for each option are used to promote adoption, along with farmer field days and training by extension and local government staff.

Chaired by Ass. Prof Robyn McConchie

Time: 15.45 Afternoon tea, 16.05 Seminar start

Location: Room 422, Biomedical Building, ATP

Contact: Dr Tom Roberts

Phone: 02 8627 1042

Email: 005b563555046d473721281d211f063c312d240c00690e5d036b2b45