Bondi Junction NSW, Australia
Fact Sheets
Breadfruit Phytophthora fruit rot (130)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds


  • Worldwide distribution. On breadfruit, but also cocoa and coconut, papaya, rubber, and many more. An important disease.
  • A water mould, an oomycete, not a fungus. Spores are splashed by rain from soil onto lower fruit; later, spores on fruit spread in wind-driven rain. The spores are lemon shaped, and can be seen with a lens.
  • Cultural control: prune lower branches to prevent fruit infection; 'top' trees starting when young, keeping them between 3-4 m to facilitate management of the disease; apply mulch to prevent rain splash of spores onto lower fruit; avoid susceptible varieties (e.g., Puou in Samoa).
  •  Chemical control: protectants - copper, chlorothalonil, mancozeb; systemics – metalaxyl, phosphorous acid.

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