Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:14:55.4154351Z
   2
Passionfruit Phytophthora rot (154)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. On passionfruit, cultivated and wild. Note, this is the same fungus that causes a similar disease on tomato (root rot, and a firm dark fruit rot; see Fact Sheet no. 157), and also attacks capsicum, citrus (see Fact Sheet no. 264), papaya (see Fact Sheet no. 152), pineapple, and tobacco.
  • A water mould, an oomycete, not a fungus.
  • A blight of young leaves, brown spots on older ones, rots on fruits and vines; root decay causing wilts.
  • Spread by rain splash from spores in the soil; long distance spread is on wind-driven rain, and perhaps on nursery plants.
  • Cultural control: yellow variety rootstocks with graft 30 cm above soil; avoid planting in poorly drained land; prune to aid air circulation and drying; grass barriers to stop rain-splash; collect trash and burn after harvest.
  • Chemical control: copper or mancozeb (protectants); or phosphorous acid (systemic).

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