Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:15:26.9564120Z
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Rice bacterial leaf blight (418)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Widespread. Asia, Africa, North, South, Central America, Europe, Oceania. In Australia, Fiji.
  • Important disease of rice, causing regular epidemics. Wild grasses are hosts.
  • Bacteria enter natural openings and wounds, moving in water conducting tissues, causing streaks with wavy margins – yellowish-white (seedlings), pale yellow (older plants) - joining together, resulting in wilts, drying and death. Droplets ooze from streaks leaving crusts. Spread with irrigation water, wind and rain, possibly seed. Survival in seed, and weeds.
  • Biosecurity: import only bacteria-free certified seed, and subject to closed quarantine.
  • Cultural control: use certified seed, or select seed from healthy plants; do not clip seedling leaves; do not apply excessive N; ensure good drainage (flooding allows infection); weed (especially Leersia species); plough stubble after harvest; fallow fields to destroy bacteria; use resistant varieties - available in Africa and Asia.
  • Chemical control: not effective for this disease.

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