PGRFA

  • Increase font size
  • Default font size
  • Decrease font size
The Disease:  BACTERIAL LEAF STREAK
Pathogen:
Xanthomonas oryzae pv oryzicola (Fang, Ren, Chen, Chu, Faan & Wu) Dye (Dye 1978)

Etymology: from Greek xanthus yellow; monas, unit; oryza rice
Disease:
Bacterial leaf streak is widespread in tropical Asia.
Symptoms:
Translucent interveinal streaks of various length appear on the leaves. Yellowish droplets of bacterial ooze may be seen over the lesions under humid conditions. When dry, the ooze looks like small beads. Windborne beads then infect healthy leaves. Old lesions become light brown. A yellow halo may appear around the lesions in susceptible varieties.

At advanced stages of the disease, the leaves turn brown and die. Necrotic lesions become covered by saprophytic organisms. At this point, it is difficult to distinguish the symptoms of bacterial leaf streak from those of bacterial leaf blight. 
EPPO Links

Appearance:

Bacterial leaf streak c
Last Updated on Thursday, 09 July 2009 05:58