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Management of Bacterial Leaf Blight (BLB) of Rice

Xanthomonas oryzae pv. oryzae Bangla name: Dhaner pata pora, Kresek
  • Use balanced fertilizer
  • Avoid the use of excessive nitrogen. Split nitrogen applications
  • Avoid top dressing urea after wind, rain and hailstorms
  • Use two-thirds MOP at basal and apply the rest with the third top dress of urea
  • Burn infected crop residues after harvesting in severe cases
  • Use disease free seed (without spots)
  • Apply water before uprooting seedlings in seed bed
  • Use tray/nursery box seedling to avoid root injury
  • Additional relevant crops: grasses for BLB infection
  • Regular visits and observation of the rice plants
  • Wilting of leaves or plant as a whole at early planting to active tillering
  • The basal parts of Kresek-affected plants have a bad odour at the cut ends of stems when squeezed.
  • Dry lesions appear first at leaf tip or leaf edge and finally greenish yellow or yellowish stripes on advanced lesions are observed
  • Premature drying of leaves or blighted leaves occurs as the infection advances
  • High temperatures and humid conditions, windy weather, and rain or hailstorms favour BLB
  • Yellowish bacterial ooze coming out from stomata and hydathodes under/beneath the leaf
  • Apply additional 5 kg muriate of potash (MOP) per 33 decimal area if the disease symptoms are seen
  • Spraying of MOP @6g/L, Zn fertilizer @4g/L and elemental sulphur @6g/L during PI-boot stage. Spraying the same solution twice with a 7-day interval if symptoms appear naturally or after windy-rainy weather.
  • Drain out water and dry the field for 7-10 days if the crop is affected with kresek or bacterial blight
  • No bactericide is recommended
AUTHOR(S): Dr. Tahmid Hossain Ansari (BRRI), Dr. Sheikh Samiul Haque (BRRI), Md. Ashraf Uddin (DAE)

CREATED/UPDATED: 27-04-2016; updated October 2020
PRODUCED BY: Plantwise

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