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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
Monitoring
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
Direct Control
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
Direct Control
Restrictions
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
