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Bacterial Panicle Blight

Bacterial Panicle Blight

Burkholderia spp.


In a Nutshell

    Bacteria affect development and filling of grain after floweringStems below panicles remain greenGrains develop a light- to medium-brown discoloration of the lower third to half of the hullsGrains may later turn greyish, black or pink as other organisms become established in the hulls

Hosts: %1$s

· Rice


In the fields it tends to develop in circular patterns. Small clusters of panicles do not develop properly during grain fill and the panicles remain upright rather than bending down with the weight of the grain. Infected grains can be unevenly distributed on the panicle. The stem below an infected panicle remains green. Bacteria infect the developing grains at flowering and cause grain abortion or rotting during grain filling after pollination. Grains develop a light- to medium-brown discoloration of the lower third to half of the hulls. These grains may later turn greyish, black or pink as other bacteria or fungi become established in the hulls.


Bacterial panicle blight is seed transmitted. There are no practical control options if infected rice is planted.The spread of the disease is temperature-dependent. Bacterial panicle blight tends to develop during hot, dry weather at later stages of the plant growth. Prevalence increases when daytime temperatures are above 32°C time temperatures remain around 25°C or above. High nitrogen levels also favour the development of the disease. Rice planted earlier in the spring tends to have less damage from bacterial panicle blight because of cooler temperatures at heading and grain filling.

Biological Control

Sorry, we don't know of any alternative treatment against Burkholderia spp. . Please get in touch with us in case you know of something that might help to fight this disease. Looking forward hearing from you.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available.

Preventive Measures

    Make sure that the seeds follow the standards of quality requiredMonitor the crop regularly and check for sick plantsPlant the crop earlier in the springControl your fertilization program and do not exceed the recommended doses