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