Leaf sheath injection method was the most efficient method to study stem blight symptom caused by bacterial causal agent of bacterial panicle blight disease on seedling stage. At blooming stage to study panicle blight symptom by spraying bacterial suspension on spikelets was efficient method. Disease symptoms on rice varieties, Jasmine rice 105 and Supanburi 60 showed seedling and stem blight & seedling stage and panicle blight & dirty seed symptom on blooming stage. These evidences showed disease symptom as same as previous report of bacterial panicle blight disease caused by Burkholderia glumae (Chen, 2013).
Thai farmers grow several rice varieties. Different panicle blight symptoms were usually found in Thailand even caused by fungi or bacteria. The causal agents need to be identified for further control program. Once, this study found bacteria causing stem blight and panicle blight in Thailand. Epidemics study was necessary to investigate for control strategies.