Rice bacterial brown streak, which occurred at seedling stage and caused by Pseudomonas panici Stapp, is a new type of rice diseases discovered in the north of China.There were three types of symptom, including black brown streak in the first leaf, leaf sheath went yellow brown and midrib brown streak or irregular streak on the wound by insect.There was not bacterial ooze in the diseased position.The results of screening of chemicals in lab showed that the growth of Pseudomonas panici Stapp was obviously inhibited by using triadimefon+thiran, benziothia-zolinone and amobam.