近两年我县水稻部分秧田发生了细菌性褐条病（经南京农大植保系鉴定），而且发生面积有扩大趋势。以前，这一病害在我县未曾发生过，我国北方稻区也未见报导．为此，我们对其进行了调查研究，现符该病症状特点、发生规律及防治措施简介如下：1症状特点该病主要发生于秧田稻苗3 Bacterial brown streak (identified by Nanjing Agricultural University Plant Protection Department) occurred in rice seedling fields in the recent two years, and the occurrence area has been expanding. In the past, this disease had never happened in our county and there was no report in the rice area in northern China. To this end, we conducted a survey of the disease, the symptoms of the disease are now features, the occurrence of the rules and prevention measures are as follows: 1 Symptoms The disease occurs mainly in rice seedlings 3