自 90年代以来 ,水稻黑条矮缩病在本地发病面积不断扩大 ,为害逐年加重 ,据统计 1 999年 ,全台州地区发病面积已达到 1 .33万 hm2。其中以连作晚稻发病最重 ,一般发病田块丛发病率为 1 0 %～30 % ,严重的达 30 %～ 80 % ,最重的田丘丛发病率达 95%以上。业已成为当前威胁我市水 Since the 1990s, the incidence of rice black-streaked dwarf disease has been continuously expanding in the country and the harm has been increasing year by year. According to the statistics in 1999, the incidence of the disease in the entire Taizhou area has reached 13.3 thousand hm2. Among them, the incidence of continuous cropping late rice was the heaviest, and the incidence rate of common disease was 10% -30%, severe 30% -80%, and the heaviest incidence of Hilly plexus was 95%. Has become the current threat to our city water