水稻黄矮病和普矮病在我县发生普遍而且有逐年增多的趋势,这对水稻高产是个障碍。因此,我局测报站在1972—73年工作的基础上,1974年进行了发病规律和防治方法的研究。现将结果报导如下: 一、两种病毒病发生概况 1974年水稻病毒病发生,普矮重于黄矮,早稻重于晚稻。早稻黄矮最高病株率20.40％,平均3.59％;普矮最高株发病率44.1％,平均16.10％。病株率分别较1973年 Rice yellow dwarf disease and Pu dwarf disease occur in my county, and there is a trend of increasing year by year, which is an obstacle to high-yielding rice. Therefore, on the basis of the work of measuring station of our bureau in 1972-73, we carried out a study on the law of incidence and prevention and treatment in 1974. The results are reported as follows: First, the two virus disease incidence of 1974 cases of rice virus disease, Pu short weight in the yellow dwarf, early rice heavier than late rice. The highest rate of early rice yellow dwarf plant was 20.40%, an average of 3.59%; the highest incidence of general dwarf plant 44.1%, an average of 16.10%. The diseased plants were respectively compared with 1973