水稻细条病是国内水稻检疫性病害。近年来已成为我处水稻生产的主要病害,且发病时间逐年提早,发病面积不断扩大,发病程度逐年加重。为了估测病害造成损失情况,我们连续两年进行了病害发病程度与损失关系的调查研究,现将结果初报如下:一、调查内容和方法:以汕优63为调查品种,分别在成熟期对未受害叶、倒一叶、倒二叶、倒三叶受害分级进行调查,其方法在同类型田按不同病级测产损失,按级各取样稻穗1000株室内考种,分别记载各级实粒数、空秕率、结实率、千粒重,并进行比较测定产量损失。 Rice sliver is a domestic quarantine disease of rice. In recent years, it has become the main disease of rice production in our department. The onset time is earlier and more gradually, and the incidence is increasing year by year. In order to estimate the damage caused by the disease, we carried out the investigation of the relationship between the disease severity and the loss for two consecutive years. The results are as follows: First, the content and method of the survey: Shanyou 63 as the investigated varieties, respectively, at maturity The investigation of unharmed leaves, inverted leaves, inverted two leaves and inverted three leaves affected by grading was carried out. The method was to measure the loss of production at different disease grades in the same type of field. Level of real particles, empty rate, seed setting rate, 1000-grain weight, and compare the determination of yield loss.