稻苗疫霉病(Phytophthora fragariaeVar.Oryzo—bladis)在我国最早见于1973年,在江苏省邗江县发生,以后浙、皖等省也有报道。近年来在豫南稻区也有发生,特别是低洼地和春季多阴雨之年更为严重。1985年以来,我们在信阳、潢川和商城等地,对此病作了初步调查研究。现将有关情况简报如下:一、发生情况信阳地区常年种植水稻450万亩,每年有秧田45万亩左右。据初步统计,稻苗疫霉病 Phytophthora fragariaeVar.Oryzo-bladis was first found in China in 1973 and occurred in Qijiang County of Jiangsu Province. Later, Zhejiang, Anhui and other provinces also reported. In recent years, rice fields in southern Henan have also occurred, especially in low-lying areas and spring more rainy years more serious. Since 1985, we have conducted a preliminary investigation into the disease in Xinyang, Huangchuan and Shangcheng. The relevant briefings are as follows: First, the occurrence of Xinyang region perennial planting 4.5 million mu of rice, 450,000 mu per year or so. According to preliminary statistics, rice seedling mold disease