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稻苗疫霉病是水稻的一种新病害,1974年我县部分地方的中稻秧苗上曾出现过,此后只零星发生。1978年和1979年,该县早稻和中稻秧田普遍发生此病,而且危害相当严重。如1978年4月24日调查,官埠公社向阳大队4队有6.3亩连片先锋1号秧田发病,株发病率高达100％,个别严重田块造成死苗。又如1979年5月10日调查,西河公社北洪大队2队的691、神奇、文胜糯等中稻秧田普遍发病,株发病率达100％,其中以文胜糯秧田发病最重,叶片全部发病,严重的全株死亡。秧苗疫霉病已逐渐成为我县早、中稻苗期重要病害之一。据浙江农业大学报道,此病在江苏、安徽、浙江、湖南等省的部分稻区均有发生。
Phytophthora infantile disease is a new disease of rice. In 1974, the rice seedlings of some places in our county had appeared and then only sporadically occurred. In 1978 and 1979, the disease occurred frequently in the early rice and mid-rice seedling fields in the county, and the damage was quite serious. As of April 24, 1978 survey, the official port commune Xiangyang Brigade 4 teams have 6.3 acres of Pioneer No. 1 seedling incidence, the highest incidence of strains up to 100% of the individual serious field caused dead seedlings. Another example is the May 10, 1979 survey, Xihong commune Beihong Brigade 2 teams 691, magical, Wensheng glutinous rice and other common incidence of medium-sized rice seedling, strain incidence of 100%, of which Wensheng waxy seedling incidence most, leaves all Disease, severe whole plant death. Phytophthora blight has gradually become one of the most important diseases of seedling stage in our county. According to Zhejiang Agricultural University, the disease occurred in some rice areas in Jiangsu, Anhui, Zhejiang and Hunan provinces.