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我省水稻黄矮病自1966年在浙南的文成、平阳等县初见发病后,病害逐年蔓延,为害不断加重。为配合探明其发病规律和防治关键,在1970—1971年我们曾对其病状和有关传染特性作了一些观察,现将初步结果简结于下,以供参考。一、病状水稻黄矮病病株的主要特征是矮缩、花叶和黄枯。病株矮缩,株形松散,叶片平展或下垂,前期病叶叶肉黄色杂有碎绿斑块;叶脉仍保持绿色,呈条状斑驳花叶,叶鞘仍为绿色,无明显病状。后期全叶枯黄卷缩,病株根系老朽短少,容易拔起。苗期发病,
Rice yellow dwarf disease in our province since 1966 in southern Zhejiang Wencheng, Pingyang County, the initial incidence, the disease spread year by year, increasing harm. In order to tie in with the determination of its pathogenesis and prevention and treatment of key, in 1970-1971 we have made some observations on their symptoms and related infectious features, the initial results are summarized below, for reference. First, the symptoms of rice yellow dwarf diseased plants are characterized by dwarf, mosaic and yellowish. Strain dwarf, loose plant shape, leaf flat or sagging, pre-disease leaves yellow mixed green broken plaque; vein remains green, strip mottled mosaic leaves, sheath is still green, no obvious symptoms. Full late curly yellow crooked, diseased roots lack of aging, easy to pull up. Seedling incidence,