【摘要】 东北地区发生的大豆病毒病,其症状主要为黄斑花叶、顶枯、皱缩花叶及卷叶等类型。根据对50个毒株测定的结果,这些病害的病原均属于大豆花叶病毒（SMV）,但由于它们所引起的症状不同,可认为是三个不同的株系,即黄斑株系（SMV—Y,引起黄斑花叶和皱缩）、顶枯株系（SMV—T,引起顶枯）和卷叶株系（SMV—C,引起卷叶）。三个株系都由种子带毒传病,田间可由大豆蚜传染,属口针带毒型,只能系统侵染大豆及秣食豆,在菜豆品种家雀蛋上形成局部斑,不能侵染豇豆、眉豆、豌豆、普通烟、苋色藜等,在多种其他菜豆品种上无症。SMV—Y 的稳定性较低,失毒温度为50°～55℃,稀释限点为10^-2,体外保毒期为12小时至两天,病毒粒体为线状。更多还原

【Abstract】 The major types of virus diseases of soybean occurred in the Nor- th-East China are yellow mottling,top necrosis,rugosity and leaf curl etc.From the results of identification of 50 isolates,it was demonstra- ted that the diseases were mainly caused by different strains of soy- bean mosaic virus,namely SMV-Y,SMV-T and SMV-C They were tran- smitted by sap easily,and by Aphis glycines and seeds also.They may infect soybean and Glycine gracilis systemically,and induce local lesions on bean variety Jia—qiao—dan,but may not infect other speices of Leguminosae or other families.The DEP was 10^-2,TIP was 50—55℃. and LIV was 12 hours to 2 days.The virus particles were flexous rods about 1000nm.long.There were cross-protection reactions between SMV-Y and SMV-T.更多还原