近年来发生的大豆褐斑粒是由大豆感染大豆花叶病毒的黄斑株系和顶枯株系等所致。人工接种上述病毒证明了这一点。种子斑驳的严重度与植株发病的严重度有某种相关性。病株所结种子并不一定全部为褐斑粒。褐斑粒或病株所结无病状种子都可以传病,带毒种子产生疫苗的多少视环境条件、大豆品种及病毒的株系而异。 Soybean brown speckles occurred in recent years are caused by the soybean infected with the mosaic virus and macrophotropic strains of the top dead strain. This is evidenced by the artificial inoculation of the above viruses. Seed mottling severity and the severity of plant disease have some relevance. The diseased strains are not necessarily all brown spotted seeds. Brown spots or disease-free seedless disease-resistant seeds can be transmitted disease, vaccinated seed vaccine depends on the number of environmental conditions, soybean varieties and viruses vary strains.