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一、大豆病毒病分布于日本各地的大豆病毒病病原体,已查明的有9种,其中为害最大的有3种,即花叶病、萎缩病和矮化病。 (一)大豆花叶病感染本病后,叶面出现浓淡不同的各种花斑症状,进一步发展后,叶片变形,成为绉绸状,叶缘向下卷缩。受害程度因品种、感染时期和病毒系统不同而异,一般减产10-75％。因为种子表面产生与脐色相同而又略浓的带状或鞍架状斑纹(以下简称褐斑粒),所以品质很差。从叶片上难以分辨病症时,则以褐斑粒的有无,来做为诊断花叶病的标志。未成熟种子虽不出现褐斑,如在5％的亚硝酸苏打溶液里加入1/2的稀盐酸,配制成亚硝酸苏打
First, the soybean virus disease in Japan across the virus pathogen of soybeans, has identified 9 species, of which the three most damaging, namely mosaic disease, atrophy and dwarf disease. (A) Soybean mosaic disease Infection of the disease, the leaves appear various shades of different shades of symptoms, further development, the leaf deformation, a crepe-shaped, fringed down curl. Damage due to breed, infection period and the virus system varies, the general cut 10-75%. The quality is poor because the surface of the seed produces bands or saddle-shaped stripes of the same, slightly thicker umbilicus (hereinafter referred to as brown speckles). Difficult to distinguish from the leaves when the disease, the brown spot, with or without, as a diagnosis of mosaic disease mark. Although immature seeds do not appear brown spots, such as 5% of the nitrite soda solution by adding 1/2 of dilute hydrochloric acid, formulated as nitrite soda