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大豆花叶病发病症状我国南北各大豆产区均有发生,以南方产区多发病较重,对产量和品质影响较大。其症状常因品种、气候、植株感病时期和病毒株系不同有所差异。其病原物为大豆花叶病毒。病害在新叶出现明脉,后消失,变成浅绿至深绿相间的花叶,沿叶脉两侧出现许多深绿色的泡状突起。发病早的新叶花叶明显,发病迟的花叶较轻。感病后叶片皱缩、变小,质地变薄,感病品种的花叶症状明显,而抗病品种不显症状,或仅新叶呈轻微花叶症状,温度升高,则病株新出叶片不显症状。大豆感染该病后,病株结粒少,甚至不结粒。感病重的植株豆粒常有放射状或不规则褐色斑纹,俗称褐斑粒。大豆花叶病除危害大豆外,还可侵
Symptoms of soybean mosaic disease Soybean production areas in our country have occurred in North and South, with more serious incidence of the South producing areas, a greater impact on the yield and quality. Symptoms often due to breed, climate, plant susceptible period and the virus strains vary. The pathogen for soybean mosaic virus. The disease appeared in the new leaves Mingmai, disappear, into a light green to dark green mosaic, along the veins along the many dark green bubble-shaped processes. Early onset of new leaf mosaic obvious onset of late mosaic lighter. After the disease leaves shrinkage, smaller, texture thinning, susceptible varieties of mosaic symptoms, and disease-resistant varieties were not significant symptoms, or only a slight leaf mosaic symptoms, the temperature rises, the diseased new No significant symptoms of leaves. Soybean infected with the disease, the disease less grain, not even grain. Severe plant bean often radial or irregular brown markings, commonly known as brown spots. In addition to soybean mosaic disease soybean, but also invasive