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病毒病:以苗期发病较多,在田间主要表现为花叶斑驳、皱缩花叶等。发病轻时,幼苗期出现花叶和斑驳症状的植株。发病重时,幼苗出现皱缩小叶丛生的花叶植株,叶片畸形、皱缩、叶肉隆起,形成疱斑,有明显的黄绿相间皱缩花叶。防治方法:(1)选用无病或耐病品种。(2)及时防治蚜虫。(3)在发病初期,选用20%病毒毙或20%病毒A500倍液喷雾防治,每隔7~10天喷一次,连喷2~3次。叶斑病:绿豆发病时,最初在叶片上出现水渍状小斑点,以后扩大为圆形或不规则的褐色斑枯斑,后期成为大
Virus disease: the incidence of more seedling stage, the main performance in the field mosaic mottled, wrinkled mosaic and so on. Mild onset, seedling emergence of mosaic and mottled plants. Occurrence of severe disease, the emergence of foliar foliage rustling mosaic plantlets, leaf deformity, shrinkage, leaf uplift, the formation of blister spots, there are obvious yellow-green and white folds. Prevention and treatment methods: (1) selection of disease-free or disease-resistant varieties. (2) timely control of aphids. (3) early onset, use 20% virus kill or 20% virus A500 times spray prevention and control, spray every 7 to 10 days, and even spray 2 or 3 times. Leaf spot disease: mung disease, the initial appearance of water-like small spots on the leaves, later expanded to a round or irregular brown spot, later became large