牛蒡生长期间最易发生的病害如下: 1.牛蒡花叶病 属病毒病。主要由蚜虫传播,秋季始发,为害成长的牛蒡。防治方法是:①注意防治蚜虫,消灭传毒媒介。②发病初期喷洒5％菌毒清加细胞分裂素400倍液或病毒克500倍液或病毒杀400倍液,5—7天1次,连防2—3次。 2.牛蒡黑斑病 属真菌病害,借风雨传播。该病多在秋季发生,幼苗受害严重,主要为害叶片、叶柄。苗期染病在叶上生褐色至茶 Burdock growth during the most prone to the disease are as follows: 1. Burdock mosaic disease is a viral disease. Mainly spread by aphids, autumn onset, the damage to the growth of burdock. Prevention methods are: ① pay attention to the prevention and treatment of aphids, eliminate transmission media. ② early onset of spraying 5% cytotoxic Qing Qing cytokinin 400 times or 500 grams of virus or virus to kill 400 times the liquid, 5-7 days 1, and even prevent 2-3 times. Burdock black spot is a fungal disease, spread by wind and rain. The disease occurs mostly in autumn, seedlings suffer serious damage, the main damage leaves, petioles. Seedling disease in the leaves brown to the tea