1. Symptoms: the disease is caused by the infection of seminiflora. In the early stage of the disease, the leaves of Zijin cattle will appear small brown spots, which are irregular or nearly round in shape. If not treated in time, the lesions will gradually expand, causing the leaves to wither and die.
2. Prevention and control method: once the disease is found, the diseased leaves shall be cut off in time and burned intensively. At the same time, Bordeaux solution or triethylphosphoric acid should be used immediately to spray the leaves for treatment.
1. Symptom: it is mainly harmful to its root and may also harm its ground part. In the early stage of the disease, there will be small nodules with rough surface on the rhizome, and then the nodules will gradually increase. The root system of the plant is damaged, resulting in slow growth of the diseased plant, and even death of the whole plant.
2. Prevention and treatment method: remove the tumor in time and disinfect the wound. At the time of onset, the infected plants need to be treated with agricultural streptomycin or copper sulfate solution.
1. Symptoms: the scale insects propagate in the environment with poor ventilation conditions, and do great harm to plants. Its adults and larva will draw juice from the leaves, which will produce yellow spots.
2. Prevention and control method: when maintaining the plant, it is necessary to ventilate frequently. Once the scale insects are found on the leaves, they need to be treated in time by spraying chlorphenazine on the diseased plants or killing the milk oil quickly. Spray once every 7 days, 2-3 times continuously.
