1、 Leaf blight

Symptoms: at the beginning, the disease is under the leaves, and irregular round spots appear on the diseased leaves. When the disease is serious, the leaves will die

Prevention and control: when diseases are found, the diseased leaves need to be removed in time, and special fungicides should be sprayed every 7-10 days

2、 Mosaic disease

Symptoms: when the disease occurs, uneven spots will appear on the leaves, resulting in the plant becoming short, the edge of the leaves will also shrink, and the shape of the whole leaves will become smaller. In addition to harming the leaves, it will also affect the petals, resulting in light brown spots on the petals, and it will not bloom easily

Prevention and control: when planting, we should choose disease-free ones, so as to eliminate infection from the source. At ordinary times, we should strengthen the prevention and control of pests, which will also affect the disease. When sick plants are found, they need to be removed in time, and then they need to be destroyed together

3、 Spot disease

Symptoms: at the beginning of the disease, small brown spots will grow on the leaves, and then there will be black spots in the center of the disease spots. In severe cases, the whole leaves will turn black and die

Prevention and treatment: remove the diseased leaves in time to prevent the spread of the disease, and then spray with mancozeb, which can have a good effect