Symptoms: when the disease occurs, there will be spots on the leaves, the central part will be dark gray, the edge is dark brown, and there will be many black mold layers on the surface. When it is serious in the later stage, the spots will spread to the whole leaves, and the leaves will show signs of wilting.
Prevention and control: take preventive measures in advance, plant properly, and avoid excessive watering in daily life, or the water will cause root damage. If it is found that the diseased leaves need to be removed in time, spray once every 7-10 days at the beginning of the disease, and spray 2-3 times continuously.
Symptoms: it is creeping, but it also has the effect of lodging disease. After the disease, the whole plant will droop, lie on the ground, the leaves will gradually turn yellow, and then there will be signs of decay.
Prevention and control: once the disease occurs, it is necessary to pull out the diseased plant in time, and then use root disease treatment, yishuangling, pulik, etc. to irrigate the soil, or spray chlorothalonil for prevention and control.
Symptoms: it mainly invades the leaves, young stems, flower organs and other parts. At the early stage of the disease, water spots will appear in the diseased part, and then gradually expand. At the later stage, a layer of gray to gray brown mold layer will form on the surface.
Prevention and control: strengthen the cultivation management, enhance the disease resistance of the plant, and control the watering after the disease.
