What if the leaves of longevity flowers turn black?

First, symptoms

1. The spread of this disease is relatively large, and its leaves, petioles, flowers and branches will be affected, but the most important place is the leaves.

2. In general, at the beginning of this disease, the leaves are reddish brown and purplish brown, and then slowly grow into black. This kind of black plaque will be surrounded by yellow circles, generally showing a state of radiation, the size is about three to real millimeters.

3. Generally speaking, in the later stage, there will be some black spots above the disease spot, and when it is more serious, its lower part will be withered and yellow, the leaves will fall, and some branches will die.

4. Generally speaking, this kind of disease begins to appear in May, and July and September are more popular, because Rain Water will be more abundant at this time, and they will be spread by Rain Water, wind and insects, so if the place is relatively low, ventilation and light, as well as fertilizer and water are not very good, the disease is very easy to occur under this condition.

II. Solutions

1. In fact, when we first buy plants, we have to choose strong plants that are not prone to disease, so that it is much less likely to get sick later on.

2. If we have planted it, we can only clean up the withered branches and leaves after autumn, and it is best to burn it. In addition, we have to carry out pruning and so on, and then put it in a place with stronger ventilation and light.

3. When a new leaf grows, we can use carbendazim or chlorothalonil to treat it. Spray once every seven to ten days, three or four times can solve this symptom. Before the symptoms appear, we should also be careful to control them so as not to increase the risk of the disease.