1、 Cause of blackening

1. Disease: after this kind of plant has anthrax, the leaves will grow many round small black spots, and will slowly turn black and fall. The branches of the plant will also become relatively dry, which has a great impact on the growth of the plant

2. Pests and diseases: after the plant provokes some pests, the color of the leaves will turn black, and the black places will slowly become larger, affecting the nutrient supply of the leaves, and the leaves of the plant will fall off slowly

3. Improper water supply: giving too much water to such plants will affect the respiration of the plants, resulting in the blackening and falling of the leaves of the plants. If the water quality given to the plant is not good, the leaves will turn black

2、 Solution

1. When the plant gets sick, the sick leaves need to be cut off, and then put together to burn it. Also put the plant in a place with good air flow and spray the plant with therapeutic drugs several times

2. After being infected with pests, it is the same as the operation method of anthrax. You need to cut off the leaves and spray some medicine on it

3. When there is too much water supply, put the plants in a ventilated place and give less water each time. The water given each time should be clean. If tap water is used, it needs to be kept for a few days