What if the leaves of Anthurium andraeanum grow black spots?

1. Leaf spot disease

(1) Specific cause: There is a disease called "leaf spot disease". When the disease occurs, black spots may appear on the leaves of the plant. At the beginning, there will be some small spots on the back of the leaves, which are lighter in color. Further development, it will become a large spot, and the color is also dark, accompanied by yellow rings. This disease is mainly caused by high temperature and humidity in the environment and poor ventilation.

(2) Solution: First of all, the leaves that have grown black spots must be removed and concentrated, preferably burned. Doing so can effectively prevent the spread of disease. Next, we can spray chemicals to prevent and control, Bordeaux mixture or carbendazim are OK. Frequency control in every interval of a week spray once, a total of four or five spray can be. Also, usually pay more attention to ventilation, improve environmental conditions.

2. Anthrax

(1) Specific causes: This disease can also cause some small black spots on the leaves. As the disease worsens, the area of the spot will increase.

(2) Solution: First, we also have to deal with the diseased leaves. Second, spray Bordeaux mixture. Also, the management of fertilizer water is very important. Especially drainage and humidity.

3. Lighting problems

(1) Specific reasons: This plant itself is afraid of strong light. If it is exposed to bright light for a long time, it may also grow spots. If the symptoms are mild, the color will be lighter, and if it is severe, black spots will appear.

(2) Solution: If this is the case, then appropriate shade is needed. At ordinary times, scattered light can be used to avoid direct light exposure.