The leaves of the Ping an tree have black spots and black edges, which is a sign that the rich tree is sick.
One of the most common diseases in family planting of Ping an trees is leaf spot disease, which is caused by the use of airtight pots, soil consolidation and excessive watering. It is the main cause of this disease. Planting safe trees in airtight pots is most likely to occur in these diseases. It is suggested to change the breathable pots such as pottery pots for Ping an trees, and to change the soil in the pots. It is too impermeable and easy to get sick.
Check the root system while changing the basin. The cause of this disease is that the winter temperature is not above 20 degrees, too much watering, and the basin soil has been too wet and not ventilated. If the state of the picture is not too serious, do not water it first. After the basin soil is thoroughly dry, water it thoroughly with 11000 carbendazim water and cut off the dried leaves. Spray leaves 2-3 times with carbendazim at an interval of about 1 week, and try to choose a time with good light at noon when spraying. It should be relieved effectively after 3 times or so.
The picture above is raised by a flower friend last time, which is more serious than that in the first picture. watering in winter must be controlled, the temperature can not reach, the basin soil can be dry and then watered thoroughly, and the warm noon should be chosen as far as possible, and the window should be properly opened for ventilation at noon. Wait until spring returns to normal watering. Usually when the window is ventilated, the leaves spray some water to increase the air humidity. Spraying carbendazim once a month in winter can effectively prevent leaf blight and leaf spot disease.
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