The yellowing of leaves often occurs in potted plants. The yellowing of potted leaves is mainly due to poor management of water yellow, dry yellow, yellowish yellow, yellowish yellow, alkaline yellow, or diseases and insect pests. The main types and methods of prevention and control are as follows: 1 In the cultivation process of yellow water, if the tip of new shoots of potted plants is found to be atrophic, the young leaves are yellowish, and the old leaves are gradually yellowing, indicating that the long-term wet water and the soil are lack of oxygen. The root has rotted. This may be the usual watering, and basin soil drainage is not smooth enough, or even cloudy and rainy, potted long exposure and other reasons. The potted soil shall be taken out from the pot, placed on a shaded, ventilated and sheltered place, so that it can be quickly breathable and emit water. At the same time, a small amount of water can be sprayed on the leaves. After 3 to 5 days, the flowers will be restored and the pots will be restored. 2 Dry yellow due to drought or leakage of water, etc., a moment when the basin is too dry, the leaf color of the potted heart and new leaves is normal, but the lower leaves gradually dry up and fall off yellow or dry coke, cactus and succulent plants are dull, evergreen flowers The leaf bristles or the surface of the leaves are not astringent. This situation is generally caused by insufficient water supply. It is advisable to place the potted flowers in the semi-shade place, pour some water on it, and spray a little water on the leaves until the stems and leaves are straightened and then watered. 3 If the plump yellow leaves are found to be hypertrophic and shiny, but not stretched, the old leaves turn yellow and fall off, indicating excessive fertilization, should immediately stop fertilizer, adequate watering. It is also possible to sow some radish and cabbage seeds in the pot and unplug it after a few days of emergence to consume nutrients in the pot. 4 If hungry yellow is found, the potted twigs are long and the leaves are thin and yellow, which indicates that the fertilizer is lacking. The pots should be poured in time, and gradually fertilize, water and strengthen the light. 5 Alkaline yellow Some of the flowers in the acidic soil, such as camellia, white orchid, gardenia and other flowers, in the alkaline soil, the leaves will gradually turn yellow and fall off, it should often be poured some black wolfberry fertilizer or some containing 0.10% sulfur Culture of soil cultured in powder, pot soil should be loose, drainage should be smooth. Other yellowing causes of potted flowers, such as those caused by powdery mildew and red dragon caterpillars, are generally yellow and rough. Most of the injury or pollution caused by the injury or partial browning. Hi-cool environment of the Admiralty, Clivia flowers, due to high humidity, high temperature, improper ventilation and shade, can also cause yellow leaves, shedding. The yellow leaf caused by the mosaic virus must be removed and burned in time, and the drug should be used for timely prevention and treatment. Some flowers appear yellow leaf is a normal phenomenon, such as white orchids, hibiscus, etc., germination of new branches, new later, old leaves yellow. After transplanting the flowers and trees, malnutrition or thick outer layers of the crown, and insufficient illumination of the inner canopy, a small amount of yellow leaves will also appear. After autumn, the deciduous flowers withered and withered in the frost was a normal phenomenon of plant growth.
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