Spring flowers and trees should be full of vigor and vitality, but some plants and stumps will begin to wither and even die after sending a few leaves. The reason is mainly the following aspects.
Too much watering with watering will lead to long-term saturation of the water in the basin soil, and the roots of the plants will rot or mold and even die due to lack of oxygen supply.
Excessive fertilization with excessive fertilization or excessive fertilization may easily cause root burning, resulting in death of plants withered. In particular, the newly-replaced plants have weak root absorption capacity, and consume mainly nutrients and water in their own bodies. At this time, fertilization is most likely to burn out the roots.
Shed early in the spring, hot and cold, large temperature difference, prematurely move flowers out of the shed, flowers and trees because of the inability to adapt to the rapid changes in the weather outside the situation and cause death. In addition, the soon-to-be-flowered plants in the upper basin just took out new leaves and got them under the sunlight, which will accelerate the evaporation of the leaves, causing the plants to lose water and cause death.
Insufficient supply of water If the basin is in a state of drought for a long time, flowers and trees will not absorb enough water. In spring, the temperature rises quickly, the wind is large, and the water evaporates quickly. It is easy to cause unbalanced supply and demand of flowers and trees, and eventually cause death.
The biological properties of improper pH plants vary, some prefer acidic soils and some have alkaline soils. If plants in acidic soils (such as camellia or rhododendron) are planted in alkaline soils, plants cannot survive and naturally die, and vice versa.
The major pests caused by diseases and insect pests, such as scale insects, aphids, scarabs, and long-horned beetles, which cause the branches and leaves of flowers and trees to wilted and even die. Some of them absorb liquids from plant tissue, and some harm the roots of flowers and trees, and some of them break into the xylem of flowers and trees. Diseases that cause death of flowers and trees include powdery mildew, white peony disease, and blight.
After understanding the cause of death of flowers and trees, we must take active measures to prevent it. The following measures can be taken.
The right amount of water for the general flowers and trees, the principle of watering is: do not do not poured, pouring is drenched. During the flowering process, the initial symptoms of excessive watering are that the young leaves turn light yellow, and the old leaves do not change much or darken. When this symptom occurs, it is necessary to appropriately reduce the amount of watering and the number of watering, and loosen the soil once. Severe symptoms should be changed again. For plants that have been in a state of drought for a long time, it is necessary to increase the amount of watering. Sometimes the entire potted plant can be placed in a bucket filled with water and allowed to soak for a period of time to make the potted soil soaked. At the same time, water is sprayed on the flowers and leaves to ensure a balance between supply and demand for water. The symptoms of mild drought are as follows: first, the old leaves yellow and gradually develop into new leaves.
Rational fertilization of potted plants fertilization principles: thin-fertilizer ground, that is, the amount of each fertilization should be less, but the number of fertilization should be more. In order to meet the demand of flowers and trees for nutrients, 0.5% urea liquid fertilizer or 0.25% potassium dihydrogen phosphate liquid fertilizer can be formulated for foliar application. Excessive fertilization or excessively high fertilization can cause fertilizer damage. Symptoms of mild injury are that the old leaves gradually wither off and the new leaves are thick and shiny.
Timely shed all flowers and trees should not be moved out of the shed too early, should wait for the weather to stabilize before moving out. In particular, the new pots and trees should not be moved out of the shed and exposed to sunlight in advance, but should be kept in the shed or a cool, ventilated place for a period of time (usually until mid-April). Gradually move to sunlight.
Basin soil preparation In the basin soil preparation process, we must not only consider its fertility status, but also consider its pH value to see if it meets the biological characteristics of the species. If the pH does not meet the requirements, new soil should be prepared as soon as required.
Effective control of pests and diseases Scale insects and aphids are sprayed with 40% omethoate 1000-2000 times liquid or other insecticide. Prevention and control of chafers using black light traps to kill adults, artificial killing adults or insecticides.
Prevention of blight: The diseased plants were concentrated and burned. In the early stage of disease, 70% thiophanate-methyl WP was used to irrigate the roots.
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