Spring flowers and trees should be full of vitality and vitality, but some plants and stumps will begin to wither and even die after they have issued a few leaves. The main reasons are as follows:
Too much watering: Excessive watering will cause long-term saturation of the water in the basin soil. The roots of the plants will rot or mold and even cause death due to lack of oxygen supply. Excessive fertilization: Excessive fertilization or high fertilization concentrations can easily lead to plant rooting and death. In particular, the newly-replaced plants have weak root absorption capacity and are mainly consumed by nutrients and moisture in their own body. Shelter is too early: In spring, the temperature difference between hot and cold is too early to move flowers and plants out of greenhouses. Flowers and trees are prone to death because they cannot adapt to the rapidly changing weather conditions. On the other hand, if the new flowers in the upper pot just grow new leaves, the sunlight will accelerate the water evaporation of the leaves and cause the water loss of the plants. Insufficient supply of water: If the basin soil is in a state of drought for a long time, the trees will not absorb enough water, and in the spring, the temperature will rise rapidly, the wind will be large, and the water will evaporate quickly, which will easily lead to the unbalanced supply and demand of flowers and trees and eventually lead to their death. Inappropriate pH: The biological characteristics of plants differ from that of acidic soils. If plants in acidic soils (eg Camellia, Rhododendron) are planted in alkaline soils, the plant will naturally die and vice versa. Diseases and Insect Pests: The main insect pests that cause the flowers and branches to wither and even die are the scale insects, aphids, scarabs, and long-horned cows. Some of them absorb the liquids in the plant tissues, and some of them harm the roots of the flowers and some of the xylem break into the flowers. Diseases that cause death of flowers and trees include powdery mildew and blight.
The following measures can be taken to prevent flowers and trees from dying in the spring:
The amount of watering: For the general flowers and trees, the principle of watering is not irrigated or poured. Reasonable fertilization: The principle of potted fertilization is to apply less fertilizer and less fertilizer, but the frequency of fertilization should be more. In order to meet the demand of nutrients for flowers and trees, if necessary, 0.5% urea liquid fertilizer or 0.25% potassium dihydrogen phosphate fertilizer can be used for foliar fertilizer application. Excessive fertilization or excessive fertilization can cause fertilizer damage. Timely out of the shed: All flowers and trees should not be moved out of the shed prematurely and should be moved out after the weather is stable. In particular, the new pots and trees should not be moved out of the shed to be exposed to sunlight in a premature manner, but should be kept in the shed or in a cool and ventilated place for a period of time (generally until mid-April). To the sun. Basin soil is properly formulated: In the process of basin soil preparation, it is necessary to consider not only its fertility but also its pH 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: prevention of scale insects and aphids sprayed with 40% omethoate 1000 times or other insecticides; prevention and control of chafers using black light traps to kill adults, artificial killing of adults or insecticides; control of blight in the incidence In the initial stage, 70% thiophanate-methyl wettable powder 1000 times was used to irrigate the roots.
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