The yellowing of grape leaves is a common occurrence in grape growing. If it occurs in a small amount, it is the normal metabolism of vines. However, if this situation occurs in a large scale, it should be paid attention to, so as not to affect the growth of plants and the harvest of fruits. What are the reasons for the yellowing of the leaves, and how to solve this problem? Here is the introduction for everyone. Newborn High Chairs,Baby High Chair With Wheels,Baby High Chair 3 In 1,Children Dining Table Zhejiang Lamon Technology Inc. , https://www.baby-chair.com
Causes of yellowing of grape leaves 1. Caused by drought. Leaf coke caused by drought mainly occurs on the leaves of the base of new seedlings or cuttings in the same year. At first, the edge of the blade turns yellow and dry, and then gradually enlarges. In severe cases, the whole leaf will dry out. Perennial trees, rarely dry leaves.
2, the cause of sunburn. The time when the grapes grow new leaves is mostly between May and June. At this time, the light is weak, and the weather is cloudy and rainy. The leaves are thin and tender. After the rain, the sunny days are more, the sun is fierce, and the sun is hot. The edges are easily burned by the scorching sun.
3, caused by salt damage. The high salinity content in the soil will cause the leaves to turn yellow and dry, especially in the spring drought, soil return to alkali, and the seedlings are more serious when they are just germinated.
4, caused by fat damage. In the winter, too much phosphorus fertilizer is applied to the unfermented and rotted, and the nitrogen fertilizer is too small, the leaves are not grown with sufficient nitrogen fertilizer, and the leaves are also scorched.
5, caused by phytotoxicity. Improper medication or high concentration causes necrosis of the leaves and large areas of the leaves.
6, caused by potassium deficiency. There is a scorching phenomenon at the edge of the potassium-deficient leaves of the grapes.
7, anthrax. It is a disease caused by fungi. For example, the potting soil is often too wet, too much watering, poor drainage, sultry environment, high temperature, and easy to get the disease. The prevention and treatment methods for these diseases are: placing the pots in a ventilated place to prevent the potting soil from being too dry, especially to prevent excessive humidity, proper application of phosphorus and nitrogen fertilizers, and careful cleaning of the pots, so that the condition will be greatly reduced.
The leaf coke caused by different reasons, the performance of careful observation is not the same, should carefully distinguish the reasons, take appropriate measures to prevent.
Prevention methods for yellowing of grape leaves 1. Dry leaves caused by drought: The soil in the garden should be kept moist and loose. It should be timely watered when the leaves are slightly dry, but the number of times should not be too much, but it must be poured when watering, and the soil should be loosened after pouring.
2, salt and alkali caused by leaf dry coke: should improve soil improvement, apply more organic fertilizer, increase the ability of soil buffer saline; irrigation water, do not use salt-containing water; cover with plastic film to prevent soil back to alkali.
3, leaf dry coke caused by fertilizer damage: should avoid improper fertilization, the application of organic fertilizer should be fully decomposed, do not use unfermented raw fertilizer; when planting, prevent direct contact between fertilizer and root; planted seedlings do not rush to apply fertilizer, When applying, it should be applied less frequently; spray the foliar fertilizer, the concentration should not be too high.
4, the leaves caused by phytotoxicity: the use of pesticides, pay attention to the use of concentrations and reasonable mixing of pesticides; pay attention to the climatic conditions of the drug, do not use in the midsummer midsummer or when the dew is not dry.
[å°ç¼–结è¯] The above is the reason and solution for the yellowing of grape leaves. If large areas of yellow leaves are treated in time to avoid deepening and expanding the hazard, the most important way to prevent yellowing of leaves is to do scientific watering and fertilization. .