Causes of the withered leaves of crape myrtle trees. Prevention and control measures for the withered leaves of crape myrtle trees. As the seasons change, many gardening enthusiasts find that the leaves of their crape myrtle trees have begun to turn yellow, which not only affects the beauty of the crape myrtle trees, but also makes people worry about it. Health, this article will delve into the reasons for the withered leaves of crape myrtle trees, and provide corresponding prevention and control measures to help you maintain your crape myrtle trees. Reasons why the leaves of crape myrtle trees turn yellow 1. Lack of water The crape myrtle trees require high water. If the soil dries for a long time and the roots cannot absorb enough water, the leaves will turn yellow due to lack of water, and improper watering, such as too much or too little water will also cause the leaves to turn yellow.
2. Insufficient fertilizer requires sufficient nutrients for the growth of crape myrtle trees. If the soil lacks necessary nitrogen, phosphorus, potassium and other elements, the leaves will turn yellow. Long-term non-fertilization or improper fertilization may cause the leaves of crape myrtle trees to turn yellow.
3. Invasion of pests and diseases on crape myrtle trees can easily be attacked by pests such as aphids, red spiders, and scale insects. These pests will absorb nutrients from the crape myrtle tree and cause the leaves to turn yellow. Crape myrtle trees may also be affected by diseases such as leaf spot and anthrax. Invasion can also cause the leaves to turn yellow.
4. Crape myrtle trees like light due to insufficient light. If they are exposed to a dark environment for a long time, their leaves will turn yellow due to insufficient light.
5. Soil problems Soil problems such as poor soil drainage, soil hardening, and inappropriate soil pH can all cause the leaves of crape myrtle trees to turn yellow. Prevention and control measures for withered leaves of crape myrtle trees 1. Reasonable watering According to the growth habits of crape myrtle trees, water in a timely and appropriate manner. When high temperatures and drought in summer, the number of watering should be increased; when low temperatures in winter, the number of watering should be reduced. When watering, try to water the roots thoroughly to avoid stagnant water.
2. Scientific fertilization According to the growth needs of crape myrtle trees, reasonably apply fertilizers such as nitrogen, phosphorus, and potassium. When new buds germinate in spring, nitrogen fertilizer can be applied to promote the growth of new buds; when the growth is strong in summer, compound fertilizers can be applied; before falling leaves in autumn, Phosphorus and potassium fertilizers can be applied to promote flower bud differentiation.
3. Regularly inspect crape myrtle trees to prevent and control pests and diseases, and take timely measures when pests and diseases are discovered. For pests, biopesticides or physical methods can be used to control; for diseases, targeted pesticides can be used to control them.
4. Improve the light conditions and move the crape myrtle tree to a place with sufficient light, or prune the branches and leaves that are too dense to improve the light conditions.
5. Improve soil For soil with poor drainage, improvements can be carried out, such as adding organic fertilizers, loosening soil, etc. For soil with inappropriate soil pH, lime or sulfur can be applied to adjust the soil pH.
There are many reasons for the withered leaves of crape myrtle trees, which need to be analyzed and controlled according to specific conditions. Through measures such as reasonable watering, scientific fertilization, pest control, improvement of light conditions and soil, the problem of withered leaves of crape myrtle trees can be effectively solved. Let your crape myrtle trees come back to life.