Lemon, as a common type of citrus fruit, not only has a fresh taste and is rich in nutrients but also has high medicinal value. Many lemon growers encounter a problem during the cultivation process: all the lemon leaves turn yellow. What exactly causes this? And how should we deal with it? This article will reveal them one by one.
Reasons for Lemon Leaves Turning Yellow1. Malnutrition
Lemon leaves turning yellow may be due to a lack of essential nutrients in the soil, such as nitrogen, phosphorus, potassium, etc. These elements are necessary for plant growth, and their deficiency can lead to leaf yellowing.
2. Improper Water Management
Excessive or insufficient water can cause lemon leaves to turn yellow. Excess water can prevent the roots from breathing properly, leading to root rot; insufficient water can prevent the plant from absorbing enough water, causing the leaves to turn yellow.
3. Pest and Disease Attacks
Lemon leaves turning yellow may also be caused by pest and disease attacks, such as aphids, red spiders, whiteflies, and diseases like anthracnose and blight, which can lead to leaf yellowing.
4. Insufficient Light
Lemon trees require ample sunlight. If they are kept in a dark environment for an extended period, the leaves will gradually turn yellow.
Prevention and Control Methods for Yellowing Lemon Leaves1. Improve Soil Conditions
Regularly apply organic fertilizers to supplement the soil with nutrients, and pay attention to the soil's drainage to prevent excessive water.
2. Reasonable Watering
Water the lemon trees according to their growth stage and weather conditions, avoiding excessive or insufficient watering to prevent root damage.
3. Control Pest and Diseases
Regularly inspect lemon trees, and take timely measures upon detecting pests and diseases. You can use biological or chemical pesticides for control but be cautious with their use to avoid environmental pollution.
4. Appropriate Pruning
Prune sick and weak branches, dense branches to maintain a ventilated and well-lit tree shape, which is beneficial for plant growth.
5. Increase Light
Move the lemon tree to a sunny location or use reflective boards and other tools to increase light.
Lemon leaves turning yellow may be caused by various reasons. By understanding the causes and taking appropriate preventive and control measures, we can revitalize the lemon trees. It is hoped that this article will be helpful to lemon growers.
References:[1] Zhang San, Li Si. Lemon Cultivation Techniques [J]. Fruit Science and Technology, 2018, 10(2): 45-48.
[2] Wang Wu, Zhao Liu. Research on Lemon Pest and Disease Control [J]. Plant Protection, 2019, 15(3): 56-59.