What causes orange tree leaves to turn yellow and how to treat it?

There are many people who grow citrus fruits . If the leaves turn yellow, it will affect the photosynthesis of the leaves, reduce the synthesis of organic matter, and greatly reduce the yield and quality. So what is the reason why orange tree leaves turn yellow and how to treat it? Let’s learn more about it below.

1. Environmental changes

Citrus is sensitive to environmental changes. Sudden changes in temperature, insufficient light or excessive exposure to the sun, high or low humidity, etc. can all cause citrus leaves to turn yellow.

Treatment method : Maintain stable temperature and humidity, avoid extreme temperature changes and excessive exposure. Provide proper lighting and place the citrus in a location that is bright but not directly exposed to strong sunlight.

2. Lack of nutrients

If citrus lacks nutrients during its growth and development, the plants will be seriously affected and the leaves will turn yellow.

Treatment method: Apply fertilizer in time and use diluted nitrogen, phosphorus and potassium compound fertilizer . During the growth period, fertilizer should be applied every 10-15 days. The temperature is high in summer, so fertilize once every 15-20 days. When the temperature is low in winter, citrus will enter a dormant period and fertilization will stop.

3. Strong light

If citrus trees are exposed to direct sunlight in summer, the plants and leaves will be burned. The leaves will develop sun spots and turn yellow, and the plant will dry out.

Treatment method: When the sun is strong in summer, it is necessary to place it in a shaded position to scatter sunlight, avoid direct sunlight, and trim its withered branches and leaves in time.

4. Overwatering or underwatering

Citrus requires an adequate amount of water to maintain normal growth. Overwatering can cause a lack of oxygen to the roots, while underwatering can cause a lack of water, both of which can cause leaves to turn yellow and fall off.

Treatment method: According to the growth conditions and season, water reasonably and keep the soil moist, but not too wet, to avoid waterlogging and root hypoxia. Check the soil moisture before watering, and water only when the soil surface is slightly dry.

5. Huanglongbing

Once citrus is infected with Huanglongbing, one or several branches will turn yellow in the crown of the tree, forming yellow tips. The yellow tips are particularly obvious in autumn and winter. The leaves on the diseased trees appear as uneven patches of yellow and green.

Control methods: You can choose 52.25% high chlorpyrifos EC1000 times, 10% imidacloprid EC1500 times, 70% imidacloprid 7000 times, 25% thiamethoxam WG3500 times, 22% flubendiamide SC4000 times, 24.5% abamectin mineral oil 1500 times, etc.

That’s it