Causes and control of citrus yellowing

Citrus yellowing will cause leaves to lose green and yellow, photosynthetic ability is greatly reduced, resulting in weakened crop disease resistance, poor ability to absorb water and fertilizer, the result is low yield, poor fruit quality, so that the income of fruit farmers is directly lost. So, what are the reasons for the yellowing of citrus cultivation? And how to prevent it?

Causes of occurrence:

1. Abuse of pesticides

The abuse of pesticides or herbicides with unstable traits causes damage to the young tissues of plants and weakened roots. There is also a pesticide after the application of a pesticide, a short period of time and then the application of another effect of the pesticide, long-term use of these methods of application will lead to soil poisoning, acid-base imbalance, resulting in citrus yellowing disease.

2. Pests and diseases

Yellowing of citrus caused by the inducement of dragon disease and other pathogens, such as yellowing anthrax, crack skin disease, skirt rot, resin disease and other fungal or bacterial diseases.

3. Improper use of fertilizer

Only compound chemical fertilizer or partial application of nitrogen fertilizer, ignoring the input of organic fertilizer, resulting in a continuous decline in soil organic matter, chemical fertilizer utilization rate declines, this lack of organic matter of the soil is easy to make the tree body disease resistance is poor, the root system is weak, and the pathogen is easy to invade the tree.

Prevention and control measures:

1. Tree management

Promptly remove wilted branches caused by resin disease infection and apply protective agent to the wound.

2. Fruit thinning

The yield control of adult trees should be done in time to thin flowers and fruits to avoid too many fruits.