Solution:
1, spraying pesticides at ordinary times: for the maintenance of orange trees, do not rescue them after diseases appear, and disinfect and kill insects regularly at ordinary times. You can spray some pesticides, which can kill some insects or eggs attached to the surface of the trunk and prevent insects from multiplying rapidly.
2. Apply pesticide around the trunk: take targeted measures and apply pesticide directly on the trunk of the insect in proportion. Some common insects can't stand the smell of pesticides or some insecticidal drugs or eat them, and they will run away or die directly, which has insecticidal effect.
The roots of trees are coated with lime: it can prevent trees from being eaten by insects. In addition, it is suggested to sprinkle lime on the soil around citrus reticulata, which can improve the high acidity of the soil and prevent pests from hatching eggs on the way, thus killing insects in the eggs.
Extended data:
Growing habits:
The growth, development, flowering and fruiting of citrus fruit trees are closely related to environmental conditions such as temperature, sunshine, moisture (humidity), soil, wind, altitude, topography and slope direction, among which temperature is the most important factor. Even if the temperature difference is 0.5℃, sometimes there will be completely different results. The growth and development of citrus fruits need a temperature of 65438 02.5 ~ 37℃.
Slightly resistant to shade, like warm and humid climate, not cold-resistant, freezing injury occurs when the temperature is lower than -8℃, and it is suitable for growing in deep and fertile neutral to slightly acidic sandy loam.
High temperature is also not conducive to the growth and development of citrus. When the air temperature and soil temperature are higher than 37℃, fruits and roots stop growing. Temperature also has obvious influence on fruit quality: in a certain temperature range, with the increase of temperature, the sugar content and soluble solids increase, the acid content decreases and the quality becomes better.