Cover the shed in time. For the dragon fruit grown in the greenhouse, it is necessary to do a good job of covering it in winter. It is mainly based on the temperature. When the average temperature of day and night is lower than 20 degrees, the shelter must be covered in time. To prevent the temperature from being too low to cause harm to the growth of dragon fruit, especially for some fresh shoots, which can cause death in severe cases. Covering the shed can effectively increase the surrounding temperature, which is conducive to the development of the tender shoots and the harvest of the last few batches of fruits, but also pay attention to the humidity in the shed, and open the shed for ventilation on sunny days.
Apply overwintering fertilizer. After harvesting the fruits, spray overwintering fertilizer in time to improve the fertility of the soil, supplement nutrients for the dragon fruit tree, and restore the growth of the fruit tree. Ensure that the dragon fruit tree has sufficient nutrient accumulation to promote the budding of the fruit tree in the second year. It can also improve the resistance of fruit trees, enhance cold resistance, and promote successful overwintering. When applying overwintering fertilizer, pay attention to controlling the application amount according to the planting area to ensure adequate nutrition and prevent fertilizer damage to the fruit trees.
Clear the garden in time. After harvesting and fertilizing, the branches of the fruit trees that have grown weak and pests should be cut off, and then the branches and fallen flowers and fruits should be taken out of the orchard for burning and deep burying. Then spray disinfectant pesticides throughout the garden to destroy the overwintering places of pests and bacteria, reduce the number of pathogens and eggs, and reduce the incidence of pests.
Finally, apply pine film and other substances to the fruit trees to improve the disease resistance and cold resistance of the fruit trees. Prevent pests from harming the lower stems of the plants.
Postpone pruning. Pruning is not suitable in winter. We should try to do pruning in early spring. Because of the low temperature in winter, pruning may cause the sprouted buds to suffer low temperature damage. And postponing the pruning time can also increase the nutrient accumulation of the tree body, which is beneficial to avoid the occurrence of pests and diseases due to wound infection due to pruning. Therefore, in winter, we must prevent mechanical wounds on the tree, which will affect the growth of the dragon fruit tree.
Pest Control. The above four points have the prevention and control effect of pests and diseases. Although the temperature is low in winter, if the management is not good, there will still be *** pests and diseases. Therefore, in winter, we must do a good job of preventing and controlling pests and diseases to prevent them from affecting the overwintering of dragon fruit, which will reduce the economic benefits of planting. In addition to strengthening management, the orchard should be sprayed and disinfected regularly, and corresponding measures should be taken in time after the disease occurs to prevent the disease from spreading and expand the affected area.
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