In the deep winter, the fruit trees enter the dormant state completely, and the fruit tree diseases and insect pests also enter the deep winter place in different insect states with the change of the phenological period. The main points of plant protection at this time are: destroy the wintering place and reduce the survival rate of the winter.
Clear the garden. The dead branches, fallen leaves, weeds, diseases, insects, and dead fruits in the orchard are buried deep or burned.
Continue to do a good job of deep turning fertilization. At the same time, the method of covering the roots and stems of the tree with more soil is used for cold protection.
Young trees are protected from the cold. 1. For 1-3 year old saplings and seedlings, the branches and trunks should be painted white, which can effectively reduce freezing damage and prevent animal damage. At the same time, it can eliminate part of the pests that are going to overwinter.
The common formula of whitening agent is: 10 parts of water, 3 parts of lime powder, 0.5 parts of lime sulfur mixture stock solution (or 20-30 times of crystal lime sulfur mixture), 0.3 parts of edible salt. Pulverize the lime with water first, then add the stock solution of lime-sulfur mixture and edible salt and stir evenly (such as using crystal-sulfur mixture, first use a certain amount of water to dissolve the crystalline lime-sulfur mixture, and then add the scaled lime Mix the powder and edible salt evenly). In order to extend the period of the whitening agent, you can also add an appropriate amount of adhesive.
2. Newly planted saplings: those that can bend the branches and bury the soil, and those that can not bend the branches, can make a half-moon mound on the ground in the northwest, and wrap the upper branches with waste newspapers to shield the northwest cold wind in winter and reduce or avoid.
Pour frozen water at the right time to improve cold resistance. 1. Watering time: before the soil is frozen (within the 5 cm soil layer on the surface, the average ground temperature drops to 5
It can be frozen at night and thawed during the day).
2. Watering volume: Watering on the same day can quickly seep down to reach the root distribution layer, which is 60-80cm. The soil moisture should be maintained at 60-80% of the field water holding capacity.
Protect the wound. For large wounds of 1 cm or more caused by pruning or mechanical damage, immediately apply a healing agent or Molikang to protect it. One is to protect the water from scratching and cracking, and the other is to reduce the chance of pests and diseases.
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