Pear Tree Early Spring Frost Damage Protection Methods and Technical Key Points
I. Frost Prevention 1. Spray salt water: Before the late frost arrives, spray the tree with 10-20% salt water. This can increase the concentration of cell sap in the tree, lower the freezing point, and also increase air humidity. When water condenses in the cold, it releases latent heat, thereby protecting against frost damage. 2. Spray hormones: In early spring, spray 0.1-0.2% maleic hydrazide solution to inhibit budding and delay flowering,...
I. Frost Prevention
1. Spray salt water: Before the late frost arrives, spray the tree with 10-20% salt water. This can increase the concentration of cell sap in the tree, lower the freezing point, and also increase air humidity. When water condenses in the cold, it releases latent heat, thereby protecting against frost damage.
2. Spray hormones: In early spring, spray 0.1-0.2% maleic hydrazide solution to inhibit budding and delay flowering, avoiding frost damage.
3. Whitewashing and white spraying: In early spring, use 7-10% lime solution to whitewash the trunk and main branches, and spray the canopy white. This can delay sprouting and flowering.
II. Care After Frost Damage
Frost-damaged pear trees should have fertilizer and water management strengthened. Apply decomposed human manure or quick-acting nitrogen fertilizer as a top dressing, and spray 0.2% urea and monopotassium phosphate on the leaves to promote rapid recovery of tree vigor. If frost occurs during the flowering period, spray 50 PPM gibberellin to increase the fruit-setting rate. At the same time, pay attention to pest and disease control, protect the leaves, and carry out timely artificial pollination for late-blooming flowers that have not been frost-damaged.