Fruit tree leaf yellowing
Excessive rainfall can easily cause the supply of main nutrients to be full or even excessive, and it will also cause the supply of some elements to exceed demand, which leads to the phenomenon of yellow leaves in fruit trees. Therefore, after the rain, we should do a good job of top dressing in time, combining underground top dressing and foliar fertilization to supplement the nutrient elements lacking in fruit trees. Pay attention to the symptoms of element deficiency before administration and supplement the corresponding elements. At the same time, it is necessary to chemically control the overgrowing fruit trees.
Properly fertilize and increase fertilizer to help restore tree vigor. Use 0.3% potassium dihydrogen phosphate solution to spray once every 10 days, and spray it for 2 to 3 times. Foliar spraying can be done simultaneously with spraying. Orchards that have been severely affected should adopt multi-point application method to topdress phosphorus and potassium fertilizer, fruit tree special fertilizer, diammonium phosphate, etc., about 40 kg per mu.
Cause rotten roots
The main reason for rotten roots is that after heavy rains, the orchard is low-lying or drainage is not in place. Due to the excessive accumulation of water, the root system is hypoxic, which will deplete the roots and affect the supply of nutrients, causing the leaves to quickly wither and the roots to rot. In this case, remove stagnant water. After violent storms and rains, individual orchards have low-lying terrain and accumulation of water after the rain, which will cause anaerobic respiration of the roots of the fruit trees, which will cause some roots to re-root, affect nutrient supply, and cause rapid wilting of leaves in a short period of time, and root rotten phenomenon. Ditch drainage can be used. After shallow turning, apply quicklime and spray Aiduo for sterilization.
Flower bud differentiation is blocked
The prosperous growth of fruit trees caused by heavy rains will affect the conversion from vegetative growth to reproductive growth of fruit trees, which makes the nutrient distribution of fruit trees less effective in the differentiation of flower buds, resulting in hindered and poor differentiation of flower buds, which will affect the yield in the coming year. Therefore, the summer pruning work is particularly important. It is necessary to remove too many branches on the back in time, or to adjust the tree vigor by pulling branches to balance and coordinate the supply of nutrients. It is also possible to spray potassium dihydrogen phosphate and growth inhibitors to promote the benign process of flower bud differentiation.
Pruning
Severe storms will cause the orchard to be messy and decay. The orchard should be cleared in time, pruning after the disaster should be strengthened, and the fruit and leaves in the orchard should be completely removed from the fruit orchard, and the orchard should be pulled outside the orchard to dig a hole and bury it. Cut off the branches and remnants, clean them out of the garden and burn them together, so as to reduce pathogen infection and promote ventilation and light transmission. If the fruit bag is damaged and the fruit is not damaged, remove the damaged bag, spray the fungicide again, and then re-bag the bag to straighten the soil after the liquid is dry
For fruit trees that slanted or fell on the ground after the disaster, the soil should be straightened up in time, and the soil should be stomped to avoid damage to the roots again.
Whether the orchard management is in place directly affects the growth of the tree, the output and quality of the fruit. Therefore, the management of the orchard after the rain cannot be ignored, and the management work must be in place.
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