Why do the old leaves fall off after the yellow peel hangs fruit?

Huangpi is currently in the period of fruit expansion, and his main job is to protect and promote fruit expansion. Due to the good weather at flowering period and ideal fruit setting with yellow skin, many orchards bear many fruits. At present, the fruit began to color and entered the expansion stage. The recent rainy days are very unfavorable to the growth of wampee, and orchards lacking organic fertilizer begin to crack and drop fruit.

① Fertilize to ensure fruit. Yellow bark is hydrophobic, the root system is soaked in water, and serious Huang Shi will easily lead to leaf shedding. Spraying proper amount of compound fertilizer or foliar fertilizer in the canopy on sunny days can increase the nutrients of trees.

(2) Spraying drugs to prevent anthrax after sunny days.

3 thin fruit. In order to ensure that the ear is neat and the fruit size is consistent, small fruits with late flowering should be thinned out, and some fruits with too many ear can be thinned out, which can reduce fruit cracking and fruit dropping in the later period.

(4) Fertilization before harvesting is beneficial to the recovery of trees and the emergence of autumn shoots. The root system of wampee is weak, which is often affected by high temperature and dry weather. There are fewer autumn shoots in orchards lacking fertilizer and water management, which affects nutrient accumulation and flowering and fruiting in the coming year. Therefore, the quantity and quality of autumn shoots have a great influence on the annual output.

⑤ Bagging. Because there are many pests and diseases after the weather changes, in order to reduce spraying and improve fruit quality, bagging can be carried out during the fruit expansion period. Before bagging, the fruit should be thinned, then sprayed with chemicals to control pests and diseases, and finally bagged.

In addition, topdressing outside roots combined with hormone spraying can protect fruits. Before the end of the second physiological fruit drop, that is, when the diameter of young fruit is about 0.4 cm, 50ppm of mixed solution of "Jiuer O"+0.2% potassium dihydrogen phosphate +0.3% urea is sprayed outside the root, and it is sprayed again every 7- 10 days for 2-3 times. In this way, auxin and nutrient elements are supplemented to young fruits, which stimulates and promotes ovary development and effectively reduces physiological fruit drop. This practice is also good!