The causes and prevention methods of apple defoliation, if the apple planting is improperly taken, it is easy to fall leaves. Here, the common causes of apple tree defoliation are analyzed, and some solutions are provided. To prevent and control deciduous diseases, it is necessary to combine agricultural control and chemical control. Use medicine to change the concept. Only by mastering the pathogenesis of diseases and grasping the prevention and treatment time can we achieve good control effects, increase production and quality, and increase the income of fruit farmers.
Pests and diseases cause apple tree leaves
The control of red spiders is not in place, causing the red spider to be seriously damaged on the back of the leaves, and the leaves cannot be photosynthesized to cause early leaves. In the prevention and treatment, it is necessary to start using the medicament to control the red spider after the flowering, and the avermectin 3500 is suitable. Take the medicine twice before the set. After the bag, potassium dihydrogen phosphate or humic acid foliar fertilizer should be added in the day to improve the function of the leaves, which can effectively prevent early defoliation.
Insufficient ventilation and light transmission lead to apple tree leaves
Due to the poor ventilation and light transmission conditions of the orchard, it causes early defoliation. In this case, if it encounters high temperature and high humidity, it will create favorable conditions for the reproduction of pathogens such as brown spot disease. In this way, a large number of fallen leaves are formed. In this case, some branches can be scientifically and rationally removed during the growing season. When the winter shears, the trees are stripped according to the tree shape to solve the problem of ventilation and light transmission, and the disease in the coming year is greatly reduced.
Malnutrition leads to apple tree leaves
The early defoliation caused by malnutrition, entering the flower bud differentiation stage in June, is a key fertilization period. This fertilizer is both a fruit development fertilizer and a flower bud differentiation fertilizer. Therefore, it is very important, which not only affects the output of the year, but also affects the quality of the flower buds in the second year. Therefore, this fertilizer, including the base fertilizer, must be fully nutriently applied. It is recommended to read: How to prevent and control apple leaf defoliation.
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