High concentrations of ethephon, organophosphorus pesticides, such as water amphophorain, methamidophos, trichlorfon, dichlorvos, and monocrotophos often cause apple, peach, and some vegetables to fall or fall before and after flowering. Spraying chemicals during flowering often causes poor pollination and fruit drop. Therefore, it is recommended that ordinary vegetables and fruit trees do not spray fertilizer on flowers during flowering.
Before flowering, 15-20 days before budding, 200-250 grams of urea are applied to each plant. After Xie Hua, topdressing should add phosphorus and potassium to reduce early fruit loss. Each fruit tree was applied with 150 g of urea, 200-250 g of superphosphate, 250 g of potassium chloride or 10-15 kg of plant ash. With fruit enlargement and embryo development, it is necessary to enhance the absorption of nutrients. In the nuclear hardening period, it is better to use a combination of decomposed animal dung and urine for quick-acting phosphorus and potassium fertilizers or compound fertilizers. Peach trees with large tree crowns should increase fertilization as appropriate. Peach blossoms have a high rate of flowering and fruit set, but too much fruit set will affect the quality of the fruit and reduce the value of the commodity. At the same time, it may lead to weakened tree vigor and shortened life span.
Sparse fruit should be cleared in time and it should be sooner rather than later. Leave buds and flowers first, and then thin fruit 1-3 times. When sparse, spend 1-2 flowers per section, flowers on branches without leaving fruit. After the first two weeks of sparse flowering, the fruit was thinned to remove the strong fruits in the small fruit, the deformed fruit, the sky fruit, the disease fruit, and the leave branch. Peach trees with high fruit setting rate should be sparse twice, and peach trees with low fruit setting rate should be sparse once. The final determination should be made at the time of nuclear hardening. Peach trees are susceptible to pests and diseases such as anthrax and aphids in the spring. The prevention and treatment of early peach plant pests and diseases should be before the peach tree flower buds and leaf buds do not stick out from the peach tree epidermis. Bordeaux mixture should be sprayed once with lime sulfur. The two liquids should not be sprayed at the same time and should be separated by 5-7 days.
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