Strengthen soil, fertilizer and water management
1. Continue to cover the tree tray or intercropping properly to achieve moisture retention and fertilizer retention, improve soil permeability, reduce surface temperature, and create a good root growth and development environment.
2. Top-up application of young fruit swelling fertilizer, with nitrogen, phosphorus, and potassium (plant dosage 150-200 grams) as the main plus medium trace element fertilizer, apply more farm rot fertilizer to achieve diligent and shallow application.
3. Young trees and seedlings should be applied in combination with high nitrogen fertilizer and the above-mentioned flush fertilization. Once every half a month, the plant can apply 50 to 100 grams of high-nitrogen fertilizer and 25 grams of flush fertilization. Shallow.
4. Appropriate supplementation of foliar fertilizers, focusing on medium and trace elements, which can be carried out simultaneously with application of pesticides (note that excessive use is not allowed).
5. Pay attention to the drainage of the park to reduce the damage.
6. Properly control ground weeds, which can be cut manually or mechanically to avoid excessive use of herbicides.
7. The newly planted seedlings should be released from the film in time in early May to avoid damage to the root system caused by accumulated temperature.
Tree management
For thinning and fixing fruits, the principle of strong leaves is appropriate to retain more fruit, and weak trees and weak branches have less or no fruit. It is recommended to use 2, 3, 4, and 5 fruit retention methods to eliminate disease and insect fruit, small fruit, deformed fruit and overdense fruit.
Sprouting and topping young trees are mainly plastic surgery, focusing on cultivating the tree shape, consolidating the skeleton of the tree body, cultivating a strong trunk, main vines, and lateral vines. Individual weak seedlings are shortened to promote growth. The main seedling cultivation site is smooth and straight, and 2 to 3 branches can be kept more than 20 cm above the ground. The tops of mature treetops are obviously thinner, and they are shallowly topped when bent to avoid entanglement and reduce the shade of the canopy. The sturdy branches at the base of the lateral vines are properly lengthened and used as fruiting branches in the coming year.
Bagging begins in mid-to-late May, strictly in accordance with bagging regulations, pay attention to the wetness and expansion of the paper bag, the young fruit hangs in the center of the paper bag, and the bag mouth should be tight.
Film release The film of the grafted seedlings was released that year, check the grafting site for scars in time, and release in time in late May.
Re-cutting of male plants means trimming after flowering, cut off the thin and weak branches on the inner canopy of the male plant and skeleton branches, and then cut back the skeleton branches appropriately to cultivate new healthy branches.
Pest control
The main pests to be controlled this month are leafhoppers, leaf curl moths, chafers, scale insects, etc .; diseases include gray mold, brown spot, anthracnose and so on.
Physical control uses insecticidal lamps, sweet and sour liquids, and sexual attractants for physical control.
One week after the chemical prevention and treatment, use 48% chlorpyrifos 1200 times + 50% sucralose 1000 times, or 25% prochloraz 1500 times + 70% Antaisheng 500 times; use 10% cypermethrin 1500 times + 70 % Pinrun 600 times, after bagging, use 22% Tefalco 5000 times + 40% Xinsheng 5000 times or 80% Dasheng 600 times. The above drugs can be sprayed with 2000 times of brassinolide.
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