Pulling branches through the branches in the summer can solve the problem that winter shear can not solve to reduce the amount of branches. Generally, after the harvest in June, the branches are opened and the tree body response is mild. The backs are not easy to shoot. The main branches and lateral branches of the branches are preferably 60 to 70 degrees, and other branches can be drawn to 80 to 90 degrees.
Picking a short cut to the vigorously growing trunk extension topping, not rushing, and competing to focus on topping control. When the trunk is extended to 50 centimeters in length, it is picked up and 10 centimeters removed. When the main branch is 40 centimeters in length, 10 centimeters (leaves are left) are removed, and 10 centimeters are picked up for the upright branches that grow after the topping. From the end of May to the beginning of June, the trifoliate shears (three large lobes are left at the base) are performed on upright branches or overly strong lateral branches.
The thinning of branches in summer is generally performed from late May to early June after fruit picking (sparse branches are best in July). The purpose is to eliminate overlapping, upright, dense, over-strength and perennially severe effects on light. Large branches to improve the ventilation and light conditions within the canopy, balance the tree potential, after the fruit is harvested, the branching wounds heal easily, and the tree vigor is weakened.
Twisting the tip of the shoot from the end of May to the beginning of June. When the tip is not yet lignified, the tip of the tip will be twisted. The standing branch, the competing branch, and the inward temporary branch will be turned about 180 degrees from the base of the branch and gently twisted by 180 degrees. Helps to form flower buds.
Appropriate girdling for girdling large cherry trees can promote the formation of flower buds, increase the rate of fruit set and fruit quality, but after girdling, the wounds heal slowly. The girdling width should not exceed 0.5 cm, and the vigor of the cherry is also important. Different, especially the trees with less organic fertilizers, are prone to flow, and therefore should be used with caution in production.
Timely watering drought in summer, pouring hard water, pre-harvest water and post-harvest water. According to the law of northern rain, it is necessary to pay attention to drought prevention in late June. According to the soil moisture content, timely irrigation; and in July-August for the rainy season, we must do a good job of drainage prevention work in the park.
Paclobutrazol entered the three-year-old Wangda cherry tree, and Shandong, Henan, and other places applied paclobutrazol in late April and mid-June, and applied 5 grams per plant. According to the test, paclobutrazol was effective in early May, and most branches were capped in the middle and early June, and the flowering rate was 95%, while the flowering rate without paclobutrazole was only 20%.
Appropriate top-dressing fertilizer immediately after top dressing, preferably compound fertilizer, 0.2 to 0.3 kg per plant to promote flower bud differentiation.
The main diseases and pests of cherry in the prevention and control of pests in summer are: fluid gum disease, Morus alba, bridge insects, and peach leaf miners. Glue disease, in the early flow of plastic with a knife in the lesions cut several times out of sap, and then brushing lime sulfur has a certain effect. Sang Baicha: In the middle of May, the first generation of nymphs sprayed 48% of 1500 times of Lethbine or 30% of Waxanthin 1000 times to control its damage. In the first half of July, the second generation of nymphs was sprayed to control the nymphs. . Bridge insects and peach leaf miners can be sprayed with 2.5% enemy milk emulsion 3000 times 25% quizol EC 800 to 1000 times for control.
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