Spring fruit tree management five note

1. After thawing topdressing watering soil, quick-acting K, N, and P fertilizers should be pursued, and watering of whole points and soil protection should be carried out. Topdressing watering needs to meet the physiological activities such as fruit tree branching, leaf development, and flowering.

Second, scrape the tree old rough skin old rough skin is the wintering of many germs, eggs, parasitic, scrape the old rough skin before germination, and concentrated burning, can eliminate a large number of overwintering pests, reduce the number of pests and diseases, can play a more effective pest control Effect. More attention should be paid to the curettage of the rot disease. After the scraping, the smears of thiazolyl, octomycin, thiophanate-methyl, and other agents should be applied in time. After 1 week, the drugs should be applied once again to prevent recurrence. The main lesion or main branch over 1/4 of the tree lesions should be bridged and rejuvenated in time.

Third, the Pharmacy Clearance Pharmacy Clearance Park should seize two points. The first is to grasp the appropriate application period. The critical period of application is when the apple tree buds are green, and it is generally the most critical from the end of February to the middle of March before the budding of the fruit trees. If the application is too early, the pests and diseases do not produce any effect, and the desired effect cannot be achieved. If the application is too late, the buds and buds may be harmed by the pests, and the medicament may even cause phytotoxicity to buds and buds. The second is to choose a suitable high-efficiency, low-toxicity drug species. The whole park sprayed 3-5 Baume degree lime sulfur, or use insecticide, fungicide mixed spray, insecticide optional chlorpyrifos or acetamiprid, fungicide optional thimethanone or carbendazim, etc.; orchard winter When there is a large number of leafhoppers, they should also be added with acaricides such as peony, and spray the whole tree carefully after mixing according to their respective recommended amounts to kill germs and overwintering pests on the surface of stems and in the shallow layer of bark. When applying pesticides, it should be comprehensive, meticulous, and considerate to ensure the amount of liquid applied.

Fourth, reasonable pruning The pruned orchard can be trimmed before the spring to adjust the tree structure. Excluding some overly dense and influential main branches, competing branches, and absurd branches on the back, opening the light path will help to improve the quality of the internal litchi; more attention should be paid to the dense branches, leggy branches, and excessive peripheral branches. Shearing is conducive to moderate tree vigor and ventilation. After the apple orchard is cut in the spring, the amount of mu sticks is generally kept at 70,000-80,000 pieces.

Fifth, thinning fruit after fruiting can be set according to the spacing method, generally leave a fruit every 20-30 cm. Thinning and fruit thinning are one of the main measures for producing high quality and high grade fruit.