First, to strengthen fertilizer and water management, and increase tree vigor. In August, it is the period of fruit expansion of late-maturing varieties, but also the flower bud differentiation period. In order to ensure the nutrient requirements of the tree, top-down compound fertilizer or urea, diammonium phosphate, and potassium sulfate are applied underground. Mixed fertilizer. Pay attention to the weak tree vigor to increase the amount of nitrogen fertilizer, and the ratio of nitrogen, phosphorus and potassium should be 1:0.6:0.8. Phosphate fertilizer was applied after fruit picking in the previous year. This time, only available nitrogen and potassium fertilizers can be applied. The specific amount can be flexibly controlled according to the size of the load and the situation of tree vigor.
Second, timely prevention and control of pests and diseases, protection of the leaves in August the focus of pests and diseases is brown spot disease, Hawthorn red spider, white spider (spotted spider mites) and so on. Compared with the same period of last year, the incidence of brown spot was lighter this year, and some orchards were neglected to prevent and treat the disease. It is estimated that it will happen seriously in late August, and friends of farmers should not take it lightly. Bordeaux fluid has excellent control effect on the disease, and it is used once before mid-August. Afterwards, it is treated with Dasheng M-45, Lactobacillus, Tortoise, Carbendazim and other fungicides. In addition to the thorough and uniform spraying of leafhopper pests, common acaricides are not effective for all species (eggs, raccoon, and nymphs) of cockroaches, and different types of acaricides must be used in combination to achieve an ideal result. effect. In addition, the agents that control spider mites do not necessarily prevent white spiders, and the orchards that are endangered by white spiders can use abamectin (schizophylline) insecticides.
Third, pay close attention to the summer cut, to ensure that the tree air and light in time to clear the internal hemorrhoids, back and peripheral branches, leggy branches. Shrinking and cutting branches, dragging branches and branches. Shears too many lateral branches on large branches. For transfer between the lines, retract to the ideal branch at the back and open the line. In short, after the summer cut, it is necessary to ensure that the tip does not touch, the leaves do not grind, the branches on the tree are straight, and the shadow of the underground plum blossoms, so that the light transmittance of the crown can reach more than 30%.
Second, timely prevention and control of pests and diseases, protection of the leaves in August the focus of pests and diseases is brown spot disease, Hawthorn red spider, white spider (spotted spider mites) and so on. Compared with the same period of last year, the incidence of brown spot was lighter this year, and some orchards were neglected to prevent and treat the disease. It is estimated that it will happen seriously in late August, and friends of farmers should not take it lightly. Bordeaux fluid has excellent control effect on the disease, and it is used once before mid-August. Afterwards, it is treated with Dasheng M-45, Lactobacillus, Tortoise, Carbendazim and other fungicides. In addition to the thorough and uniform spraying of leafhopper pests, common acaricides are not effective for all species (eggs, raccoon, and nymphs) of cockroaches, and different types of acaricides must be used in combination to achieve an ideal result. effect. In addition, the agents that control spider mites do not necessarily prevent white spiders, and the orchards that are endangered by white spiders can use abamectin (schizophylline) insecticides.
Third, pay close attention to the summer cut, to ensure that the tree air and light in time to clear the internal hemorrhoids, back and peripheral branches, leggy branches. Shrinking and cutting branches, dragging branches and branches. Shears too many lateral branches on large branches. For transfer between the lines, retract to the ideal branch at the back and open the line. In short, after the summer cut, it is necessary to ensure that the tip does not touch, the leaves do not grind, the branches on the tree are straight, and the shadow of the underground plum blossoms, so that the light transmittance of the crown can reach more than 30%.