First, improve lighting. In the shed, hanging sticks, reasonable pruning, and reflective films can be used to improve ventilation and light transmission, and reduce the incidence of pests and diseases. 1 reasonable trim. Only one or two prosperous shoots in the appropriate direction were kept in each extension head of the backbone, and the rest were removed. The result of rejuvenation is that the branches grow too prosperous, leaving only one flat oblique shoot before the fruit table shoots. Timely cut off pests and branches and eliminate fruitless branches. Appropriate short section shading tips. Sweep the fallen leaves and fruit, burn it or bury it deeply. 2 hanging fruit branches. First, use a 16-gauge wire to form a 22-meter grid in the shed, 1.8 meters above the ground. Use a string to pull the long fruit branch that is hanging down to the canopy and form an oblique branch. Transfer the long fruit branch to the branchless space. To the wire. 3 shop reflective film. Through suspending and trimming, a 0.3-0.4 m wide light-transmitting tape is left between the lines, and a 1-meter-wide aluminum foil single-layer reflective film is laid under the light-transmitting tape.
Second, reduce the humidity. Covering the membrane in the facility, after the hard core period, Li used ventilation and dehumidification, dredge irrigation and hole irrigation under the membrane, appropriately increased the temperature of the greenhouse, and eliminated water accumulation in time to reduce the relative humidity of the air, increase the transpiration rate of fruits, and reduce the occurrence of diseases.
Third, prevention and treatment of diseases. Before the plum blossoms, the branches are prone to infection with gum, causing the shoots to weaken, the buds not strong, and fruit settling difficult. Therefore, we must pay attention to inspecting the branches of plums and find that there are gel-like streams on the shoots. Use a knife to scrape off the gel, then apply a layer of lime sulfur residue, or Bordeaux mixture, or a 25% aqueous solution of soda. Or 1% potassium permanganate solution. Before flowering, spraying 0.6-0.8 bymide limestone aqueous solution or 600 times oxygen copper chloride aqueous solution, spraying the internal shoots 1 or 2 times to kill the bacteria adsorbed on the shoots, and then controlling the plum branches before flowering Infectious fluid.
After the Lishuguo young pods fall off, they are combined with foliar fertilizer to spray a mixture of 70% mancozeb WP 1000 times and 50% carbendazim WP 1000 times every 10 to 15 days to prevent and treat the perforation disease. Wait. In the spraying of fungicides, if spider mites occur, they can be mixed with 15% fluorenone EC 2000 to 3000 times or 1.8% abamectin 4000 to 5000 times. If aphids occur, they can be mixed with 10% imidacloprid WP 3000-4000 times.
Fourth, pest control. When germinating, spray 20% of net emulsion oil 1000 to 1500 times, or 10% of high efficiency cypermethrin EC 2000 to 4000 times, or 50% of special WP wettable powder 800 to 1000 times to effectively control overwintering worms , And has a good repellent and control effect on scarabs. After leaf spreading, combine the foliar application with spraying a mixture of 70% mancozeb 800 to 1000 times and 50% carbendazim WP 1000 times every 10 days to prevent disease and protect the leaves. When the fungicide is sprayed, such as aphids and moths, it can be mixed with 20% to 100% of a net of annihilated net EC. If spider mite occurs, it can be mixed with 15% fluorenone EC from 2000 to 3000 times, or 1.8%. Abamectin 4000 to 5000 times liquid. Application of 1.5% phoxim granules per acre 5 kilograms, control of earthworms and other underground pests.
Fifth, avoid mixed planting. Avoid mixing with other stone fruit trees to prevent pests from spreading to each other.
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