Strengthen pest control Early autumn defoliation serious Orchard should pay attention to catch the rain before and intermittent sunny days spray, can continuously spray 80% of Dasheng M-45 wettable powder 600 to 800 times, 68.75% easy to protect 1200 times, for spots Severe defoliation can spray 50% acetaminophen wettable powder 1000 to 1500 times, 10% polyamycin WP 1000 to 1500 times, 4% agricultural anti-120 water agent 600 times to increase bacteria off the second agent 600 ~800 times liquid. Aphids, spider mites, and leaf-feeding pests can be severely added with 1.8% avermectin EC 3000 times or 20% chlorsulfuron EC 2000-4000 times. Yellow-leaf diseased fruit trees can be applied (1 to 1.5 kg/plant) or foliar spray (0.3% to 0.5%) ferrous sulfate to reduce the incidence and enhance photosynthesis.
Overcoming the influence of adverse weather, timely recharging moisture in the dry period to keep the soil moisture stable. During rainy periods, it is necessary to build rain collection pits and irrigation and drainage ditches. Rainy days will be drained out of the orchards in time, or they will be discharged directly into the rain collection pits in order to prepare for drought. Post-flood plots should be drained and dredged in time. Spray 27% high fat film 300 times before heavy rain to prevent air hole plugging.
Strengthen Soil Fertilizer Water Management Vigorously implement a farming system with inter-row grass and tree-pan covering. After autumn, fertilization should be based on soil analysis and leaf nutrient diagnosis based on formula fertilization, mainly organic fertilizer, control of nitrogen fertilizer application, increase phosphorus and potassium fertilizers, and appropriate outside root dressing. Soil management should control the water supply and maintain moderate drought to prevent the growth of the shoots. For trees that have emerged flowering, deep turning can be carried out in combination with fertilization, and some small root systems can be properly cut off to weaken the shoots, inhibit the growth of autumn shoots, and slow flower buds germination.
The pruning of autumn scissors should be strictly controlled and the length of branches must be properly removed. The branches should be properly removed, the branches should be erected, and the weak branches should be cut short and short. In particular, heavy and short cuts should be avoided so as to avoid irritating a large number of tender autumn shoots or cause flowering; The quantity should be strictly controlled, not exceeding 30% of the total leaf mass of the whole tree; using PBO technology instead of circumcision, in particular to eliminate the main girdling, bridges, skin grafts and other remedies should be promptly taken for circumcision and poor wound healing. Measures.
The staged harvesting by stages can overcome the secondary flowering of apple and guarantee the output of the following year. It is generally appropriate to pick three or four times in production.
Remedial measures In the event of signs or signs of flowering in the fall, early measures should be taken to spray PBO 200-fold paclobutrazol 300 times to inhibit flower buds germination and promote their continued differentiation. The fall flowering in production must be promptly removed in order to avoid further nutrient loss in the subsequent fruit set. In addition, in the year of autumn flowering, the winter shear was mainly made of light shearing, leaving as many flower buds as possible, properly eradicating upright branches, leggy branches, and retracting drooping branches to prepare for the second year of flowering results.
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