It is important for lemon to be scientifically managed.
Lemon is the key to ensuring lemon yield and improving lemon quality during the summer when the young fruit is swollen and the summer shoots are drawn. Therefore, it is important for the lemon to be scientifically managed.
It is important for lemon to be scientifically managed. The details are as follows:
1. Soil, fertilizer and water management
1. Water management. Due to the high rain in summer and the high temperature, the orchard is too humid. The orchard should be drained in time, and the drainage ditch and back ditch should be strengthened. The depth of the ditch depends on the position of the soil. The dry ditch is 70-80cm deep and 60cm wide. One soil and two soil trenches are about 40cm deep and about 30cm wide. In case of drought, when the soil water content is less than 60%, water should be poured immediately to ensure sufficient water supply during the young fruit period. If the water source is insufficient, it can be used. Irrigation of water-saving points, and covering the tree tray with straw and straw to humidify and cool down.
2, strong fruit fertilizer. According to the weather conditions, determine the fertilization time, according to the soil fertility and tree potential to determine whether to increase or decrease the amount of fertilizer.
It is applied from the end of June to the end of July 20, and it is suitable for the application of 2 kg of lemon special fertilizer and 80-100 kg of human and animal manure water within 25 kg of the current year. When the yield is increased by 10 kg, 0.5 kg of special fertilizer is added.
Second, summer pruning
For the adult result tree: First, timely remove the summer shoots, avoid the shoots and fruits to compete for nutrients, and reduce the secondary physiological drop; second, cut off the weak branches, diseased branches, dense branches, and long branches to ensure the ventilation and light transmission inside the tree; For some old weak trees with few fruits, moderately re-cut and strengthen the management of fertilizer and water before the summer solstice; topping the saplings, promoting the expansion of the canopy and drying and shaping.
Third, pest control
In summer, the main pests of lemons are red-yellow spiders, scutellaria, rust tick, anthracnose, and scab.
1, red and yellow spider
The red-yellow spider is mainly harmful to the leaves. The red spider causes the affected leaves to produce grayish white spots. In severe cases, the whole piece is grayish white and causes the leaves to fall. The yellow spider causes the affected leaves to appear on the sides of the main vein and between the main vein and the branch vein. Large yellow spots that can cause leaf deformity or shedding. If the damage is serious, we should do a good job of prevention and treatment.
Control agent: 124% of endangered emulsifiable concentrate 4000-6000 times liquid (only once a year); 220% broom emulsifiable concentrate 2000-3000 times liquid; 35% Nisola emulsifiable concentrate 1000-1500 times liquid; 420% four 螨螓 emulsified milk 2000 times solution; 5 0.3% azadirachtin emulsifiable concentrate 1000-1500 times solution; 645% crystalline stone sulphur mixture 250-400 times solution.
Any of the above agents may be sprayed evenly with water.
2, lemon Yaji
Lemon scorpion scorpion harms lemon leaves and branches, causing the leaves to yellow and fall off. In severe cases, the branches are dead; causing damage to the fruit, causing yellow spots, affecting the appearance quality of the fruit. When the damaged dead branches appear, they should be cut off and burned in time. Picking up the orchard that is lightly damaged, and controlling the orchard in the whole park. It is especially heavy and can be continuously controlled 2-3 times. The first control period is May 17-20; the second control period is May 29-June 1; the third control period is June 13-18.
Control agent: 13% annual emulsifiable concentrate 1500-2000 times liquid; 20.5% fruit scented oil 800-1000 times liquid; 348% lesbian emulsifiable oil 1500 times liquid; 440% giant ray 1000-1500 times liquid; 50.5 Bomeprite sulphur spray (used in June); 625% chlorpyrifos 1500-2000 times solution.
Any of the above agents may be sprayed with a new high-fat film uniformly sprayed with water.
3, lemon rust tick: mainly damage lemon leaves and fruits, causing gray fruit or black fruit, control period, in June-August, strengthen the inspection of the lemon garden, when the whole garden found a gray fruit (black fruit or rust When the tick is newly damaged, the application is immediately applied.
Control agent: 110% benzoin suspension agent 1500-2000 times solution; 220% broom emulsifiable concentrate 2000-3000 times solution; 320% four 螨螓 2000 times solution; 40.5 Bomegranite stone sulphur mixture.
Any of the above agents may be treated with a new high-fat film for water control.
4, lemon anthracnose, scab
In the case of more rain, it is easy to induce anthracnose and scab to cause fruit loss. In summer, drainage should be paid to reduce the humidity in the field; the fruit in the garden should be removed and burned intensively to reduce the number of pathogens; the drug control of anthracnose and scab can be done well, and the drug for controlling disease can be combined with the prevention and treatment of the disease. The application interval is 10-15 days, continuous application 3-4 times, and the pesticides are used alternately.
Control agent: 110% Shigao water dispersible granule 3000 times solution (therapeutic agent); 218% Bao Zhida emulsifiable oil 800-1000 times solution (therapeutic agent); 3 guard tree general; 425% Shi Baoke emulsifiable oil 1000 times solution (treatment Agent); 512% myclobutanil 2000 times solution (therapeutic agent); 670% methyl thiophanate wettable powder 600-800 times solution (therapeutic agent); 780% big raw M-45 wettable powder 600-800 times solution ( Protective agent); 880% mancozeb WP 600 times solution (protective agent); 90.5 Bomemei stone sulphur mixture (used after mid-June).
The above medicinal agents are optionally treated with water.
Fourth, lemon bagging technology
1. Bagging time: Lemon broccoli should be bagged from the end of June to mid-July; summer flowers should be bagged from August to September, and the growth time of lemon fruit after bagging should be 70-90 days.
2, the choice of bagging fruit: choose the early stage pest control, the fruit surface is smooth, the fruit shape is good, no disease and insect class, fruit fruit bag with a diameter of about 35mm.
3, the choice of paper sleeve: choose 50 grams of facial tissue, 40 grams of opaque wood pulp paper bag, required to have good moisture resistance, tensile strength, permeability, with alcohol drops on the surface layer is not dip, It is not rotten in the water, the water dripping on the surface is not diffused, there is pre-embedded wire, and the fist is used to reach into the fruit bag, and the naked eye is seen from the inside out without the trachoma.
4, the method of bagging: "one support two sets of three closes four twists": first use the fist to open the paper bag, then a fruit set of a paper bag, and the fruit placed in the middle of the bag, the bag mouth flat * in the handle , gather the mouth of the bag, and use a wire that is embedded in the side of the fruit bag to twist the handle to seal it.
5. Precautions for bagging: Spray the insecticide and fungicide evenly and thoroughly on the tree and fruit surface 1-2 days before the fruit bagging. After the fruit is dried, the bag can be bagged; if the stone sulphur mixture is used, Bagging should be carried out 5-7 days after application to avoid fruit burns; no application can be applied without pre-treatment, poor pre-treatment of pests and diseases can not be set, the syrup can not be dry, the dew can not be set, the rain can not be set, the high temperature at noon Can not bag, paper bag sealing should be down, after bagging, in case of drought, timely irrigation and straw cover.
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