In summer, the green onions grow into a vigorous stage. At this time, the main goal of management is to promote leaf growth and longevity, leaf sheath (bright white) elongation, thickening, weight gain, strong and stable roots. The technical measures for field management can be summarized in four farms: Li Qiu, Onion, Mo, Relaxation, Four-Fat, Seven-Water, Continuous Attack, Three-Prong and Two-Pedrain Rainfall, Prevention of Three Diseases and Six Worms. One, four fertilizers and seven waters, successive attacks on four fertilizers refers to fat (in early August), Mushi quality decomposed fertilizers 2000-2500 kilograms, urea 10 kilograms or ammonium bicarbonate 20-25 kilograms; promote leaf fat (in late August) Mushi urea 20 kg or ammonium bicarbonate 40-45 kg, potassium carbonate 25 kg; attack sheath (lighter thickening) fertilizer (in early September) Mushi urea 15 kg or ammonium bicarbonate 30-35 kg, potassium sulfate 20 kg; Heavy sheath (light weight gain) fertilizer (in late September), Mushi urea 20-25 kilograms or ammonium bicarbonate 40-45 kilograms, such as intercropping wheat per acre increased by 30-35 kilograms of superphosphate. Qishui is pouring water with each of the top dressings. It also has to pour water in each of the upper, middle and late stages in October to ensure that the onion grouting water is used. Keep pouring feet and keep the floor moist. At that time, the frequency of watering can be appropriately increased or decreased according to the situation of floods and droughts. Second, the three-pronged and two-ply rain-dried three-mast is the mid-August mid-tillage tillage and the eradication of the grassland; at the end of August, the deep plutonium, the cheki, and the gully are filled with flat ridges; in early September, the plutonium is cleared and the weeds are removed. Two soils were drilled in mid-September and late September respectively. Remember not to injure the leaves and not to infuse the leaves in order to help the light blue elongate and prevent lodging. In the autumn rain season, we must pay attention to moisture prevention and drainage. Do not accumulate water in the onion ditch, in case of rain, fine weather and hot weather, you have to pour water to reduce the temperature. When the surface is slightly dry, it is necessary to immediately loosen the earth and ventilate and cool down to prevent "turning green onion (light blue rot)". Third, prevention and control of three diseases, six diseases, three diseases that are downy mildew: spraying 80% of the phosphorus phosphorus aluminum 400 times the wettable powder or 72% Precedence 600 times liquid. Botrytis cinerea: Spray 70% Mancozeb WP 400 times or 50% Prohaicine WP 1000 times. Purple spot: Spray 75% chlorothalonil wettable powder 500 times or 64% antivirus powder 400 times. The six insects are leafminers, leafminers, and thrips, sprayed with 40.8% of lorengen emulsion 1000 times or 75% of lavein emulsifiable concentrate 1500 times; cabbage caterpillar (cabbage butterfly): sprayed with 0.5% agallonite 1500 Double liquid; Spodoptera exigua: spraying 5% Suppository EC 2500 times or 5% cypermethrin 3,000 times and 90% Wanling Powder 3000 times; Onion Scallion (Onion Fly): Use Scallion (50% phoxim) Emulsifiable concentrate 250 ml + 40.8% Locust emulsion 250 ml) 1500 times liquid or 20% thick Solvent Conodol 7000 times liquid irrigated at risk. China Agricultural Network Editor
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