At present, greenhouse vegetable production enters the middle to late stage of management, and management should be strengthened to prevent premature senescence and ensure the harvest of high yields of spring greenhouse vegetables.

1. Ventilation, humidity removal and heat preservation: When the temperature of the air shed reaches 26°C in the mid-day, it is necessary to pay attention to the timely discharge of sheds, humidity, and cooling, and to control the incidence and prevalence of diseases such as downy mildew and gray mold. After 4:30 in the afternoon, the shed shall be kept in a timely manner. The night temperature shall not be less than 10°C.

2, pruning rights, removal of old leaves and diseased fruit: from mid-April to May, the greenhouse tomato, eggplant, cucumber, etc. into the flowering, the results of the late, should be good pruning, removal of disease, old leaves and diseases Fruits; cucumbers do a good job framed, tied vines, so that there is a good ecological environment in the shed, while reducing the spread of shed vegetables disease and then infect. Pruning should be done at noon on sunny days. The wounds will heal quickly, and it will not be pruned on cloudy or rainy days.

3, timely fertilizer: In order to ensure the future growth of greenhouse planting eggplant, melons, the root application of compound fertilizer and thin human and animal manure, in addition should be spraying potassium dihydrogen phosphate and other foliar fertilizer. Generally, fertilizer is applied once every 7-10 days, and 10-15 kilograms of urea can be topdressed per acre. 0.2% potassium dihydrogen phosphate plus 0.2% urea or 0.2% phyto-nutrient treasure can also be used as foliar spray to meet eggplant vegetables. A large number of flowering results require fertilisers. Watering enough but not to avoid flooding irrigation, so as not to root, disease.

4, the rational use of growth regulators: tomato, eggplant should be reasonable use of 2,4-D. General application of 15-20ppm in April-May, 2,4-D using drip (stem) method, in the use of regulators can be added 0.1% of fast-king and other agents, have a certain control of gray mold.

5, to strengthen the prevention of pests and diseases: greenhouse vegetables in this season is prone to viral disease, blight and aphids, due to the different types of vegetables show symptoms, farmers can choose according to the actual situation 83 sensitizer, thiophanate-methyl, carbendazim, imidacloprid And other drugs for prevention and treatment.

6. Reinforced sheds: This year, strong winds occur frequently. Attention should be paid to the reinforcement of scaffolds and sheds. Reinforcements should be added to the rods, arches, lamination lines, or membrane ropes to avoid wind blowing and damage. Spray the diluted new high-fat film on the vegetables to help the vegetables recover their vitality and restore the vegetable potential. It can also prevent the sun from being damaged by sunlight, moisture and drought resistance, fruit preservation, suffocating sterilizing and anti-virus, and suppressing the evaporation of high-temperature pesticides.

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