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Control the temperature in the cucumber breeding period to give the appropriate temperature, especially in the two true leaves, the temperature difference between day and night require more, the night temperature not lower than 10 °C ~ 12 °C. The temperature difference between day and night in the cucumber melon period needs to be larger. During the melon period, the daytime temperature should not exceed 30°C. At night, the temperature should be 16°C-18°C and the middle of the night should be 13°C-15°C. Ventilation should be strengthened to ensure normal pollination and fertilization. Make melons thick and thin and well-proportioned.
Rational fertilization applies base fertilizer, organic fertilizer and phosphorus and potassium fertilizers. Apply a small number of methods to the topdressing, catch the first fertilizer after harvesting, and then chase the fertilizer once every 10 days or so. Strictly control the amount of nitrogen fertilizer, use the formula fertilization technique with a ratio of N:P:K:5:6. Prevent plant growth. Spray 0.2% potassium dihydrogen phosphate in the late middle and late fertility period to prevent premature aging and enhance stamina.
Reasonable watering cucumber during the growth period, especially in the melon period, can not think of cucumber fertilizer water, a lot of top-dressing, irrigation, resulting in "running", but can not suddenly dry, suddenly. Sunny days should pay attention to watering to prevent water shortages. To control the amount of watering watering, especially in the fruit expansion period should not be excessive watering.
Strengthen the prevention of diseases and insect pests to diseases such as cucumber downy mildew, disease, and gray mold. In the early stage of cucumber growth, we must always pay attention to the discovery of “central diseased plantsâ€, remove the diseased leaves in time, and prevent the spread of infection. Prevention and treatment of diseases can be done by spraying aerosols without increasing the humidity in the sheds and preventing them from becoming more thorough. Use 45% chlorothalonil smoke agent per acre 250 grams, points distributed in the shed, in the evening one by one from the inside to ignite the cigarette smoke after the closed shed, generally 7 to 10 days 1 time, once every 2 to 3 times. For aphids, whitefly can be sprayed with 10% imidacloprid wettable powder, but also can use 22% dichlorvos smoke smoke. In addition, it is necessary to promptly remove the deformed fruit so that the nutritional supply can develop a normal melon strip.
In the production of cucumber, there are often malformed melons such as sharp beaks, big bellies, slender waists, and curved melons. This not only affects the yield, but also seriously reduces the quality of the goods, causing great losses to the vegetable farmers. To prevent the occurrence of abnormal cucumbers in greenhouses, the following measures can be taken: