Cucumber, which is a common and popular vegetable in our life, is used for autumn and wintering. Can meet the needs of the off-season market, but also bring good economic benefits to growers. Let's take a look at the problems and management techniques that are easy to occur in autumn and winter cucumber cultivation! What are the problems with cucumbers in the greenhouse in autumn and winter? Planting cucumbers in autumn and winter is planted using the greenhouse to simulate the environment required for the growth of cucumbers. Its space is relatively closed and limited by light. Therefore, greenhouse cultivation of cucumbers, if not properly managed, is very likely to cause deformed melons. Such as: bending, the middle is thin and thick, that is, we often say that the thin waist melon, the drum belly melon, that is, the two small and the middle big, and so on, the strange shape of the deformed melon. A large number of deformed melons will not only reduce the yield of our cucumbers, but also affect their quality, and the commerciality will be much lower. The appearance of malformed cucumber is inseparable from our management, such as improper control of temperature and humidity, unreasonable fertilizer and water, lack of nutrients, mechanical damage to farming operations, pests and diseases. Timely and targeted management can greatly reduce the chance of deformed cucumbers and increase yield and quality. How to manage cucumbers in autumn and winter greenhouses? 1, variety selection Choosing a suitable variety is a prerequisite for avoiding or reducing the appearance of malformed melons. Try to use strong disease resistance, high yield, suitable for local climate growth, low temperature tolerance, low light tolerance, and strong parthenocarpic ability. 2, temperature and humidity control Proper control of temperature and humidity, whether for spring, autumn, and wintering cucumbers, is an important factor in reducing the appearance of malformed cucumber. At the seedling stage, the greenhouse temperature is recommended to be around 18-25 degrees Celsius during the day and around 15 degrees Celsius at night. Especially at night, the temperature should not be too high to avoid the influence of flowering and fruit setting, and it should not be lower than 15 degrees Celsius for a long time, otherwise the plant may have poor growth. After entering the flowering and melon period, the daytime temperature should not exceed 30 degrees Celsius, it is recommended to be around 21-27 degrees Celsius, and at night it is around 15-18 degrees Celsius. At noon, the window should be opened and ventilated, and the relative humidity in the shed should be kept at 8-90%. The pollination must be uniform, so that the melons can be evenly distributed, and the deformed melons can be reduced due to pollination quality. 3. Management of fertilizer and water During the growth process of cucumber, depending on the growth situation, the topdressing and fattening supplements the nutrients. This will not only avoid at a critical time, but also reduce the appearance of malformed cucumbers, while also providing nutrients for cucumbers in time to improve yield and quality. Nitrogen and potassium fertilizers are required during the growth of cucumber, and it is necessary to stabilize or control the phosphate fertilizer. However, it is not possible to over-apply nitrogen fertilizer. During the melon cultivation, it is not possible to apply a large amount of topdressing and watering. The soil moisture should be uniform and uniform, and it should not be neglected; usually watering once every 5-10 days. Topdressing is best carried out by soil testing and formulating, so that the amount of each element can be determined; harvesting 1-2 times of cucumber to catch a fat. In order to prevent premature aging of plants, 0.2% potassium dihydrogen phosphate water should be sprayed in the middle and late stages; after the melon is planted, in order to prevent the lack of boron in the cucumber, boron water soluble fertilizer is sprayed once every 20 days. 4. Prevention and control of pests and diseases Pests and diseases are also an important cause of malformed cucumbers. Common types are downy mildew, gray mold, blight, aphids, whitefly and so on. Planting in a greenhouse is a relatively closed environment. We usually need to find early treatment early to prevent it. When we find a diseased leaf disease plant, we must promptly remove it and take it out of the greenhouse to prevent spread and spread, and use it as soon as possible. Downy mildew, gray mold, and epidemic diseases can all be used to prevent fumigation in the shed. Once a week, it has a good effect, pay attention to personal safety when fumigation. For aphids, whitefly, we can use imidacloprid to control the stem and leaf spray, and the malformed melons are removed in time, and each tree is kept for about 3 melons, so that the plants can maintain a good nutrient state. Cucumbers in autumn and winter can bring greater benefits to growers. The same planting cost is higher than that of seasonal planting. Therefore, in order to prevent the poor quality of greenhouse cucumbers from affecting the benefits, growers must do a good job of introducing the above-mentioned small series. Key points of management measures. 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