Towel gourd cultivation: how to prevent premature senility in summer?

How does summer towel gourd prevent and cure premature senility? Please introduce the prevention and control methods in summer with the change of temperature, light and other environmental factors, towel gourd plant stems and leaves grow fast, root aging fast, if not managed properly, it is easy to cause plant premature senescence. Towel gourd premature senility can be prevented with reference to the following methods: reasonable retention of gourd: vegetable farmers generally take five or six leaves to leave a gourd when planting towel gourd in winter, which can not only ensure adequate nutrition, but also ensure exuberant plant growth. When growing towel gourd in summer, vegetable farmers usually leave a melon with three or four leaves, but they must pay attention to the plant growth and decide to keep the melon according to the growth trend. On the vigorous growth, one melon can be left with three or four leaves; on the weak growth, the remaining melon should be appropriately reduced and changed to five or six leaves to leave one melon, otherwise it will lead to heavy plant burden, poor growth and development of roots, stems and leaves, and eventually cause premature senescence of the plant. It is suggested that vegetable farmers should adjust at any time and retain melons reasonably according to the plant growth status. Adjust the temperature in the greenhouse: the suitable temperature for towel gourd plant growth is 25-32 ℃ in daytime and 15-20 ℃ at night. The indoor temperature rose rapidly after the Beginning of Summer, so timely measures should be taken to reduce the greenhouse temperature. First of all, to strengthen ventilation, you can open the shed door at noon and increase the vent. Secondly, the setting of sunshade net, sunshade net is mainly by blocking part of the sun, reducing heat to reduce the greenhouse temperature. The light is weak in the morning and afternoon. In order to improve the photosynthetic efficiency, the sunshade net should be used after 11:00 to before 3pm. Third, reasonable watering to reduce the ground temperature. Water evaporation will absorb a lot of heat, reasonable watering is also an important measure to reduce the temperature in the greenhouse, vegetable farmers should use it reasonably. Skillful application of fertilizer and water: towel gourd likes moisture, is not resistant to drought, and the suitable soil water content is 70% 85%. It should be watered in time to prevent towel gourd plants from premature senescence due to drought. Vegetable farmers should, under suitable weather conditions, pour water after coring, two days after dipping melons, and two days before picking melons, which can promote melon strips and plant growth and prevent premature senility. During the fruiting period, vegetative growth and reproductive growth are very exuberant, and there is a great demand for nutrients, so vegetable farmers should pay attention to topdressing in time to ensure adequate nutrition supply. Scientific fertilization: it is best to test the soil before planting and apply fertilizer according to the soil nutrient status. Because the fertilization habits of vegetable farmers are different, the nutrient status of the soil in the greenhouse varies greatly. In some greenhouses, potassium fertilizer seriously exceeds the standard and nitrogen fertilizer is insufficient, while in some shed rooms, the nitrogen fertilizer seriously exceeds the standard and potassium fertilizer is insufficient, and the situation is different. There are also differences in the focus of fertilization. During an interview with the Shouguang soil and Fertilizer testing Center, the reporter learned that the content of potassium in the soil of a vegetable farmer's greenhouse in the Luocheng street of Shouguang City reached 2000 mg / kg, which has far exceeded the plant demand. At this time, if potash fertilizer is applied again, it must affect the normal growth and development of towel gourd. Prevention of diseases and insect pests: generally speaking, towel gourd has strong disease resistance and few diseases, but the high temperature and humidity environment in the greenhouse in summer can easily lead to the high incidence of bacterial diseases and virus diseases, so preventive measures should be strengthened in management. Most bacterial diseases occur after falling vine, so 3000 times of agricultural streptomycin should be sprayed before falling vine to prevent it. For the prevention of virus diseases, the focus is on the prevention and control of virus-transmitting pests: setting up insect control nets to prevent the spread of pests inside and outside the shed; hanging yellow armyworm boards to stick to kill pests in the shed and observe the situation of pests; timely use of drugs, such as acetamiprid, imidacloprid and so on. At the same time, it is also necessary to spray Ningnanmycin and mushroom protein to improve plant disease resistance and prevent virus disease. 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