1. Variety selection: Good cucumber varieties have high production potential, which can be obtained under suitable environmental conditions. At present, cucumber varieties suitable for winter planting in our region mainly include Jinyou 30, Yuyou 3, Jinyou 3 and Xintai Mici. 2. Suitable sowing date: The best sowing date for winter cucumber is September 25th-65438+1October 5th. Sowing too early, because of the long sunshine time and high temperature, cucumbers only grow vines without melons. In severe winter, vines are weak and have poor cold resistance. Sowing too late, due to low temperature and short sunshine, cucumber reproductive growth is vigorous, nutritional growth is weak, and plants cannot be produced, which affects cucumber yield and thus affects benefits. Third, on-site management

1, temperature management The temperature is kept at about 30℃ in the morning on sunny days, and it drops to 20 ~ 25℃ in the afternoon; Maintain at 16 ~ 17℃ in the first half of the night and at 1 1 ~ 13℃ in the second half of the night. Generally, we use ventilation to adjust the temperature here, and the greenhouse is mainly natural ventilation.

2. Topdressing should be combined with watering at the fruiting stage, with topdressing of 45 kg urea, 75 kg potassium sulfate or high nitrogen and potassium fertilizer 150 kg per hectare at one time.

3. Water management After planting, the seedlings need to be watered 1 time. When cucumber grows to 12 leaves, water it for the second time. After entering the fruiting period, water according to the growth and weather. It is best not to water cucumber 7 ~ 10 d before vine falling, so as to reduce the water content of stem and vine tissue and enhance the toughness of stem and vine tissue.

4, plastic surgery In the case of more female flowers in the main summer, the early side branches below 6 ~ 8 knots should be removed in time to reduce nutrient consumption. When the main vine grows to 25 ~ 30 true leaves, pick the core, and then increase the application of nitrogen, phosphorus and potassium fertilizer appropriately.

Fourth, pest control.

1, 75% Baijunjing wettable powder 500 times+thiophanate-methyl 500 times or 600 times 64% antiviral alum wettable powder can be sprayed at the early stage of downy mildew; In the middle stage of the disease, DuPont Kelu, Encore+Pinrun mixture or Cecmarin+Mancozeb mixture were used. See the product description for the dosage. When spraying, spray evenly on both sides. All the diseased leaves were removed in the later stage of the disease, and the disease was prevented by high temperature stuffy shed.

2. Bacterial angular leaf spot. Spraying neophytomycin 5,000 times solution, 77% chlormequat 400 times solution, 47% Jialenong wettable powder 600-800 times solution and 70% metalaxyl copper wettable powder 600 times solution at the initial stage of the disease, the above agents can be used alternately, spraying 1 time every 7-65 days for 3-4 times continuously.

Liriomyza huidobrensis. Use fly-killing paper to trap and kill adults, and set 225 trapping points per hectare from beginning to end, and put L fly-killing paper at each point to trap and kill adults, and change it every 3 to 4 days 1 time; When there are five larvae on the leaves of damaged crops. Before the 2nd instar, the larvae began to move to the leaf surface at 8 ~ 1 1, or when the mature larvae emerged from the wormway, Spraying 1.500 times of 25% Sakamoto net EC, 3000 times of 1.8% avermectin EC, 2000 times of 5% cis fenvalerate EC, 500 times of 25% dimehypo, 800 times of 1.5% avermectin EC 3. The best control time is 8: 00 am-12: 00 am at the peak of adult emergence. In addition, biological control methods can also be adopted, such as releasing wasps such as wasps to parasitize liriomyza huidobrensis. The effect is better. V. Problems in Simple Cultivation of Cucumber in Greenhouse (1) Deformed Cucumber

Including curved melon, pointed-billed melon, pot-bellied melon, honeycomb melon and so on. 1. The reason why the curved melon appears is that the temperature and humidity at seedling stage are not suitable or the nutrition supply is insufficient, which leads to poor ovary development and naturally develops into curved melon; When cucumber is hypertrophy, improper field management is also easy to form curved melon. The better way to avoid the above situation is to create good environmental conditions for flower bud differentiation of cucumber during seedling raising, and at the same time strengthen fertilizer and water management during the expansion period of melon strips.

2. The causes of melon disease are poor fertilization and persistent high temperature in the shed. Therefore, when the temperature in the greenhouse exceeds 30 degrees Celsius, it needs to be ventilated in time to prevent the occurrence of high temperature. After beginning to sit on melons, we should strengthen the management of fertilizer and water, keep the soil moist and cultivate strong seedlings.

3. One of the reasons for the appearance of pot-bellied melon is poor fertilization, and the other is zinc deficiency in the soil. Therefore, the varieties with strong parthenocarpy should be selected as the main varieties in greenhouse, and on this basis, zinc sulfate should be applied as base fertilizer in combination with soil preparation. (B) flower topping phenomenon

The reason is that slow planting can not promote root control well, and topdressing irrigation is too early. The ground temperature drops, the root activity weakens, and the nutrition can't keep up, which leads to flowering and topping. In case of the above phenomenon, melons should be harvested early, some female flowers should be thinned, watered in sunny days and topdressing with nitrogen fertilizer. (3) Yellow leaves

This is caused by insufficient nutrition supply. Cucumber is a kind of plant that needs more fertilizer. Not only base fertilizer should be sufficient, but also topdressing should be strengthened at the fruiting stage to ensure high yield.