1. Variety Selection Summer and autumn cucumbers are suitable for heat-resistant, disease-resistant, high-quality and high-yield varieties. Suitable varieties include Xiangchun No. 7, Jinyan No. 4 and Jinyan No. 7. 2. Seeding seasons and methods Summer and autumn cucumbers are generally sown in May to July. They cannot be planted too late because the temperature is low in the late growth stage and affect the yield. Seeding methods dry seed seeding and seedling transplanting two kinds. Dry seed live, before planting, open a good hole according to spacing, sow 4 to 5 seeds per hole, water or irrigation, cover rice straw, wheat straw or shade moisturizing, 4-5 seeds, watering or irrigation, cover straw, wheat straw or Shade net moisturizing, after emergence, to remove the cover, the seedlings 1 or 2 times. After transplanting seedlings, a shade shed is set up after sowing, and transplanted after emergence. The seedling age should not be too long. 3. Cultivation management The growth of cucumbers in summer and autumn is fast, the time is short, and the amount of fertilizer is large. Fertilizer should master the principle of “basic fertilizer, light weight, heavy fruit weight, small meals, and cooked rotâ€. General basal fertilization should apply about 1,500 kilograms of excrement. 50 kg of compound fertilizer and 50 kg of dried vegetables. Seedling stage with 1 to 2% of the concentration of faecal water to raise seedlings, the results of the period with 3% concentration of feces water fruit, summer and autumn cucumbers are both happy and afraid of water, irrigation depends on the day, see the land, see seedlings, flexible control, implementation Three cool (cool, cool, cool) irrigation, let horse water. 4. Diseases and Insect Pests Prevention and treatment of cucumbers in summer and autumn are generally more serious. Pest control is the key to the harvest of high-yield cucumbers in summer and autumn. 4.1 Insect pest control mainly includes three kinds of locusts, Huangshougua and Gualou. (1) The yellow squash adult worm infested the cotyledon, young leaves and flowers, and the damage location was a round coil. The cucumber was seriously damaged before the five-leaf stage. Available 2.5% trichlorfon powder or 80% trichlorfon soluble powder 1000 times; 80% dichlorvos 1000 times or 50% phoxim EC 2500% times; 50% marathon EC sprayed 1000 times. Larvae can be used to irrigate the roots with 1000 times fish essence. (2) The number of aphids is high, and the rapid propagation is concentrated on the back of the leaves, which not only causes the lack of nutrients in the plants but also spreads the virus. From the seedling stage to the harvesting stage, the damage is great. Because the breeding speed is high, the field should introduce attention when it sees locusts. Omethoate has good control effect on locusts, but it should be used four weeks before the fruit collection period. Fruit can only be used in the autumn cucumber seedling stage, available 50% anti-influx, 25% deltamethrin 3000 times solution. (3) Trichosanthes harms stem tips, melon strips and female flowers. It can be sprayed with enemy-killed or 50% phoxim 800 times solution. Once the larva is found, it will be sprayed, and it will be hard to pack with the leaves after the second age. 4.2 Diseases mainly include downy mildew, viral disease, and wilt disease. (1) When the downy mildew was found, the back surface of the leaves was immersed in water, gradually turned yellow and brown, and the lesions were massive and conjoined to death. Drugs for prevention and treatment include: Kelu, Ankang Manganese, Promecarb, Raidomiol, Precore, Infectious Cream and Metalaxyl. The above drugs also have a certain effect on the disease. (2) Viral disease is caused by the virus and the locust spreads. Growing point clustered, the leaves were curled, the fruit produced spotted spots, the surface was abnormally smooth, curved, and the fruit was not correct. Pay attention to the prevention and control of aphids. Viruses can be sprayed at the seedling stage. The drugs include the virus king, virus A, virus K, and virus spirit. (3) Fusarium wilt plant root contracture, longitudinal split, vascular bundle brown, easily lead to the death of the whole plant. The main prevention is; 2 to 3 days before sowing, acupuncture watermelon retting agent, according to each packet of 50 grams diluted 120 points after the dilution, once foot, inhibit the number of fusarium wilt, so that it does not show symptoms, can also be used for the enemy Dripping. China Agricultural Network Editor
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