1. Choose good seedlings: Choose medium soil fertility, convenient irrigation and drainage, plant cruciferous vegetables in recent years, and keep away from green vegetables, radishes and other viral virus source plant plots as breeding grounds to reduce the chance of aphid transmission. After cultivating the seed, the basal fertilizer is applied. Generally, 10-15 urine of human urine per acre is applied, and 30-40 kg of compound fertilizer is applied. Seeding after leveling the seedbed, the width is generally 1.1-1.2 meters for management. Dry soil seedbeds should be sowed before sowing. 2, timely sowing: mustard seedling emergence temperature is about 20 °C, sowing too early, seedlings grow fast and susceptible to aphid damage, late fleshy stems easily hollow, sowing too late, seedlings of poor quality, difficult to obtain high yield. My county is generally planted in mid-October. Appropriate late planting can avoid the high-temperature drought in the autumn and the peak period of aphid transmission. The seedling age is 30-35 days. 75 grams of seed can be planted on a 67 seedbed and 2-3 acres of field can be planted. In order to prevent mustard virus disease, pest control can be used to cover seedlings, mustard varieties selected Zhejiang Tonghao, more resistant to virus disease. 3. Strengthen management: After 3-4 days of sowing, the soil in Miaoqing will maintain a moist state. In drought, water will be poured in the morning and at night to increase the emergence rate. When the first true leaf of the seedling appeared, the first time the seedlings were planted, and the seedlings with large leaves and high plants were removed; when the second leaf was true, the second seedlings were inoculated and the weak seedlings, diseased seedlings and hybrid seedlings were removed. Dingling plant spacing is about 5 cm. Miao Fei should "eat more meals," first light after the thick, the general application of thin human urine 2-3 times. Before transplanting, apply good fertilizer, Mushi Sanyuan compound fertilizer 10-15 kilograms. In order to prevent virus disease, Qi Mu, with a net 1500 times again to control locusts 2-3 times, so that there is no worm on the seedlings. And when transplanting mustard seedlings to do with medicine on the field.
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