1. Miao Miao: Live seedlings are released in the middle and late April. After emergence, the seedlings are 5~6 cm in length, and combined with loose soil to weak seedlings and dense seedlings.
2, cultivating weeding and topdressing: weeding and weeding 3 times a year, topdressing 4 times. Topdressing combined with cultivating and weeding. After the first cultivating and weeding and topdressing in Qimiao, 2000 kg of animal manure per acre was applied to promote seedling growth. In mid-June, the second cultivating and weeding and topdressing were carried out, and 2000 kg of animal manure water and 30 kg of superphosphate were applied per mu. In August, another cultivating and weeding and topdressing were carried out, and 2,500 kg of manure water per acre was applied, and 30 kg of superphosphate was applied. After entering the winter, combined with clearing the soil, 2000 kg of wood ash or soil fertilizer and 50 kg of superphosphate.
3, remove the flower buds: platycodon long flower period, generally in the bud period, remove the flower buds in time, the sooner the better, the results after picking the fruit, the effect is poor.
4. Irrigation and drainage: In case of drought, it can be properly watered. During the high-temperature and high-humidity rainy season, the ditch is drained in time to prevent rotten roots.
Fourth, pest control.
1, bellflower round disease: harm the leaves. It occurs in June and is the most serious from July to August. Control methods: 1 remove dead branches, diseased leaves, burned intensively; 2 pay attention to drainage after rain, reduce the humidity in the field; 3 early stage of the disease with 1:1: 100 Bordeaux solution or 65% Dyson zinc 600 times solution.
2, spot blight: damage to the leaves, the affected leaves have lesions on both sides, in severe cases, the leaves die. The prevention and treatment method is the same as the round disease.
3, purple feather disease: damage to the roots, generally began to occur in July, the roots of the disease gradually rot, only the empty shell, and finally died. Control methods: 1 implement rotation and disinfection, control disinfection; 2 more base fertilizer, enhance disease resistance; 3 apply lime powder per acre 100 kg, reduce the harm; 4 pay attention to drainage; 5 find the diseased plants in time to remove, and use 50% bacteria Sprinkle 2 to 3 times with 1000 times of WP or 50% of thiophanate-methyl 1000 times.
4, the ground tiger: harm the seedlings. Control method: use bait to trap.
5. Harvesting and processing. It is generally harvested for 2 years, and it can be harvested after growing for 1 year after transplanting. Cut the stems and leaves when the ground is yellow in the middle and late October, and dig out the whole roots. Do not hurt the roots when digging. Wash the roots of the soil and use a bowl or bamboo knife to scrape off the skin. If the fresh platycodon is placed for too long, it is difficult to scrape the skin. The stalked platycodon is easy to dry, can be dried or dried and stored in a dry and ventilated place.
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