1, land selection and land preparation
Stemona is suitable for planting in sandy loam with deep soil layer, loose and fertile soil, rich humus and good drainage. After selecting the planting site, an appropriate amount of farmyard manure, calcium superphosphate and plant ash should be applied per mu. Mix them evenly and then spread them on the ground. /kloc-after 0/5-20 days of infiltration, turn over the soil to a depth of 30 cm, level it with a shaping rake, ridging it, and dig a drainage ditch along the border to prepare for sowing.
Step 2 sow seeds
Sowing can be done in spring or autumn. Sowing is usually done in March or April in the north. Seedbed seedling raising method is adopted. After sowing, the seedbed is ditched and drilled, and covered with soil for 3-4 cm. After sowing, water it once, cover it with straw to keep warm and moist, then water it frequently to keep the soil moist. When the seedlings grow to 8- 12 cm, they can be planted. In the south, sowing is usually carried out in August and September. After soil preparation, furrow is opened at the border for direct seeding, with 4-5 kg of seeds per mu. After sowing, the soil also covers 4-5 cm. After the seedlings emerge in the spring of the following year, they will be planted in the autumn.
3. Tian Tuan management
After the seedlings are unearthed, intertillage and weed for 2-3 times. After each intertillage weeding, topdressing should be done in time to promote seedling growth. When the seedlings grow to 150 cm, bamboo poles or branches should be inserted next to the planting for winding the stems and vines. In order to make them strong, 3-4 can be tied together, which is more convenient for management. After the ground plants wither in winter, it is necessary to cultivate the soil once, or apply water-soluble fertilizer to help them survive the winter.
4, pest control
The main disease of Stemona is leaf spot, which is a bacterial disease and mainly harms leaves. At the onset, yellow-brown spots appeared on the leaves, which led to abnormal photosynthesis. Generally, it starts in May, and it is more serious in June-August. The diseased leaves should be removed first to prevent the disease from spreading to stems and vines, and podol solution should be sprayed. Pests include snails and red spiders. Spraying lime powder or lime water on the side of plants can control snails, and spraying sulfur mixture can control red spiders.