There are ways to manage Angelica dahurica in the field.

① seedlings and fixed seedlings: after the seedlings of Angelica dahurica were green in early spring, the seedlings began to grow when the height was about 5 cm, and the distance between the first and second plants was 5 cm and 10 cm, respectively. When the height was about 15 cm, the distance between plants was 12-15 cm, and the seedlings, weak seedlings and strong seedlings were removed. Spring sowing Angelica dahurica

② intertillage weeding: intertillage weeding at the same time, the first time ploughing shallow loose topsoil, and then can be deepened step by step, depending on soil moisture and weed growth. After the plants grow up and close the ridges, it is no longer suitable for ploughing and weeding. Be careful not to hurt the main root when loosening the soil, otherwise the main root is easy to bifurcate. If individual plants are found to bolting early, they should be pulled out in time.

③ topdressing: Radix angelicae dahuricae dahurica dahur Calcium magnesium phosphate potassium fertilizer can be applied before ridge closure, 25 kg of calcium magnesium phosphate fertilizer and 5 kg of potassium chloride are applied every 667 meters. Immediately after application, soil can prevent lodging and promote growth. The times of topdressing and the amount of fertilizer applied each time can be determined according to the growth of the plant, if the leaf color is not very exuberant when the ridge is about to be closed, you can topdressing again; if the leaf color is thick green at this time, the growth is exuberant, you can no longer topdressing fertilizer.

④ irrigation and drainage: Angelica dahurica likes water, but is afraid of soil water, so it can be irrigated timely with topdressing after the next spring, especially in summer days. In case of stagnant water in the field in the rainy season, ditches should be opened in time to prevent the stagnant water from rotting roots and diseases.

⑤ bolting seedlings: if a plant bolts and blossoms in May of the second year after sowing, it should be pulled out in time.

⑥ disease and insect pest control: Angelica dahurica da Leaf spot blight (white spot) can be controlled by spraying 1 ∶ 1 ∶ Bordeaux solution or 65% Dysen zinc wettable powder 400 × 500 times once or twice. For the prevention and control of purple feathers, 200 grams of 50% anti-bacterial special wettable powder plus plant ash should be used every 667 meters to sow seeds. The main pests of Angelica dahurica are yellow Phoenix butterflies, aphids, red spiders and so on. Huang Fengdie was sprayed with 800x solution of 90% trichlorfon, 500x solution of cyanobacterium (10 billion spores per gram of bacterial powder) and 2000,300x solution of Bt emulsion, once every 5 to 7 days, 3 times in a row. Spray with 40% dimethoate 1500 × 2000 times or 50% fenitrothion 1000 times during the aphid occurrence period, once every 5 ~ 7 days for 2 times in a row. The control of red spider began to spray 0.2-0.3 Baomedo stone sulfur mixture in April, once a week, several times in a row.