Intercropping management of Angelica dahurica

Angelica dahurica Angelica dahurica is suitable to grow in sandy loam and loam with flat terrain, deep, loose, fertile and well-drained soil.

1. Sowing: Angelica dahurica was sown in spring before and after the Qingming Festival, and sown in autumn between the End of Heat and White Dew. A shallow trench was opened according to the row spacing of 30cm-35cm with a depth of 1.5cm-2cm. The seeds were evenly scattered in the ditch, covered with soil and suppressed.

2. Field management

The main results are as follows: (1) fixed seedlings: when the seedling height is about 5 cm, the seedling starts according to the plant distance of 6 cm and 9 cm, and when the seedling height is 15 cm, the seedling is fixed according to the plant distance of 12 cm.

(2) Intermediate ploughing and weeding: combined with interseedling, the topsoil was loosened for the first time, and then deepened step by step to keep the field soil loose and free of weeds. It is no longer suitable for ploughing and weeding after the plants grow up and close ridges.

(3) topdressing: Radix angelicae dahuricae dahurica da

(4) watering: watering and drainage, Angelica dahurica likes water, but afraid of soil water, autumn sowing Angelica dahurica dahur

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

3. Pest control

Angelica dahurica Spot blight usually occurs in May, and the development of the disease can be controlled by spraying it twice with a 100-fold Bordeaux night or with a 500-fold solution of 65% zinc wettable powder 400 Mel twice. Purple feather control with 70% pentachloronitrobenzene powder 2 kg per mu plus 20 kg of plant ash was sprinkled in the soil and sown. Rotation is one of the main measures for the control of root-knot nematode disease. 1.8% avermectin EC and 48% chlorpyrifos EC can be mixed at 1:1, with 120ml per mu, watered and sprayed. The main pests of Angelica dahurica are aphids, red spiders and yellow wind dishes. When aphids occur, spray with 40% dimethoate 1500 Mel 2000 times or 50% fenathion 1000 times, once every 7 days, for 2 times in a row. In April, red spiders were sprayed with 0.2 ml 0.3 Baumedushi sulfur mixture once a week for several consecutive times. The yellow wind butterfly was sprayed with 800 times of 90% trichlorfon and 500 times of cyanobacteria, once every 5 times for 7 days, 3 times in a row.