Planting techniques of Aster

Aster, also known as Qingyuan, Ziqian, braid, etc., is a perennial herb of the Compositae family. It usually grows in damp riverside areas. It is resistant to waterlogging, drought and cold. It is used in medicine to treat wind, cold, cough, asthma, deficiency, labor, cough and vomiting purulent blood. It has a certain planting value. Let's take a look at the planting technology of Aster.

Land selection and preparation

Select the land with flat terrain, deep soil layer, loose and fertile soil and good drainage as the planting plot, turn the soil more than 30 cm deep before planting, combine with ploughing, apply 3000 kg of rotten barnyard manure and 50 kg of calcium superphosphate per mu, turn it into the soil as base fertilizer, shallow ploughing 20cm before sowing, and make a high border 1.3m wide after leveling, the border ditch is 40 cm wide, and the drainage ditch is opened all around.

Planting and protecting seedlings

After the soil thawed 10 cm in spring, the stout, purple-red, dense and short rhizomes with dormant buds were selected for planting. The middle part of the rhizome was cut into small segments of 5-7 cm, each with 2-3 dormant buds. When planting on the finished border surface, the horizontal ditch was opened according to the row spacing of 25 cm and 30 cm, the ditch depth was 5 cm and 7 cm, the root bud eye was up, and the furrow was arranged in 1-2 sections according to the specification of plant spacing of 15 cm and 17 cm. The soil cover was flush with the border surface, compacted slightly after planting, watered once, and then covered with a layer of grass for heat preservation and moisturizing. After the seedlings are uncovered, the cover grass is removed to preserve soil moisture and seedlings.

Field management

Aster seedlings after shallow loosening, weeding, combined with loose soil application of mature human and animal manure 1000kg to 1500kg per mu, when the seedling height is 79cm, combined with intertillage to apply 1500 kg of mature human and animal manure per mu, before closing, combined with mid-ploughing and weeding, 300kg of rotten compost and 50kg of rotten cake fertilizer per mu, ditching beside the plant and covering the soil. If weeds are pulled out by hand after the line is closed. Timely dredging ditches and drainage after rain or irrigation, irrigation in case of drought. Cut off bolting in time when found.

Pest control

1. Root rot

[harm] harms the base of the stem and the head of the plant. In the early stage of the disease, the roots and rhizomes turned brown and rotted, and brown fusiform disease spots appeared at the base of the petiole, and the leaves gradually withered and the rhizomes rotted.

[prevention and treatment] at the initial stage of the disease, 50% carbendazim wettable powder was sprayed with 1000 times of carbendazim wettable powder or 50% carbendazim methyl wettable powder.

2. Black spot

[harm] the leaves appeared purple-black spots at the initial stage of the disease, and then expanded into near-round dark brown spots.

[prevention and treatment] at the initial stage of the disease, 65% of Dysen zinc wettable powder or 50% methyl thiophanate wettable powder 1000 times were sprayed, once every 7 days, for 3 times in a row.

3. Spodoptera litura

[harm] the larvae bite on the leaves, resulting in voids or imperfections.

[prevention and control] spray with 1000 times of trichlorfon crystal.