Seed price and planting method of Artemisia annua L.

Artemisia annua, also known as Artemisia annua, etc., is an annual or biennial herb of the genus Asteraceae. It can be used as a vegetable when the stems and leaves are tender, originating in the Mediterranean and other places. It has been cultivated in China for more than 900 years and is widely distributed. However, the cultivation area in the north and south is very small, and Hebei, Shandong and other places are wild. Let's take a look at the seed price and planting methods of Artemisia annua.

How much is the chrysanthemum seed per jin?

The price of chrysanthemum chrysanthemum seed is about 1520 yuan per jin, but it varies greatly due to the quality, variety, market and quantity of seeds. According to the leaves, the cultivated varieties of Artemisia annua can be divided into two types: Artemisia annua L. and Artemisia annua L.. Artemisia annua L. has soft texture, less fiber, good quality and heat resistance, but it has poor cold tolerance, slow growth and late maturity, so it is suitable for cultivation in the south. Artemisia angustifolia L. has thin mesophyll, strong aroma, fine stems and branches, fast growth and strong cold resistance, but it is not heat-resistant and mature early, so it is suitable for cultivation in northern China.

How to plant chrysanthemum seeds?

1. Land selection and preparation: Artemisia chrysanthemum is not strict on soil, but it is suitable to choose neutral or slightly acidic soil with deep soil layer, loose and moist soil, rich organic matter, convenient drainage and irrigation, good water and fertility conservation.

2. Fertilizing to make beds: before sowing, Artemisia annua was applied sufficient rotten basic fertilizer, 1500-2000 kg per mu, plus 20-25 kg diammonium phosphate, scattered evenly in the field, ploughed and raked flat to make a flat border.

3. Soaking seeds to promote germination: three to four days before sowing, the seeds can be soaked in warm water of 30 ℃ for 24 hours, then washed and dried under the condition of 25 ℃. Once a day, the seeds can be sowed after germination.

4. Sowing method: direct seeding, sowing and strip sowing can be used in the production of chrysanthemum. Generally, the seed consumption of sowing is 3-4 kg per mu, and that of strip sowing is 1.5-2 kg per mu. After sowing, a layer of 1 cm soil is covered, raked flat and watered.

Planting methods of Artemisia annua L.

1. Suitable time seedlings: Artemisia annua can emerge after sowing for about a week, and when the seedlings grow to 2 or 3 true leaves, the seedlings are directly used to pull up the seedlings with high density, and the row spacing is about 4 ~ 6 centimeters, which will affect the yield.

2. Transplanting method: Artemisia annua seedlings should be raised with a sickle when transplanting, put into a prepared basin, then transplant to the whole field, the row spacing is about 4cm, then irrigate once with water, and apply nitrogen fertilizer 20 days after transplanting.

3. Water management: Artemisia annua planting should pay attention to water management. Due to the low temperature in winter and spring, watering should be properly controlled after emergence to prevent the occurrence of quenching disease and downy mildew, and should be watered according to the seedling condition, usually once every 7-8 days.

4. Reasonable topdressing: when the chrysanthemum seedlings grow to 10 cm, the seedlings are topdressing once, and then each time after harvest, the available nitrogen fertilizer is applied twice with water during the growth period, and urea is used for about 15 kg per mu.

5. Harvest: when the chrysanthemum plant is about 20 cm high and has 12 or 13 true leaves, it should not be too late so as not to affect the quality. when harvesting, you can use a sharp knife to leave 2 or 3 leaves at the base of the stem, pick off the yellow leaves and tie them into small handfuls for sale.

Disease and insect control of Artemisia annua L.

1. Blight

[symptoms] it harmed the stem base or underground root of the seedlings, which was oval or irregular dark brown disease spot at first, wilted during the day in the early stage, recovered at night, the disease part gradually sunken and overflowed, and some gradually became dark brown, and finally dried up and died, but did not lodge.

[prevention and treatment] at the initial stage of the disease, 38% cuproloxil 800x solution, or 41% poly (pyrimidine) 600x solution, or 20% methyl ibuprofen EC 1200 times, or 72.2% Prik water agent 800x solution, was sprayed once every 7 days.

2. Black spot

[symptoms] small black-brown round spots appeared on the leaves, and then enlarged or the disease spots showed irregular large patches, the edge slightly raised, and small black spots scattered on both sides of the leaf.

[prevention and treatment] at the initial stage of the disease, 4% pyrimidine nucleoside antibiotics were sprayed with 20 ml + 41% polypyrimidine 20 ml, mixed with 15 kg of water, once every 5 days and 3 times in a row.

3. Sclerotinia disease

[symptoms] the base of the stem is infected with a primary water stain, and then expands into light brown, resulting in soft rot or longitudinal cracking of the stem base. Leaves infected with disease, gray to grayish brown wet rot on the leaf surface, when the humidity is high, flocculent white mold appears on the spot, resulting in leaf rot.

[prevention and treatment] in the early stage of the disease, 20% silazomide 30 ml + carbendazim 25 ml, mixed with 15 kg of water, once every 5 to 7 days, 2 times for 3 times.

4. Vegetable borer

[symptoms] the first instar larvae eat the seedlings and heart leaves, which will affect the growth of vegetable seedlings, and the serious ones can cause the seedlings to die and cause missing seedlings to break ridges. In addition to eating heart leaves, the advanced instar larvae can also eat stem pith and roots and spread bacterial soft rot.

[control] during the peak incubation period of the larvae or when the heart leaves were killed and the screen was first seen, 5% Yitaibao EC was sprayed 2 times and 3 times, and pay attention to spraying the medicine on the heart of Chinese cabbage.

5. Aphids

[symptoms] often clustered in leaves, tender stems, flower buds, terminal buds and other parts, pricking and sucking juice, making leaves wrinkled, curled, deformed, seriously causing branches and leaves to wither or even the whole plant to die.

[control] spray control with 50 ml of 25% aphid acaroid EC per mu, or 1500-2000 times liquid of imidacloprid series products, or 20% imidacloprid 2500 times solution, or 25% aldicarb 3000 times solution.