What should be paid attention to in the cultivation of Artemisia annua in arch shed?

What should be paid attention to in the cultivation of Artemisia annua in arch shed? Also ask the netizens who know to help introduce the four key points of planting Artemisia annua with arched shed in autumn, which are listed in detail below for netizens' reference. First, the sowing time of chrysanthemum: generally speaking, chrysanthemum can emerge within 4 days after sowing, but if the weather is sunny and the temperature exceeds 32 ℃ within 4 days after sowing, it will be more difficult for chrysanthemum to emerge. Therefore, it is necessary to understand the weather forecast before sowing, and it is best to ensure that it will encounter cloudy days or slightly lower temperatures after sowing, so as to ensure the normal emergence of Artemisia annua. Point 2, the sowing amount of Artemisia annua: if the weather is cold and cool, it will use 7 jin of seeds per mu of chrysanthemum, and with the increase of temperature, in order to prevent the phenomenon of dead seedlings, the sowing rate of chrysanthemum should be increased appropriately, and 8 jin per mu of land can be used 9 jin. Third, the watering of Artemisia annua: Artemisia annua can be harvested by watering three water after sowing. Follow the first water after sowing. The second water is usually carried out about 10 days after emergence. But the second watering time is not fixed, it depends on the market price. If the market price is good, the second water can be poured several days in advance so that it can be listed earlier; if the market is not good, it can be watered again a few days later, so that the listing can be delayed. The third water is poured the day before the harvest of chrysanthemum to improve the quality. Main points 4. Pest control of chrysanthemum: generally speaking, chrysanthemum is very easy to be infected with blight and catchment after emergence, so it should be sprayed with 450 times solution of 15% carbendazim immediately after emergence. Control methods of anthracnose of Artemisia annua L. planting methods of Artemisia annua L.