What should I pay attention to in summer?

What should Artemisia annua L. pay attention to in summer? Please give guidance on the short growth period of Artemisia annua L., which takes only more than 20 days from sowing to harvest. However, the growing period is in a period of high temperature, and it is easy to cause diseases if the management is not paid attention to. the following is an introduction to the management of Artemisia annua L. for reference: first, sowing. Sowing can be either mechanical sowing or artificial sowing. Generally speaking, seedlings can emerge after sowing for 3 days, but if it is sunny 3 days after sowing, and the temperature is more than 35 ℃, it will make it difficult for chrysanthemum to sprout. Therefore, it is best to sow in cloudy days, or to choose the sowing time on a good weather forecast, and it is best to choose the day after sowing on a cloudy day. In addition, it should also be noted that the sowing amount should also be increased, generally sowing only 7 jin of seeds per mu in winter. After emergence, the density is very suitable. The second is to water it at the right time. Watering the first water after sowing; watering the second water about 10 days after emergence, if the market price is good, the second water can be irrigated a few days earlier, if the market is not good, it can be watered again a few days later; the third water can be watered the day before the chrysanthemum harvest to improve the quality. The third is to prevent and control diseases and insect pests. Immediately after emergence, 15% carbendazim (Tushuxiao) water agent 450 times solution should be sprayed to control chrysanthemum blight and sudden fall disease. In addition, the growing period of over-summer chrysanthemum is in high temperature and rainy weather, so it is easy to appear leaf yellow, rot and other phenomena, which are mainly caused by blight and downy mildew, which should be prevented in advance in production. 600 times of aldicarb or metalaxyl manganese and zinc can be sprayed from the seedling stage. At the same time, we should also pay attention to the control of Liriomyza huidobrensis, which can be sprayed with 4000 times of miramine wettable powder. Click to get more chrysanthemum planting techniques click to get more vegetable planting techniques