How to grow "imperial vegetables"? How to prevent pests?

Artemisia annua can also be called the same Artemisia, Artemisia annua, Artemisia annua, chrysanthemum cauliflower, with the functions of calming the mind and strengthening the brain, appetizers, relieving bowels, relieving cough and resolving phlegm. So, how to grow chrysanthemum? How to control diseases and insect pests? How to harvest?

I. cultivation techniques

1. Cultivation season

① spring: sow from February to April and harvest from April to July

② autumn: sowing from August to September and harvest from September to February of the following year

③ winter: sow from October to November and harvest from December to April of the following year.

2. Key points of cultivation techniques

① soil preparation and application of base fertilizer

1500 kg of rotten organic fertilizer per mu is used as base fertilizer. After drying the field for 2-3 days, a tall box with a width of 1.5m was made, and the ditch depth was 20-25cm. After raking and leveling the fine topsoil, the seeds could be sown.

② sowing

The seeds should be treated before sowing, soak the seeds in warm water for 24 hours, remove them and place them in an environment of 15-20 degrees to accelerate germination. When sowing, the amount of application per mu is 3-4kg, and after sowing, the land tax is irrigated to cover the soil after 0. 5-1cm.

II. Control of diseases and insect pests

1. Blight

① is suitable for sowing, and reasonable planting density is selected.

At the beginning of the onset of ②, use 75% chlorothalonil wettable powder at noon on a sunny day, or 58% Redomir manganese zinc wettable powder, or 64% disinfectant alum wettable powder alternately.

2. Leaf spot

① practices crop rotation.

In the early stage of ②, 70% methyl thiophanate wettable powder 1000 times solution and 75% chlorothalonil wettable powder 1000 times solution were used for prevention and treatment.

3. Sclerotinia disease

The seeds of ① should be sterilized before sowing, and the seeds can be washed with 10% salt water.

② was planted in high border to control the amount of nitrogen fertilizer applied.

At the initial stage of the onset of ③, 50% carbendazim wettable powder, or 40% sclerotia net wettable powder, or 50% prohydantoin wettable powder 1000-1500 times were used for prevention and treatment.

4. Plutella xylostella

Avoid continuous cropping when planting ①.

② performs regular cleanup work.

In the early stage of ③, BT emulsion or 3000 times of Yitaibao EC was sprayed for prevention and treatment.

5. Cabbage worm

Avoid continuous cropping when planting ①.

② was sprayed with 500,800x BT emulsion when the temperature was above 20 degrees.

6. Spodoptera litura

The adult worms were trapped and killed with sugar, wine, water and vinegar in the ratio of 3 ∶ 1 ∶ 2 ∶ 4 and a small amount of trichlorfon.

III. Harvest

1. When the chrysanthemum plant reaches 20cm, it can be harvested. The harvest can be cut off with 2 or 3 leaves at the base of the stem with a sharp knife. If it is harvested every 20-25 days, it can be harvested 2-3 times and the yield is 1000-1500 kg per mu.

2. The harvest interval is 20-25 days, and it can be harvested 2-3 times.