Introduction and control of chrysanthemum chrysanthemum quenching disease

Artemisia annua is the stem and leaf of the plant of Compositae. Also known as Artemisia, Chrysanthemum cauliflower, Artemisia, with Artemisia, Italian vegetables (goose vegetables), moxa, chrysanthemum is an annual or biennial herb. The roots, stems, leaves and flowers of Artemisia annua can be used as medicinal materials, which can clear blood, nourish the heart, reduce blood pressure, moisturize the lungs and clear phlegm. Artemisia annua has a special fragrance, seedlings or tender stems and leaves for stir-frying, cold salad, soup to eat. In Europe, chrysanthemum is used as flowers in flower beds.

Artemisia annua L. is a shallow root vegetable with roots distributed in the green layer of the soil. The stem is round, green, with artemisia flavor. Leaves long, margin undulate or parted, mesophyll thick. Heads, flowers yellow, achene, brown. The seeds used in cultivation, called achenes in botany, are angular and have an average weight of 1.85g. Artemisia annua likes cold and cool, can not bear high temperature, the suitable growth temperature is about 20 ℃, the growth is slow below 12 ℃, and the growth is poor above 29 ℃. Chrysanthemum chrysanthemum is not strict with light, so it is better to use weaker light. It belongs to long sunshine vegetable, under the condition of long sunshine, vegetative growth can not be fully developed, and it will soon enter reproductive growth and blossom and bear seeds. Therefore, the cultivation should be arranged in the spring and autumn season with short sunshine. The requirement of fertilizer and water condition is not strict, but it is better not to accumulate water. According to the leaf size, the varieties of Artemisia annua can be divided into two types: Artemisia annua L. and Artemisia annua L.

Chrysanthemum is a green vegetable we often see, and most of us love to eat it. Of course, because chrysanthemum has its own unique taste, many people can't eat it, so what are the dietotherapy effects of chrysanthemum? Let's take a look at it today.

Because chrysanthemum contains a variety of amino acids, chrysanthemum has the functions of moistening the lungs and tonifying the liver, stabilizing mood and preventing memory loss, and chrysanthemum chrysanthemum also contains crude fiber to help intestinal peristalsis, which can promote our defecation, so as to achieve the purpose of relieving bowels. Chrysanthemum is rich in vitamins, carotene and so on. Chrysanthemum has a fragrant smell and can relieve phlegm and cough. Artemisia annua contains protein and high amounts of sodium, potassium and other mineral salts, which can regulate water metabolism and eliminate edema. Artemisia annua also contains a volatile essential oil, as well as choline and other substances, which can lower blood pressure and replenish the brain.

Introduction and control of chrysanthemum chrysanthemum quenching disease

What is chrysanthemum chrysanthemum sudden disease?

Chrysanthemum chrysanthemum quenching disease mainly harms the tender stems of seedlings. The disease occurred immediately after the cotyledons unfolded, and the base of the stem of the seedlings was in the shape of light brown water stains, followed by basal rot, the seedlings had not yet withered and quenched, and soon the whole plant withered and died. At first, only the disease center was seen on the seedling bed, and it expanded rapidly under the condition of low temperature and high humidity, and there were pieces of dead seedlings. Chrysanthemum chrysanthemum catchment disease belongs to fungal pathogen.

Harmful symptoms of chrysanthemum catchment disease:

It mainly harms the tender stems of seedlings. The disease occurred immediately after the cotyledons unfolded, and the base of the stem of the seedlings was in the shape of light brown water stains, followed by basal rot, the seedlings had not yet withered and quenched, and soon the whole plant withered and died. At first, only the disease center was seen on the seedling bed, and it expanded rapidly under the condition of low temperature and high humidity, and there were pieces of dead seedlings.

The transmission route and incidence conditions of chrysanthemum chrysanthemum quenching disease:

It overwinters in the soil with mycelium or sclerotia, and can saprophyte in the soil for 2-3 years. The hyphae can directly invade the host and spread through water flow and farm tools. The development temperature of the pathogen was 24 ℃, the highest was 40 ~ 42 ℃, the lowest was 13 ~ 15 ℃, and the suitable pH3~9.5. The disease can be easily induced by over-dense sowing, untimely seedlings and high temperature.

Prevention and treatment of chrysanthemum chrysanthemum quenching disease:

1) spraying phytonin 7500-9000 times or 0.1%-0.2% potassium dihydrogen phosphate at seedling stage can enhance disease resistance.

2) mix seeds with 40% of 0.2% seed weight.

3) treatment of medicine and soil in seedling bed or seedling tray. You can use 40% seed mixing double powder alone, or you can use 40% seed mixture mixed with Fumishuang at 1:1, 8 grams per square meter of seedbed. The treatment method of medicine and soil is the same as sudden collapse disease. In the single incidence area of blight disease, the control effect of mixed seed Ling alone is not high, it must be mixed with the same amount of Fu and the United States can be effective. The chlorination bitter film method can also be used, that is, after the whole bed, 2-4 mm of chloropicrin is deeply applied to 10-15 cm every 30 cm, and the soil is covered while applying. After all application, the border is covered with plastic film, and then sown and planted after 12-15 days.

4) the initial stage of the disease was sprayed with 1200 times of 20% methyl rifampicin EC (lique bacteria), or 5% Jinggangmycin water agent 1500 times, 10% rikuling water suspension, 15% carbendazim water solution, 23.5 liters per square meter. When quenching disease and blight mixed, 72.2% Pulicol water agent 800 times liquid plus 50% thiram wettable powder 800 times liquid can be sprayed, 2-3 liters per square meter. Plant growth regulator-transplanting Ling mixture can also be tried. According to the disease, once every 7 to 10 days, prevention and treatment for 2 or 3 times in succession.

5) Biological control. Antagonistic microorganisms were used for biological control. Wu's pig manure composting culture antagonistic bacteria Bacillus cereas for soil, seed and reproductive weaving treatment can control bacterial blight.

6) the fruit close to the ground is prone to Rhizoctonia fruit rot, so it is best to use grass rope to make a circle to cushion the melon, or you can spray the above fungicides for prevention and control. In addition, you can also choose 15% Xiaoling (instead of copper preparation) water agent 600 times liquid, 45% soil bacteria water repellent 450 times liquid, 80% Xinwansheng wettable powder 600 times liquid.

7) seed coating was used. Using seed coating agent 9Mel 2, the seed coating technology takes the seed as the carrier, and the highly efficient internal absorption fungicide, insecticide, trace elements and hormones are coated on the seed surface with the help of film-forming agent to quickly solidify into a drug film that is not easy to fall off. after seed sowing, the effective components on water absorption germination, emergence, growth, seed coating agent are gradually absorbed by the root and transmitted to all parts of the plant, which can control germs, pests and mice on the ground and below. Cucumber seed coating agent 9mai 2 is effective on vegetables and melons. The amount used is 0.5% of the seed weight (effective component), which translates into a commodity quantity of (0.5 × 100) / 20 × 2.5g ≈ 2.5g (ml), which means that 2.5ml can be mixed with 100g seeds. The effective concentration of the commodity is 20%.