Planting methods of green chrysanthemum

Asterina, also known as Jiangxila, July chrysanthemum, Gesang flower, etc., is an annual or biennial herb of Asterina genus of Compositae. It is produced in Jilin, Liaoning, Hebei, Shanxi, Shandong, Yunnan, Sichuan and other places. It grows on hillsides, grass, water or sparse forest shade. It is usually cited as ornamental planting in botanical gardens, gardens, courtyards and other public places. Let's take a look at the planting methods of Asterina together!

Growth Habits of Kingfisher

Asterina is a shallow root plant, pay attention to water supply in dry season. The plant is robust, does not choose the soil, but has the fertility, grows well in the fertile sandy soil. Sun-loving, wet, waterlogging intolerant, high temperature and humidity susceptible to pests and diseases. Heat resistance, cold resistance are poor. The adaptability of tall varieties is strong and can be planted everywhere. The adaptability of medium and short varieties is poor and needs careful management. Avoid continuous cropping, planting once every 3 - 4 years. New soil should be replaced once a year for potted plants.

Breeding method of Chinese chrysanthemum

1. Aster is propagated by seeds, and it is easy to emerge from drilling. Germination takes 4 days at 14~16℃ and emergence takes about 10 days. Generally, spring sowing, summer sowing and autumn sowing can be used. Flowers can be bloomed 2 to 3 months after sowing. Florescence can be controlled by sowing in batches according to needs.

2. The dwarf species of Asterina chinensis can flower from May to June when sown in greenhouse in February to March or in sunny bed in March, flower from July to August when sown in open field in April to May, flower in November when sown in early July, sow in early and middle August, and overwinter seedlings in cold bed.

3. The medium-sized varieties of Asterina chinensis were sown in May ~ June, flowered in August ~ September, sown in August and overwintered in cold bed, and flowered in May ~ June of the next year. High-type varieties can be sown in spring and summer and bloom in autumn.

The cultivation method of chrysanthemum

1. Transplanting 2~3 times during the seedling period can make the stem thick, the tree shape plump, the fibrous roots dense, drought resistance, waterlogging resistance and lodging resistance. Spring seedlings grow up to 5~ 10 cm, can be transplanted about one month after sowing, and planted about two months after sowing. During seedling period, irrigate 2~3 times and loosen soil once. After planting, irrigate 2~3 times, then loosen the soil and loosen the soil after rain. After planting and before flowering, topdressing and irrigation are generally carried out.

2. The planting of aster should pay attention to intertillage and soil moisture preservation, so as to avoid excessive watering or excessive rainfall and excessive soil moisture, excessive plant growth, lodging or disease. When the branch end is budding, it should be watered less to inhibit the elongation of the main branch and promote the growth of the lateral branch. When the lateral branch grows to 2~3 cm, slightly increase the water to make the plant type plump. Phosphorus and potassium fertilizer are the main topdressing. Do not plant continuously, and do not sow or plant seedlings in plots planted with other Compositae plants to ensure their healthy growth.

Control of insect pests and diseases in aster

1. Yellowing disease: The best control method is to plant the plants in the net room, and also spray 50% marathon 1000 times liquid or diazinon to control leafhoppers. At the same time, it is necessary to regularly remove wild weeds around atricaria to reduce the source of infection, and spray medical tetracycline or oxytetracycline 4000 times solution in the early stage of the disease.

2. Gray mold: Gray mold is a fungal disease of Botrytis. Sclerotinia overwinters on the diseased body or soil. When the temperature is about 20℃ and the humidity is very high, this disease is easy to occur. Plastic greenhouses are more serious than glass greenhouses. Pay attention to greenhouse ventilation, reduce humidity and avoid improper watering. Remove diseased plants and leaves in time, reduce infection sources, spray 50% Proxypyrene WP 1500 times solution or 50% Prohydantoin 1500 times solution during disease onset.

3. blight: At the early stage of disease and before disease onset, root irrigation or spraying with 50% carbendazim WP 500 times, 0.25 kg per plant, 5~7 days for 2~3 consecutive times, or 400 times solution of 40% carbendazim colloidal suspension, or 400 times solution of 50% thiophane methyl WP, or 200~300 times solution of 10% double-effect Ling aqueous solution, or 25.9% Kangkuning 500 solution, or 800~1500 times solution of potassium permanganate.

3. Rust: When there is a host pine plant near the chrysanthemum, it is easy to cause the occurrence and epidemic of the disease. Chlorotic spots appear on the front of the leaves, and circular pale yellow powdery spores can be seen on the corresponding back. At the initial stage of the disease, 15% triadimefon (triadimefon) wettable powder 1500 times or 12.5% speed poly 3000 times.

4. Brown spot disease: plant in a well-drained area with appropriate planting density, select disease-resistant varieties, remove diseased leaves immediately, collect diseased leaves and dead bodies at the end of autumn, spray 50% carbendazim WP 1000 times solution, or 80% zineb WP 500~700 times solution, or 1% bordeaux solution, or 755 chlorothalonil 500 times solution for control, spray once every 7~10 days.