Culture methods and matters needing attention of dragon boat flower

Dragon boat flower is an important potted wood, also known as Yingdan, Xiandan flower, hundred day red, etc., for Rubiaceae dragon boat flower is a shrub plant, people in southern Guangxi Province in China are accustomed to called Hydrangea, suitable for courtyard, hotel, scenic area layout, high and low, beautiful flowers, excellent landscape effect, widely used for potted ornamental, let's take a look at the dragon boat flower breeding methods and matters needing attention!

The growth habit of Dragon Boat Flower

Dragon boat flower is more suitable for high temperature and sufficient sunshine environment, like humid and hot climate, can not bear low temperature. The suitable temperature for growth is 2332 ℃. When the temperature is lower than 20 ℃, its growth weakens and its flowering decreases obviously, but if the sunshine is sufficient, there are still a certain number of buds. When the temperature is lower than 10 ℃, its physiological activity decreases and grows slowly. When the temperature is lower than 0 ℃, it will produce freezing injury. Acid-loving soil, the most suitable soil pH value is 5-5.5. The soil with good drainage and good fertilizer conservation can grow well, and the best cultivated soil is sandy loam or humus loam rich in organic matter. If the soil is slightly alkaline, the growth is blocked and the development is underdeveloped.

The breeding method of Dragon Boat Flower

1. Cuttage: the cuttage propagation of dragon boat flower should be carried out from June to July, and the semi-mature branches with a length of 10 cm and 15 cm were selected and inserted into the sand bed at the optimum temperature of 24 ℃ and 30 cm. The cuttings took root after 40 to 50 days, and the cuttings were soaked in 0.5% indolebutyric acid solution for 3 seconds, which could shorten the rooting period.

2. Sowing: the dragon boat flower was collected in winter and sowed in spring. The optimum temperature for germination was 22-24 ℃. It germinated 20-25 days after sowing, and the seedlings could be transferred to 8 cm pot when 3-4 pairs of true leaves were produced.

3. Striping: the plants with many branches and dense branches are selected for propagation. The plants are peeled 20 cm away from the top and wrapped with peat and film, which can heal and take root for more than 2 months.

The Culture method of Dragon Boat Flower

1. Soil: the fertile, loose and well-drained acid sandy loam is the best soil for dragon boat flower culture. For pot cultivation, the pH of mixed soil of culture soil, peat soil and coarse sand is 5-5.5.

2. Watering: Dragon boat flowers like to be wet and afraid of dry. Sufficient water is needed during the growing period of stems and leaves to keep the basin soil moist, which is beneficial to shoot germination and leaf growth. However, if it is too wet for a long time, it is easy to cause part of the root system to rot and affect the growth and flowering. If the soil is too dry or wet when dry, and the water supply is not timely, the phenomenon of fallen leaves will occur.

3. Sunshine: Dragon boat flowers need plenty of sunshine, especially during the growing period of stems and leaves, the leaves are green and shiny, which is conducive to the formation of inflorescences, neat flowering and bright colors. It can also grow in semi-overcast environment, but the leaves are light green, lack of luster, few flowers and light color. However, proper shading in strong light in summer can prolong the flowering period.

4. Temperature: the optimum temperature for the growth of Lonicera is 15: 25 ℃, 24: 30 ℃ from March to September, and 13: 18 ℃ from September to March of the following year. The winter temperature is not lower than 0 ℃, and it is easy to suffer frost damage if it is too low. On the contrary, the dragon boat flower is resistant to high temperature and grows as usual above 32 ℃. Generally speaking, the dragon boat flower has a strong adaptability to temperature.

5. Fertilization: long-term application of nitrogen, phosphorus, potassium, ferrous sulfate and horseshoe slices with nitrogen, phosphorus, potassium, ferrous sulfate and horseshoe slices, mixed with water and liquid fertilizer after ripening and fermentation.

6. Pruning: the pruning of dragon boat flowers is mostly carried out after coming out of the room in spring, mainly for proper thinning of the plants to facilitate ventilation and light. In addition, if the heart is picked properly during flowering, it can be pregnant with buds and bloom.

The Culture value of Dragon Boat Flower

1. Ornamental value: Dragon boat flower is an important potted woody flower with beautiful plant shape, dense flowering, rich flower color, peculiar flower shape, flowers to enjoy all the year round, and is widely used in potted plants and scenic spots.

2. Medicinal value: the roots, stems and leaves of Dragon Boat Flower can be used as medicine to regulate menstruation, reduce blood pressure, clear liver and relieve pain. it is widely used in the treatment of hypertension, irregular menstruation, and other diseases. it can also treat pulmonary tuberculosis hemoptysis, stomachache, rheumatic joint pain and injury.

Matters needing attention in Dragon Boat Flower Culture

1. The dragon boat flower should be properly pruned after coming out of the room in spring, so as to facilitate ventilation and light, and pick the heart properly during the flowering period, which can make it more pregnant buds and bloom. Do not water on cloudy and rainy days in summer. In case of rain, the water in the basin should be poured out in time to prevent water from rotting roots.

2. Dragon boat flowers move into the sunny place indoors in winter, the temperature should not be lower than 0 ℃, and water about once a week to make the soil slightly wet. When the summer is hot and the sun is strong, shade should be provided to cover 40-50% of the light.

3. Aphids and shell insects are often damaged during the blooming period of dragon boat flowers due to poor ventilation and other reasons, so attention should be paid to prevention and control as soon as possible.

4. Dragon boat flower can withstand short-term low temperature of about 0 ℃, but it is not resistant to frost, so it should be moved to the balcony with light before frosting. If the autumn and winter temperature is kept above 15 ℃, the culture should be moved to the place with light in the balcony when the outdoor temperature drops to 15 ℃, which can prolong the flowering time.

5. As long as the humidity is appropriate and certain light and water and fertilizer management are ensured, the dragon boat flower can blossom all the year round, so if the winter temperature is kept above 15 ℃, the dragon boat flower can still grow slowly. Management can be seen in spring, but no fertilization.

Control of diseases and insect pests of dragon boat flower

1. Leaf spot

[hazard characteristics] Leaf spot is caused by Fusarium oxysporum. The pathogen overwinters on diseased flowers or falls in the soil with diseased leaves, and spreads by wind, rain or water the following year.

[horticultural control] meet the growth conditions of dragon boat flowers, warm and humid climate, as well as loose and fertile acidic soil.

[chemical control] spraying begins at the initial stage of the disease, and the agent can be sprayed with 1000 times of 50% methyl thiophanate sulfur suspension, 50% carbendazim wettable powder or 1000 times acetic acid.

2. Anthrax

[hazard characteristics] anthracnose mainly harms leaves, and the pathogen overwinters on the diseased part or remnant of diseased leaves, spreads through wind and rain when conditions are suitable, invades from the wound and carries out primary infection.

[horticultural control] remove diseased leaves and reduce the source of infection. Proper spacing between flowerpots or plants to ensure good ventilation and light transmission.

[medicament prevention and cure] spray before the attack, the medicament can be selected as follows: 1, 1, 1, 15, 200, Bordeaux, or 50% carbendazim wettable powder plus 75% chlorothalonil wettable powder 800, or 25% carbendazim wettable powder 500 times. The above-mentioned agents were sprayed every 10 days or so for 3 times in a row.

3. Scale insects

[hazard characteristics] once the scale insect occurs, the harm is very great, which is mainly based on prevention. Once the shell insect is found, it should be controlled in time without delay. The shell insect can not only hinder the growth of the plant, cause other diseases, but also affect its ornamental value.

[horticultural control] it is forbidden to bring in or out of infected seedlings, and timely increase the application of organic fertilizer and compound fertilizer to enhance seedling potential and improve insect resistance.

[drug prevention and treatment] the root is treated with internal absorption granules, such as 3% carbofuran granules, the dosage is 0.5 kilogram buried in a flowerpot with a diameter of 20 centimeters, and the drug effect period can reach 40 days and 60 days. When spraying in time during the peak egg incubation period, 40% omethoate EC 1500 times and 50% aphid pine EC 1000-1500 times can be used.