How to plant bonsai dragon boat flowers and how to prevent these diseases?

Dragon boat style elegant, beautiful leaves, rich colors, dense flowering, cutting terminal, so flowering dragon boat flowers swaying in the branches, if a gust of wind, a ball of flowers in the branches like a smiling face in general, it is not a charm, people linger, so there are a lot of people who cultivate dragon boat flowers. So how to grow dragon boat flowers?

Dragon boat flowers like the hot, humid and sunny environment, it is best to be exposed to the sun when planting, and the soil surface planted in the pot can be watered after the soil surface is obviously dry. When the weather starts to turn cool in late autumn, the dragon boat flowers can be moved indoors for planting, preferably by the window, and the temperature should be kept at least above 7 ℃.

Soil

The best cultivated soil is sandy loam or humic loam which is well drained, acidic and rich in organic matter. Before transplanting, turn the soil layer deeply, break the large soil mass, mix fully with river sand and organic fertilizer soil according to the soil structure, and reach the soil quality condition suitable for the growth of dragon boat flower; the nutrient soil of pot or bag seedling is 1 part of garden soil, 1 part of river sand and 1 part of organic fertilizer soil, or the proportion of pond mud, river sand and coconut bran is 1 / 1 / 1 / 0.5.

Light and temperature: Dragon boat flowers like light, but avoid strong light. It should be placed in the leeward and sunny place in spring and autumn, shade farming is needed in summer, and dragon boat flowers can be fully exposed to light in winter. Dragon boat flowers like a warm environment and keep it between 12 and 18 ℃ indoors in winter. The dragon boat flowers can be put outdoors during the Qingming Festival in spring and indoors when the temperature is lower than 15 ℃ in autumn.

Watering and fertilizing: Dragon boat flowers are like wet environment, but afraid of water. It is best to water every three days in spring and autumn, and every morning and evening in summer. At the same time, in order to maintain high humidity, foliar spray is often sent in summer, and dragon boat flowers are not watered on rainy days. Dragon Boat Flower likes fat meat, but avoids heavy fertilizer and raw fertilizer, which can be cooked every half a month in the growing season.

Change the basin and pruning: the dragon boat usually changes the basin every two years, preferably in early May. When changing the basin, some old roots should be cut off properly. The pruning of dragon boat flower is usually carried out after coming out in spring, mainly to properly thinning the plant to facilitate ventilation and good growth. If there are fewer branches, the main branch should be strongly cut in order to make the dragon boat flower more lateral branches.

Dragon boat flower propagation with sowing, striping, cutting can be used. Cutting can be carried out in the growing season, especially from June to July. Take 2-3 nodes of one-year-old full branches, cut them into the sand, shade and keep warm, and take root for about 50 days. Striping is carried out at the beginning of spring. The newly propagated seedlings should be kept in a semi-shady place after potting, and thin fertilizer should be applied every 10-15 days after survival. When the weather is dry, attention should be paid to spraying water to humidify. When the seedling grows to about 15 cm, it is necessary to pick the heart to promote the lateral branches and make the plant type plump.

Disease prevention and cure

Leaf spot disease

The disease is caused by Fusarium oxysporum. The pathogen overwinters on diseased flowers or in the soil with diseased leaves, and spreads by wind, rain or water the following year.

Prevention and cure method

Horticultural control: to meet the growth conditions of dragon boat flowers, warm and humid climate, as well as loose and fertile acidic soil.

Drug control, the initial stage of the disease began to spray, the agent can choose 50% methyl thiophanate sulfur suspension 800x liquid, or 50% carbendazim wettable powder 500x liquid, or 10% antimicrobial agent 401acetic acid 1000 times solution spray.

Anthrax

The disease mainly harms the leaves, the pathogen overwinters on the diseased part or the remnant of the diseased leaves, spreads by wind and rain when the conditions are suitable, invades from the wound and carries on the initial infection.

Prevention and control methods:

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 medicine before the attack, the medicament can choose the Bordeaux solution of 1 Vera 1 200 times, or 50% carbendazim wettable powder plus 75% chlorothalonil wettable powder 800 times, or 25% carbendazim wettable powder 500 times. The above-mentioned agents were sprayed every 10 days or so for 3 times in a row.

Pest control

Shell worm

Once the shell insect occurs, it does great harm, mainly by 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.

Prevention and cure method

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: root application of internal absorption granules, such as 3% carbofuran granules, etc., the dosage is 0.5 kilogram buried in a flowerpot with a diameter of 20 centimeters, added in a large pot, and the efficacy period can reach 40 to 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.

Aphids

When aphids harm young stems and leaves, spray 2.5% fish rattan essential oil 1200 times.

Dragon boat flower, also known as Yingdan, Xiandan flower, hundred red, for Rubiaceae, dragon boat flower plant. The plant is low, beautiful flowers and leaves, rich flowers and colors, such as red, orange, yellow, white, two colors and so on. Beautiful plant shape, dense flowering, rich flowers and colors, is an important potted woody flower, is the national flower of Myanmar. In the south of Guangxi Province, people used to call it Hydrangea. The dragon boat blossoms for a long time and can blossom from March to December every year.