How to raise potted mulberry flowers?

Hibiscus hibiscus, also known as red hibiscus, safflower, zhuanghong, etc., is an evergreen shrub of the genus Hibiscus of Malvaceae, originally from China. It is a popular ornamental plant in ancient times, with large and colorful flowers, often blooming in four seasons, mainly for garden use. It is planted all over the world, especially in the tropics and subtropics. Let's take a look at how potted mulberry flowers are raised.

Growth habits of Flowers of Fusang

Fusang flower is a strong positive plant, which likes to be warm and humid, and requires sufficient sunlight, no shade tolerance, cold and drought tolerance. It can only be potted in the Yangtze River basin and north of China, and the temperature can be maintained at 12: 15 ℃ in greenhouse or other protected areas. When the room temperature is lower than 5 ℃, the leaves turn yellow and fall off, and when the temperature is less than 0 ℃, they will suffer frost injury. Resistant to pruning and strong branching. It can adapt to a wide range of soil, but the slightly acidic loam rich in organic matter and pH6.5~pH7 grows best.

The Propagation method of Fusang Flower

The main results are as follows: 1. Cutting is usually carried out from May to October and in the greenhouse in winter, but the survival rate is high in the rainy season. The best cuttings are one-and-a-half Lignification, 10 cm long, cut off the lower leaves, leave the top leaves, cut flat, insert in the sand bed, maintain high air humidity, room temperature is 18-21 ℃, rooting 20-25 days after insertion. The rooting period could be shortened by treating the base of cuttings with 0.3-0.4% indolebutyric acid for 1-2 seconds. Transplant into pot when the root is 3-4 cm long.

2. Grafting: usually carried out in spring and autumn, it is mainly used for mulberry varieties with difficult cutting or slow rooting, especially for double-petal varieties with low survival rate. Branch grafting or bud grafting can be done, and the rootstock is supported by a single flower, and the grafted seedlings branch and blossom in the same year.

The Culture method of Fusang Flower

1. Lighting: the mulberry flower is a positive tree species, which should be moved to the outdoor at the beginning of May and placed in a sunny place. If the light is insufficient, the buds will fall off easily, the flowers will shrink, and the sunshine should not be less than 8 hours a day.

2. Fertilization: Fusang flower has a great demand for fertilizer in the growing season, applying dilute liquid fertilizer every 7 to 10 days.

3. Watering: Fusang peanuts should be well watered for a long time, and they should not be short of water or be waterlogged. They are usually watered once a day, once in the morning and evening in the summer. The ground is often sprinkled to moisturize and cool down to prevent young leaves from scorching and flowers from falling early.

4. Overwintering: the mulberry flowers moved into the greenhouse after the cold weather at the end of October, and the temperature was kept above 12 ℃. The management after autumn should be cautious, and less fertilizer should be paid attention to in the later stage so as to avoid setting autumn shoots. Autumn shoot tissue is young, cold resistance is weak, cold weather will suffer frost damage.

5. Pruning: Fusang flowers can be pruned before and after leaving the room in early spring, with the exception of 2-3 buds at the base, all the upper branches are cut, pruning can promote the development of new branches, the growth will be more exuberant, and the plant shape will also be beautiful. After pruning, due to the reduction of aboveground consumption, it is necessary to properly control water and fertilizer.

6. Change pots: loose and fertile sandy loam should be selected for planting Fusang flowerpots, and pots should be changed before moving out in early spring and April every year. When changing the basin, it is necessary to replace the new culture soil, cut off part of the overdense curly fibrous roots, apply sufficient base fertilizer, and slightly add phosphate fertilizer to the bottom of the basin.

Disease and pest control of mulberry flowers

1. Leaf spot

The harm often occurs when the weather turns cold at the end of autumn, especially in the north. The initial symptom is that the leaves appear light yellow and reddish yellow spots, and the disease spots are round or oval after enlargement. Under relatively humid conditions, black granules can appear on the disease spots, that is, the conidia of pathogens, and the leaves dry and fall off in the later stage.

[prevention and control] the key to prevention and control is to do a good job of cold prevention, and protective measures should be taken when the strong wind drops temperature after autumn. on this basis, timely spraying 500 × 800 times solution of Dysen zinc or 1500 times of ammonium can have a good control effect.

2. Stem rot

[harm] mostly occurs in the rainy season, and the disease is serious under the condition of high temperature and heavy rain. Most of the pathogens were infected from the root-stem junction of the plant, and the initial symptom was not very obvious, but the cortex of the damaged part shrunk slightly dark brown, but the subcutaneous tissue began to rot and turned brown. After a week of disease spot around the stem, the plant withered and died. From the foliar point of view, at the initial stage of the disease, the leaves wilted, the edge appeared yellow-brown spots, gradually expanded to the inside, and the leaves dried up and fell off in the later stage.

The key to prevention and control is to prevent long-term erosion of plants by torrential rain and to dry them with topiramate every 10 days or so before and after the rainy season. The experiment shows that this method has a good control effect.

3. Root knot nematode disease

Root knot nematode disease is also a widely distributed and serious disease. Observed from the aboveground part, the growth of the leaves was weak at the initial stage, and reddish-brown spots appeared on the edge. And expanded inward, and the leaves dried up and fell off in the later stage. From the underground part, it was found that there were tumors of large and small between the roots of the plant, smooth flesh color in the initial stage, rough brown in the later stage, and pear-shaped female nematodes in the size of needle tips.

[prevention] it is difficult to prevent and cure. If the number of plants is small, the soil must be exposed to the sun for a long time, and the old soil should not be used again. More plants can also be applied aldicarb granules, according to the 5-inch pot buried in about 0.5 grams plan.