Why does the camellia at home wait until now? Although there are many buds, they are all small and grow slowly. What is the reason? How to solve it?

Pots of 15 ~ 20cm are commonly used for potted camellia. Camellia root system is fragile, so be careful not to hurt the root system when transplanting. Potted camellia, after flowering in spring or in September ~ 65438+1October, change pots, cut off the dead branches or dead branches and replace them with fertile humus. Camellia likes to be wet, but the soil should not be too wet, especially potted plants. Too wet soil in the basin can easily lead to root rot. On the contrary, if the irrigation is not thorough and too dry, the leaves will curl and affect the development of flower buds. There is no need to fertilize camellia immediately after changing pots in spring. After summer, the stems and leaves will thrive. Fertilize 1 time every half month or use "Huiyou" 2 1-7-7 acid fertilizer. From germination to flowering in September, add 1 ~ 2 times phosphorus and potassium fertilizer. In late summer and early autumn, camellia began to form buds. It is advisable to leave 1 ~ 2 flower buds on each branch, not too much, so as not to consume nutrients and affect the flowering of the main flower buds. Pay attention to the position of leaf buds when picking buds to keep the plants beautiful. At the same time, dry waste buds will be removed at will. During the growing period, we should keep enough moisture, spray water on the leaves 1 time every day, and maintain high air humidity in summer, with 50% shading. Water and fertilizer should be applied once a month, and thick fertilizer should be applied before and after the germination of new buds. Fertilization should be gradually controlled after August, stopped after September to promote the formation of flower buds, and liquid fertilizer should be applied after the formation of flower buds. There are camellia anthracnose and camellia cake disease; Common pests are red spiders and scale insects. When camellia is cultivated indoors and in greenhouse, if it is poorly ventilated, it is prone to red spiders and scale insects. It can be sprayed with 40% omethoate EC 1000 times or washed with water. In rainy season, the air humidity is high, and anthrax often occurs. Spraying the same amount of Bordeaux mixture or 25% carbendazim wettable powder 1000 times can prevent and control it. Common flower diseases and insect pests in spring: the temperature is warm and cold in spring, and the air humidity is high. At present, the occurrence of crop diseases and insect pests is moderately heavy, and there are many flower diseases and insect pests. Generally, the following aphids are more serious in April-May: hibiscus, peach, hibiscus, rose, honeysuckle and so on. With the increase of temperature, aphids are increasing. Control method: water 1200- 1500 times before spraying 1, 40% omethoate or 50% thiophosphate. 2. A small amount of potted flowers can also be sprayed with 70- 100 times of neutral washing powder solution. The damage of red spider to jasmine, hibiscus, asparagus, rose and dahlia began in early April. Control method: 1, spraying 1000 times of rapid killing liquid. 2. A small amount of potted flowers are often washed with tap water on the front and back of the leaves, or sprayed or soaked in boiled and cooled 100- 150 times of batter water, and washed with clear water once a day or two, which can get obvious results. Scale insects (flower lice) Most of the scale insects on Magnolia grandiflora, Rosa chinensis, Buxus buxus and Pittosporum begin to hatch from mid-April to mid-May. Prevention and control method: 1. Before the insect hatches, gently brush off its body with your hands. 2. Spraying 40% omethoate1000-1500 times during the larval incubation period. When the temperature reaches 20℃, newly planted flowers, saplings and some flowers with rotten roots are prone to sheath blight when the soil humidity is high. Control method: 1. Before sowing, 70% quintozene1.5-4kg was mixed in the soil evenly. 2. Control watering at seedling stage and don't let the soil get too wet. 3. At the initial stage of the disease, the water 1% ferrous sulfate or 50% mancozeb solution is 200-400 times, and 2-4 kilograms of liquid medicine per square meter of water. Rose rust will attack roses when they are in bud. Control method: 1. When roses germinate, the yellow diseased buds that germinate first should be picked and burned in time to eliminate the source of infection. 2. Spraying 15% triadimefon 700- 1000 times at the initial stage of invasion. Powdery mildew of Chinese rose and Impatiens mostly occurs in May-June, and it is easy to cause symptoms such as yellow leaves, dead leaves and bent shoots in summer. Control method: 1, pay attention to the ventilation and light transmission of flowers. 2. Apply less nitrogen fertilizer and more phosphorus and potassium fertilizer. 3. Spray 1 times 15% triadimefon 700- 1000 times at the initial stage of dyeing. How to identify flower diseases and insect pests Flower diseases are generally divided into physiological diseases and parasitic diseases. Physiological diseases are mainly caused by unsuitable climate and soil conditions. Common physiological diseases are: burns caused by strong light irradiation in summer; Low temperature in winter causes freezing injury; Too much water leads to rotten roots; Lack of water will cause leaves to scorch and wither; The lack of some nutrients in the soil, the emergence of element deficiency and so on. Parasitic diseases are caused by fungi, bacteria, viruses and nematodes infecting flowers. These creatures have different forms, but most of them are parasitic and pathogenic, and have strong reproductive ability. They can spread from infected plants to healthy plants through various channels (stomata, wounds, insects, wind, rain, etc.). ), grow, develop, reproduce and spread under suitable environmental conditions, and gradually expand and spread. So this disease is the most harmful to flowers. Fungi Fungi are lower organisms, and eukaryotes have no chlorophyll. It uses mycelium as vegetative body and spores for reproduction, which is the most important kind of flower diseases. Most fungal diseases have obvious symptoms, such as mildew, powder, rust, spots, silk and so on. These characteristics are one of the main basis for distinguishing fungal diseases. Common fungal diseases include powdery mildew and anthracnose. Bacterial bacteria are single-celled prokaryotes that reproduce by division. The main characteristics of bacterial diseases are that the damaged tissues are flooded or the lesions are transparent, and bacterial mucus overflows from the affected parts under wet conditions, which is one of the main basis for distinguishing bacterial diseases. Common bacterial diseases include bacterial soft rot of iris. Viruses are tiny parasites. Its shape can only be observed by electron microscope. It is parasitic in the living cell tissue of flowers and can spread to the whole plant with the flow of host juice, causing diseases of the whole plant. Viral diseases often show symptoms such as mosaic, yellowing, deformity and ringspot. Common viral diseases include narcissus virus disease. Nematodes belong to a class of lower animals. Nematodes are slender and slightly pointed at both ends, and their body length is generally 1-2 mm, like roundworms. Female adults of a few nematodes are spherical or pear-shaped. Most of them live in the soil and parasitize the roots of flowers, which stimulates the local cell proliferation of the host and forms tumors. Common nematodes include cyclamen root-knot nematodes and so on. Key points of postpartum maintenance and treatment of camellia: Camellia has beautiful crown, green leaves, large and gorgeous flowers and long flowering period, which coincides with New Year's Day and Spring Festival. Potted plants decorate rooms, study rooms and balconies, presenting an elegant and luxurious atmosphere. Planting in the courtyard, with flower walls and rocks in front of the pavilion, the scenery is natural and pleasant. In the process of storage and transportation, it is necessary to prevent high temperature and air drying, otherwise the buds and flowers will easily fall off and affect the quality. * Key point: Camellia is an easy-to-see plant in general gardens. Because dark green leaves are also beautiful, you can also use only leaves to set off other flowers. But flowers fall off easily. You can often see flower beds or potted plants full of primroses. Don't water it too much. Be careful not to let the roots rot.

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