Camellia buds have a long incubation period and require a lot of nutrients from the buds to the flowering stage. If the accumulation of nutrients in the vegetative growth stage is insufficient, the growth will be inhibited, which will eventually result in falling flowers, falling buds, and even fallen leaves and dead branches. There are many reasons for falling camellia, such as undernutrition during growth period and hormone imbalance in plants. The conditions of light, temperature, humidity, fertilizer and water are not suitable, and the invasion of pests and diseases is an external cause. Coping with disease prevention and control is described as follows: 1. Soil pH is suitable for sandy soil with a pH value of 5 to 6.5. The soil is sour or alkaline, and viscous heavy soil, saline-alkali soil, and calcareous soil can cause poor growth of Camellia, and certain trace elements cannot be absorbed. The lack of phosphorus, iron, sulfur and other nutrients in the soil will also result in the phenomenon of lack of green and budding, and the solution should be sprayed with 0.2% ferrous sulfate solution every week. 2. Thin fat fertilizer should not be applied fertilizer, concentrated fertilizer. From early spring to flowering, nitrogen and phosphorus may be applied to the liquid fertilizer once or twice to prevent budding. However, nitrogen fertilizer should not be excessive, and it is necessary to accumulate sufficient nutrients for flowering in the fall, and flowering can be used when blooming. From September to October, thin and high-phosphorus fertilizers, such as chicken manure, are applied every month to reach the purpose of budding. Stop fertilizer in November, do not avoid fertilization in winter dormancy, even if thin fertilizer is also very easy to fall buds. 3. Watering Camellia hi moist, avoid water, roots long-term wet soil, will suffocate the root, light buds fall, while the weight is dead. To protect the bud, it is necessary to keep the basin soil moist and slightly dry. If it is too dry, it will cause the dehydration of fleshy roots to die; if it is too wet, the roots will suffocate due to suffocation. When plants do not get water supply, they will bud after the first drop. If the potted soil has already been dry, it should be watered a little, so that the pot soil is gradually moist, and then irrigated, otherwise the apical dehydration, the flood suddenly can not adapt, non-beautiful buds can not. Do not water until about 70% in winter, and warm water in sunny days. 4. Pay attention to adjust the temperature and temperature to close to 0 °C, the Camellia moved to the indoor light, at night cover the curtain insulation. It is advisable to keep 3°C to 5°C during winter, and germinate earlier than 16°C, causing deciduous buds. Below 0°C, buds will be frozen. The temperature at the early stage of flowering is not lower than 5°C to 7°C, and the temperature at flowering stage is 10°C to 15°C, and the highest is 20°C. More than 2 °C in winter, Camellia will be able to keep the buds, Camellia most avoid too much temperature, sometimes high temperature, sometimes low temperature, the buds will all fall off. 5. Ventilation Some buds are caused by poor ventilation, especially in winter, long-term indoor ventilation, poor ventilation, air pollution or room temperature of more than 20 °C, will also cause fallen buds. 6. Some people think that budding buds are more than good, in fact, too many buds, will inevitably disperse nutrients, resulting in loss of buds due to nutritional deficiencies. Before and after the flower buds have bud size of 8 months should be promptly sparse buds, a branch only retains a well-developed bud, especially in the weaker plants, must be promptly sparse buds. 7. Disease prevention and control Camellia diseases include anthrax, coal pollution, and gray spot disease, among which anthrax is the most serious. The pests are mainly scale insects. Found pests should be sprayed and prevented in time, otherwise there will be serious budding phenomenon.
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