What are the breeding methods and precautions of Yushu?

Yushu, also known as Sedum, Evergreen or Coloured Grass, is a succulent semi-shrub of Bermudagrass belonging to Sedum, which has good ornamental value and is often used as an indoor decorative bonsai. The following is to introduce the cultivation methods and precautions of Yushu for everyone.

Cultivation method of Yushu

1. Pot soil requirements: The most suitable time for changing pot soil and planting is early spring. Potted soil should be loose, fertile and well drained. Pot soil can be 2 parts humus soil or peat soil, 2 parts garden soil, 3 parts coarse sand, 1 part limestone gravel, or 3 parts humus soil, garden soil, coarse sand, 1 part mixed culture soil with bone powder and plant ash.

2. Temperature requirement: The temperature between 20-30 degrees is most favorable for the growth of Yushu. Spring and autumn are the best seasons for Yushu to grow. Yushu is afraid of strong light. When the temperature is high in summer, we should pay attention to keeping plants in the shade to avoid direct sunlight. When the temperature of Yushu's growing environment is higher than 38 degrees, the growth rate will start to slow down and even enter a short dormant period. Pay attention to the temperature in winter and put the plants in a greenhouse, preferably in a sunny place. The room temperature should not be lower than 7 degrees. Below zero, plants will freeze to death. Yushu, which is in the growing period, needs shade in addition to high temperature and heat in summer. All should be placed in sunny places.

3. Watering requirements: When Yushu is in the growth period, the watering times should be controlled at 1 time, once every two to three days. There should be no stagnant water, and the soil in the basin should be avoided from being too wet. In summer, the watering times should be controlled, and ventilation should be strengthened to avoid defoliation in Yushu. To cultivate Yushu in winter, water should be reduced. The specific principle depends on the dry and wet conditions of the soil in the basin. It is best to dry the basin soil a little.

4. Fertilization requirements: Yushu can be properly fertilized during the growth period. Generally, the liquid fertilizer of decomposed pancakes is applied 2-3 times a month. Sufficient base fertilizer should be applied before soil replacement or planting, and decomposed organic fertilizers such as chicken manure, pigeon manure, bone meal, manure and various cake fertilizers can be added to the cultivated soil as base fertilizer. In order to keep the plant plump, the fertilizer and water should not be too large to avoid excessive growth.

Matters needing attention in Yushu culture

1, the soil in Yushu basin requires good drainage, but it should not be too easy, otherwise it will easily lodging when it grows. Avoid getting caught in the rain and accumulating water outdoors in rainy season, and strictly control watering during the semi-dormancy period from July to August, otherwise the roots will rot easily. Winter should be dry and not wet, and the basin soil should be slightly wet.

2. The branches and leaves of Yushu contain a lot of Euphorbia fischeriana. When the human body comes into contact with the sap flowing from the branches and leaves, it will cause redness, swelling, pain and blistering of the skin. If you accidentally splash it in your eyes, it will lead to blindness.

3. In summer, it can be properly shaded for heatstroke prevention and cooling, and in other seasons, it should be fully illuminated. Pot soil should be dry but not wet, so pay attention to rain protection. In winter, the basin soil should be relatively dry, and pay attention to ventilation to prevent defoliation.

4.6.5 438+1mid-October, move indoors and place it in a warm and well-lit place. The minimum wintering temperature shall not be lower than 5 degrees Celsius, and watering shall be strictly controlled to keep the basin soil from drying up. Turn the pot once every half month to avoid the deviation of branches and leaves and affect the appearance. If the light is insufficient, more attention should be paid to prevent the roots from rotting and defoliating due to damp heat.

5. Yushu likes loose sandy culture soil, and it is forbidden to transplant seedlings when the soil is too wet. When the temperature is high, it should be transplanted in early summer. After transplanting seedlings, it is not advisable to water them too much and put them in a cool place.

Pest control of Yushu culture

1, elm leaf spot

Symptoms: the disease occurs on the leaves of Yushu, which is easy to happen in wet weather. At first, the lesion was a small brown spot, surrounded by water, light green, wheel-shaped, round to oval, with brown and gray edges. In the late stage, dark brown mildew spots appeared in the center of the lesion, which turned into dark brown mildew spots under wet conditions.

Prevention and treatment methods: clean the diseased leaves in time; 0 can be used in early or late stage of disease. Spray 5% ~ 1% bordeaux solution (or 50% carbendazim 1000 times solution).

2. Yushu Anthracnose

Symptoms: the disease also occurs on the leaves of Yushu, and can spread to the petiole in severe cases. At the initial stage of the lesion, it is a water-soaked macula, and after expansion, it is oval to irregular brown or yellowish brown with a slight wheel pattern. In the later stage, the lesion becomes dry and produces small black spots arranged in a wheel shape. This disease is mainly due to poor ventilation.

Prevention and control methods: strengthen maintenance and increase the application of phosphorus and potassium fertilizer; You can use 0 at the beginning of the disease. 3%~0。 Spraying 5% Bordeaux solution (or 60% zineb 800 ~ 900 times solution, or 70% Tobezin 1500 times solution).

3. Soft brown scales

Symptoms: When soft scale insects harm plants, they usually gather on leaves or tender leaves, suck the juice of plants and secrete mucus at the same time. Their excrement may lead to the proliferation of a large number of coal-polluted bacteria, blackening the stems and leaves, affecting the photosynthesis of plants, causing weak growth and yellow leaves, which is not conducive to viewing. In severe cases, branches and stems are covered with insects, which leads to yellowing of plants and affects their growth.