Brief introduction of Yushu
Jade tree flower, alias phoenix tail palm, Sedum, glass tree, Babel, Kan Qing, Holly, succulent evergreen plant, Latin scientific name: Jade? Plants, also known as Yanzhang, Sedum, glass tree, Babel, Kan Qing, Holly, fleshy evergreen, fat doll. Warm, dry and sunny environment. Not cold-resistant, afraid of strong light, slightly resistant to shade. The soil is fertile sandy loam with good drainage. The temperature is not lower than 7℃ in winter. Rosa davurica is native to southern Africa and can be used as a family ornamental plant.
Cultivation method of Yushu
Yushu flower has a tall and beautiful crown, green stems and leaves, and white flowers at the top, which is very elegant and chic. It will be more beautiful to decorate if a basin frame is equipped and the stones are processed into small bonsai.
Wild rose likes warm, dry and sunny environment. Not cold-resistant, afraid of strong light, slightly resistant to shade. The soil is fertile sandy loam with good drainage. The temperature is not lower than 7℃ in winter.
Yushu is commonly used for cutting propagation. In the growing season, cut off 8- 10 cm thick and full top branches, slightly dry them and insert them into the sand bed.
Rooting takes place about 3 weeks after insertion. You can also insert a single leaf. Then insert it into the sand bed, take root about 4 weeks after insertion, and put it into the pot when the root is 2-3 cm long. Change pots and add rich soil every spring. Swallow's paw grows fast. In order to keep the plant plump, it is not advisable to have too much fertilizer and water. Water 2-3 times a week during the growing period, and strictly control watering in hot and humid July-August. Poor ventilation or excessive water shortage in midsummer can also cause leaves to turn yellow and fall off, so they should be maintained in a semi-shady place. After autumn, watering gradually decreases. When cultivating outdoors, avoid heavy rain, or there will be too much water in the roots, which will easily lead to the death of rotten roots. When changing pots every year or putting houses in autumn, attention should be paid to shaping and pruning to make the plant shape more elegant.
The main diseases of Rosa davurica are carbon susceptibility and leaf spot, and 70% thiophanate-methyl wettable powder 1000 times can be sprayed. The indoor ventilation is poor, and the stems and leaves are vulnerable to scale insects. Use 40% omethoate emulsion 1000 times solution for spray killing.
Matters needing attention in Yushu culture
(1) The soil in Yushu Basin requires good drainage, but it can't be too easy, otherwise it will easily fall off when it grows up. 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) There are a lot of Euphorbia fischeriana in the branches and leaves of Yushu, and the skin will be red, swollen, painful and blistered when people touch the juice in the branches and leaves.
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) In the middle of June, it was moved indoors in May 438+10, and placed 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 avoids transplanting seedlings when the soil is too wet. When the temperature is high, it should be transplanted in early summer. After replanting 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; 0.5% ~ 1% bordeaux solution (or 50% carbendazim 1000 times solution) can be sprayed at the early or late stage of onset.
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; 0.3% ~ 0.5% Bordeaux solution (or 60% zineb 800 ~ 900 times solution, or 70% Tobezin 1500 times solution) can be sprayed at the initial stage of the disease.
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, the branches and stems are covered with insects, which causes the plants to turn yellow and affects their growth.
Prevention and control methods: If there are few damaged plants or insects, insects can generally be scraped off with bamboo pieces and other things.
In severe cases, it can spread to the petiole. 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; 0.3% ~ 0.5% Bordeaux solution (or 60% zineb 800 ~ 900 times solution, or 70% Tobezin 1500 times solution) can be sprayed at the initial stage of the disease.
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.
Prevention and control methods: If there are few damaged plants or insects, insects can generally be scraped off with bamboo pieces and other things.