Su Tiexi likes warm and humid climate, sunshine and shade. Growth is relatively slow, with only 65,438+0 leaves per year. When the new leaves expand and mature, cut off the lower old leaves and keep 2 ~ 3 leaves, so it is not necessary to prune them frequently. Even transplanting or changing pots does not require too much pruning. When the leaves are damaged by pests and diseases, the natural environment is harsh and yellow, they should be cut off in time. Different balcony orientations and light intensities have different effects on the growth of Cycas. The balcony facing south is most suitable for placing potted plants, and the balcony facing north and east can also be placed with potted plants. The balcony facing west, with strong sunshine in the west in summer and afternoon, is hot and dry, which is easy to cause dead leaves and yellow leaves of Cycas and is not suitable for placing potted plants. In hot and dry weather in summer, the balcony floor should be watered several times a day to reduce the temperature and increase the air humidity. Cycas should not be placed in the living room hall for too long, lacking light, with slender leaves and green leaves. You can put it in the hall for a long time in cold winter, and then put it on the balcony when it is sunny.
Four, pests and diseases and their prevention and control
(1) Spot disease is a fungal disease. After infection, the leaves are light brown spots at first, and then spread into a nearly round or irregular shape with a diameter of1~ 5 mm. The center of the lesion is dark brown to grayish white with reddish brown edges, and black spots appear on the lesion. Because of the connection between the diseased spots, segments of spots are formed, which leads to the death and fragmentation of leaves. In hot and rainy weather, the disease spreads easily. In terms of prevention and control, cultivated soil should be suitable for slightly acidic sandy soil, watered thoroughly with clear water in summer, and diseased old leaves should be removed in time. At the initial stage of the disease, 600 times bordeaux mixture or 75% chlorothalonil wettable powder, 800 ~ 1000 times 50% thiophanate wettable powder, or 1000 times potassium permanganate were sprayed every day, and the effect was good.
(2) scale insects. The planting and maintenance of the balcony, ventilation and light transmission are not good enough, and the leaves are often vulnerable to scale insects. At the early stage of the disease, there are several preventive and therapeutic methods: ① Add water to white wine at the ratio of 65,438+0: 2, and thoroughly pour the topsoil every half month for four consecutive times, which will have an effect. ② Repeated rubbing of injured leaves with alcohol can kill adults and larvae. (3) Soaking rice vinegar with cotton balls and gently rubbing the damaged leaves can wipe off the scale insects and kill them, and also make the leaves turn green and shiny again.
Strange news and interesting events
As the saying goes: "Cycas bloom, the dumb talk", Cycas rarely bloom, and the results of Cycas are even rarer. In 20 16, a cycad tree in the home of Mr. Wei, a resident of Zhongcheng Community, xuyong county, Luzhou City, Sichuan Province, not only blossomed, but also produced a nest of "phoenix eggs", which amazed neighbors one by one. [6]
The role of cycads in geomantic omen. Cycas, also known as fire banana. Cycas have long and narrow leaves with a yellow spot in the middle. Cycas have a strong meaning and can supplement the qi and blood of the house. It is an ideal home feng shui plant, which can be placed on the balcony and living room. But it is not suitable for people who have Chinese zodiac animals such as dragons, dogs and rabbits at home. Then let's take a look at the role of Cycas in Feng Shui.