How to prevent orchid pests

1. The matrix is too wet or too dry

There is a big difference between raising orchids on the balcony and the ground. The orchid basin on the ground is directly connected with the earth, can maintain moist, and because of the high humidity of the air, it is easy to raise orchids. And the balcony orchid, all rely on manual regulation, strong light, low humidity, improper management, it is easy to cause too wet or too dry or because of soil consolidation, impermeable, easy to produce bacteria. Here, I quote a passage from Linghai Lanyan written by qu Jinze at the end of the Qing Dynasty as an appropriate analysis: "Orchid is born by Yin and Yang in the course of Qi exchange, and if Yin and Yang are partial to each other, then Orchid is sick!" For those who are sick in Yang, the leaf tip is often scorched, the light is not connected, and the heavy tail is fully scorched. For those who are sick in Yin, the leaves give rise to black spots, the light ones are impenetrable, and the heavy ones are all black. Ye Jiao root has not yet been hurt, but it can still grow in spring. The root of the black must rot, and it cannot be recovered unless it has been cultivated for years. Lanfei is not as good as the law by hand (expert) planting. Deep basin root shallow and basin wide gun (that is, seedling) less, then the soil qi is not clear, Yin disease is also. The shallow root of the basin is long and there are many narrow guns in the basin, then the soil paste is not moist, and the yang disease is also. If the mud is too thick and too loose, the moisture will not be left, and the yang disease will also be affected. Mud is too fine and too solid, then stagnant water is easy to silt, Yin disease is also. The mud is not as good as the law, remove the noodle mud layer by layer, lift the new mud, do not move the blue root, the safest. The basin is not as good as the law, although it is not the right time, we should change the basin and replant it. If the cover is too thin, it will be Yang disease; if it is too dense, it will be Yin disease; if you irrigate too much, it will be Yin disease, and if you have too little, it will be Yang disease. The disease is caused by people who live. If the wind is high and things are dry, if it is fumigated in hot heat, it will be Yang disease; if it is dripping with rain for a long time, and if it is killed by severe frost, it will be Yin disease. The disease is caused by heaven. Zhang Zhongjing said: 'those who see Yang should be saved by Yin; those who see Yin should be saved by Yang.' People and things are the same. Yang disease hurts the top first, then the bottom; yin disease hurts the bottom first, then the top. As for the uneven dryness and dampness, and too much fertilizer, then the disease of yin and yang. The heavy ones can not be saved, while the light ones are bloated and reborn, which is called the leaves, which must be cut off or can be brought back to life. If you can't bear to give up love, it is tantamount to raising carbuncle for orchid. " This paragraph is very clear about the causes and harm of being too wet or too dry, and it is worth paying more attention to by the people who raise orchids.

II. Pollution and infection

The pollution source comes from toxic substances and dust in the air, wall dust, and orchid farmers use dirty water, thick fertilizer, and all kinds of garbage to pile up orchid basins, resulting in thick dust accumulation of orchid leaves, dirt cover of orchid pots, flowers and leaves, and stains all over the body. Orchids should pay attention to beautify the environment, pay attention to hygiene, often wash leaves to remove dust, and keep orchid pots clean. If there is more dust or disease spots in the orchid leaves, you can use cotton wool or toilet paper to gently wipe both sides of the orchid leaves or dip them in alcohol to keep the orchid leaves breathing smoothly and grow healthily.

The source of infection of bacteria (fungi and bacteria) or viruses comes from: ① Xinlan buys people with diseases and insect pests or carries human viruses without strict disinfection and sterilization. Some viruses, such as the Bayras virus, still have no cure, let alone disinfection, so only to enhance the ability to identify, do not buy, do not plant, root out. When ② pruning or ramet changing pot, the bacteria and viruses in the tool or matrix used were introduced into the orchid strain. Therefore, the tools should be disinfected before pruning, the matrix should be disinfected and sterilized, and the orchid plants should be disinfected before planting and wait for floating water to dry before planting. After planting, they should be placed in a cool place and watered two or three days later. After being used for a long time, ③ basin soil naturally breeds bacteria because it is too wet, airtight, acidic or alkaline.