Causes and preventive methods of dead seedlings of orchids

The orchid seedling appeared scorched tip, yellow leaf, yellow foot shell, rotten heart, rotten root, rotten Reed head, and finally the whole plant died, which caused huge economic losses to the national orchid boutique investors. orchid friends have different opinions, and the orchid is known only when it is difficult to raise. The main reasons are investigated and analyzed:

First, the fertilizer effect is too heavy. National orchid cultivation plant material should be thin rather than fertilizer, do not worry about insufficient fertility and add too much plant material containing fat, it is found that the cultivated soil is too fat, it should be replaced or technical treatment in time. During the period of national orchid management, if you rely on plant materials to grow normally, there is no need for additional fertilization. organic fertilizer is mainly applied when fertilizing, and organic fertilizer must be rotten before it can be used to fertilize orchids directly. Orchid special nutrients are usually also a kind of fertilizer, to prevent fertilizer damage caused by excessive application, do not be too thick when using organic fertilizer or chemical fertilizer, and thin fertilizer must be applied diligently.

The second is overdose. Any medicine has side effects, just like if a healthy person takes medicine every day, he will get sick if he is not sick. According to the different uses, the commonly used drugs in national orchid management can be divided into fungicides, insecticides and hormone drugs. the frequent use of different drugs or overdose use may cause drug damage. Give priority to prevention, prevention, strong growth of the national orchid can not use medicine, when there are diseases and insect pests really need to use appropriate amount of medicine. When the temperature rises and the humidity decreases, it is necessary to prevent the normal amount of medicine and fertilizer concentration from naturally increasing and injuring the seedlings.

Third, the temperature is too high. The national orchid needs to grow in a suitable temperature and temperature difference environment, the suitable temperature for the growth of the national orchid is 15 to 30 degrees, and the suitable temperature difference between day and night is 5 to 15 degrees. When the temperature of the basin soil is higher than 35 degrees, the temperature difference between day and night is extremely small, or the ultraviolet lamp is irradiated for a long time, the plant ducts that transport nutrients for the growth of orchids are extremely vulnerable to mechanical damage, the propagation speed of viruses and bacteria in the environment is extremely fast, and orchids are easy to be infected with virus bacteria and dead seedlings.

Fourth, the humidity is too high. The growing environment of national orchid should be dry rather than wet, and should not be watered too frequently, or in the hot season of high temperature and humidity, so as to prevent waterlogging from injuring roots and rotting heart and causing dead seedlings.

Fifth, the air permeability is not enough. Both the orchid basin and the orchid room need to be breathable, and the cultivated plant material should be thick rather than fine, and the orchid room should not be depressed. We should pay attention to ventilation to prevent the oil fume from the kitchen and factory from entering the orchid room, harmful gases breed virus bacteria, and it is easy to make orchids get sick.

Sixth, the score is too single. National orchid is a cluster plant, like to live in groups, generally can not separate plants too frequently and single planting, too single weak seedlings, old seedlings or diseased seedlings, poor disease resistance. To introduce disease-free strong new seedlings, found that infected orchid seedlings should be disinfected in time, isolation management, wait for normal growth can be put into the orchid room to prevent cross-infection. The ability of tissue culture seedlings and greenhouse seedlings to adapt to the natural environment is relatively weak, should be carefully taken care of, do not rush to success, pull seedlings to encourage.

One word: Guolan is killed by fat, medicine, heat, stains, suffocation, division, and also loved! I will publish orchid knowledge and pictures every day, take you in-depth understanding of orchids, teach you to easily raise orchids, you can always ask me or leave a message below if you don't understand orchids. If my knowledge brings you help, I hope you can help me or forward it to help more people!