In the process of orchid maintenance, orchid seedlings often grow slowly due to diseases and insect pests, ramets overwork, improper cultivation, and plant aging, and show yellowing, rot, and rotten buds. If the rescue measures are not taken in time, these sick and fragile orchids will lose their ornamental value and eventually fail to survive. In particular, for some rare and precious varieties, they will no longer be able to escape. The ambulance of weak orchids is indeed a problem worthy of attention for the lover. Here are some of the successful experiences described below for the benefit of our friends.
First, strict disinfection
Remove the blue seedlings from the original pot, discard the original soil and carefully clean the root system. Cut the roots, roots, and roots with sterilized scissors, then soak in a 0.5% solution of thiophanate-methyl or potassium permanganate for 5-10 minutes. Drain it and dry it. Repeat this two or three times. To completely kill pathogens. Note that when immersed in the roots, the pseudobulbs can be immersed for the first time. Do not allow the leaves to become stagnant. At the same time, the above liquid can be diluted 5 times and sprayed on the leaves.
Second, change the basin
Planting and curing sick and weak orchids are preferred for tile basins and zisha pots. It is better to use new pots that are not in use, because the old pots must have some fungi and bacteria that cause orchid diseases. To use the old pot, it is safer to clean it and expose it for a few days or pour it with boiling water. Pots should be used at the bottom of the basin for permeable ventilation. You can purchase a special hydrophobic cover, but you can also use natural materials such as peach kernels, walnut shells. The pot height should be 1/3-1/2 of the pot height, and the volume of the pot should not be large. The roots of sick and weak orchids are relatively fragile. If the basin is too large, it will easily lead to water accumulation, leading to decay of orchid roots. Using small pots can avoid this problem.
Third, select the matrix
Weak and weak seedlings have poor adaptability. The best medium for cultivation is to use medium-grown medium with less fat and better ventilation and air permeability, such as ceramsite, foamed stone, coarse sand, broken bricks, and eucalyptus. , gravel and so on. The roots and pseudobulbs of the blue plants can also be coated with water moss and then planted in pots to which the above substrate is added, and the effect is also good. All substrates need to be sterilized before use. It is not appropriate to use humus to grow weak seedlings. First, humus soils are collected from forests and there are many bacteria, which are difficult to sterilize completely. Second, humus soil is easy to be used after being used for a period of time, and the permeability is poor, which inhibits the growth of orchid roots.
Fourth, regulate temperature and humidity
Plant weaker blue seedlings to be slightly deeper to protect pseudobulbs and keep them moist. The basin's matrix should be kept in a moist state, too much or too little water is not conducive to rejuvenation. During the hibernation period, the matrix can be appropriately increased, and pseudobulbs are usually covered to keep the pseudobulbs moist and play an antifreeze effect. In the spring of the following year when the temperature is higher than 15°C, the substrate added in the winter of the previous year should be subtracted in time to facilitate the germination of the new shoots. Normal temperature should be maintained at 18-28 °C.
Lan Miao should be placed in a place where visible light is scattered and protected from direct sunlight. Some basins and sinks can be added around the basin to increase the environmental humidity.
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