Culture method of Wandai orchid

Wandailan is a general term for orchids of the genus Orchidaceae. There are about 50 primitive species, and the hybrid varieties are very rich, originating from India, Malaysia, the Philippines and other places. Chinese experts translated it as "Wandai" which probably means that it has strong vitality and can be passed on forever from generation to generation. The ornamental value is very high and can be watched throughout the year. Let's take a look at the breeding methods of Wandai Orchid.

The growth habit of Wandai orchid

Wandailan is afraid of cold and heat, waterlogging and drought. The temperature as high as 35 ℃ in summer has little effect on its growth, and it does not need to use a lot of plant materials in cultivation. Many flower farms in Thailand are very extensive in planting Wandailan. They often use wooden strips to nail into small square frames in which a few pieces of charcoal, broken bricks or coconut clothes can continue to grow. Some even hang up its plants with only a nylon rope and hang them under an orchid shed or tree, like a "duck". It can also grow leaves and blossom when sprinkled with water and fertilizer.

Propagation methods of Wandai orchid

Wandai orchids can be propagated with high buds. At the end of autumn, tall buds grow in the axils of leaves. When the tall buds grow to 5cm and 7.5cm, use a sharp and sterilized knife to cut off the tall buds from the mother plant and plant them in a basin filled with snake sawdust, which can be transplanted to a larger basin. Remember to apply medicine on the incision to avoid being infected by germs. In addition, when the plants cultivated for many years grow to more than 1 meter, the terminal buds about 30 to 46 centimeters long can be cut off, and the incisions on both sides can be sterilized, and then planted in the basin to keep them moist.

Culture method of Wandai orchid

1. Potted soil: the root of Wandailan belongs to aerial root, which can be applied to any medium with good drainage, such as snake sawdust, broken bricks, charcoal, coarse gravel sand, etc., whether used alone or mixed, it is a good basin soil.

2. Lighting: Wandailan usually needs strong light, 40-50% shading net in the local high temperature season, and even no shading in winter.

3. Temperature: Wandailan prefers high temperature environment, the most suitable temperature is 20-30 ℃, and the temperature as high as 35 ℃ in summer has little effect on its growth.

4. Water dampness: Wandailan must ensure adequate moisture and air humidity in daily management. The exuberant growth can be maintained by natural conditions in the rainy season. In the dry season, the air humidity must be kept at about 80% by artificial sprinkling.

5. Fertilization: Wandailan needs more fertilizer than other orchids, so during the period of vigorous growth, diluted fertilizer can be applied once every 7 to 10 days. The best fertilizer is the ratio of nitrogen, phosphorus and potassium at 10:10:5.

6. Change the basin: Wandailan should not change the basin frequently. Unless disturbed by diseases and insect pests, the basin can be changed at least once every 3 years. The Wandai orchid in spring is about to enter the vigorous growth period, which is a good time to change the basin.

Disease and pest control of Wandailan

1. Phytophthora

The disease occurs all the year round, but in the rainy season, the disease is the most serious when the water is too wet or poorly ventilated, especially the seedlings just out of the bottle are the most vulnerable. The infected site produced brown disease spot, which expanded rapidly in high temperature and humidity, and finally showed black brown spot, and deciduous stem rot until the plant died.

[prevention and treatment] ① avoids excessive dampness, improves ventilation conditions and has sufficient light. ② avoids partial use of nitrogen fertilizer and reduces plant overgrowth and weakness. ③ was sprayed with 1x800 carbendazim or 1x1000 Haoshengling liquid. The cut cut of ④ diseased plant was smeared with large cornflour and placed in a dry place without watering for a week, which could stop the spread of the disease.

2. Anthrax

[symptoms] too dense planting, poor ventilation, moisture imbalance or injured wounds are susceptible to diseases. At the initial stage of the disease, the leaves produce brown sunken spots, which later expand into round or irregular spots, and in severe cases, there is gangrene in the center of the spot.

[prevention and treatment] ① planting should not be too dense, increase light, drainage and ventilation should be good. ② culture of strong seedlings, do not often move plants, so as not to cause damage and disease. ③ cut off the diseased leaves and smeared the wound with 500x Dasheng-45 solution and 800x Vibrio. ④ was sprayed with 1 000 times thiophanate methyl or carbendazim once a week.

3. Soft rot

The disease is easy to occur when excessive application of nitrogen fertilizer is due to high temperature and humidity and poor ventilation in spring and summer. At the initial stage, the waterlogged disease spots were produced by bacteria invading the leaves or heart leaves, which expanded rapidly and contained more water, but in the later stage, the diseased leaves became yellow and fell off, and the whole plant died of soft rot. The disease spreads rapidly and must be prevented and treated as soon as possible.

[prevention] ① improves growth conditions, increases ventilation, and reduces temperature and humidity. The spread of the disease can be prevented by removing the susceptible part of ② and smearing it with antibiotic powder without watering for a week. ③ was sprayed with streptomycin 1000 times aqueous solution, stone sulfur mixture or Bordeaux solution once a week.

4. Leaf blight

[disease] the tip of the leaf produces small black spots, which gradually expand into irregular spots, the periphery of the spot is dark brown, the middle is grayish brown, and in severe cases, it spreads the whole leaf, and finally withered and fallen leaves.

[prevention and treatment] the diseased leaves were removed by ① and sprayed with 500x Dasheng-45 or 1000 times Haosheng. For ②-susceptible plants, Rain Water or stop watering should be avoided to prevent the disease from getting worse. ③ spray 500x Dasheng-45 regularly once a day as a precaution.