How to raise potted Dendrobium candidum?

Dendrobium candidum, also known as black section grass, Yunnan iron, iron, etc., is a herb of the genus Dendrobium of Orchidaceae, the stem is erect, cylindrical, and the raceme is often sent out from the upper part of the old stem with fallen leaves, the core column is yellow-green, the florescence is 3 ~ 6 months, and the stem is used as medicine. it is a yin-tonifying medicine in tonifying medicine, tonifying stomach, nourishing yin and clearing heat. Let's take a look at how potted Dendrobium candidum is raised.

Ecological habits of Dendrobium candidum

Dendrobium candidum likes warm, humid and semi-shady environment, and is not resistant to cold. The suitable temperature for growth is 18: 30 ℃, the suitable growth period is 16: 21 ℃, the dormant period is 16: 18 ℃, the night temperature is 10: 13 ℃, and the temperature difference is 10: 15 ℃. The daytime temperature more than 30 ℃ has little effect on the growth, the winter temperature is not lower than 10 ℃, and the seedlings are easy to be frozen when the temperature is below 10 ℃. Avoid dryness and avoid stagnant water. Prefer light, 50% shading in summer and autumn and 30% shading in winter and spring. If the light is too strong, the stem will be dilated and yellow, and the leaves will be yellowish green, but the sunshine is sufficient, the flowering is good, and the number of flowering is large. The soil should use well-drained and breathable broken fern root, water moss, charcoal chips, broken tiles, perlite and so on, mainly broken fern root and water moss.

Propagation methods of Dendrobium candidum

1. Ramet: 1-year-old or 2-year-old Dendrobium candidum plants with bright green color, strong germination, developed root system and no diseases and insect pests were selected as seed plants, withered branches, broken branches, old branches and overlong fibrous roots were cut off, and the clumps were divided into small clumps with 5-7 stems with leaves in each cluster.

2. Cuttage: Dendrobium candidum cuttings choose false bulbs that grow and enrich without flowering, cut them from the rhizosphere, cut them into segments every 2 to 3 segments, insert directly into peat moss or wrap the base of cuttings with water moss, keep moist, room temperature at 18: 22 ℃, rooting at 30 days after cuttings, and potted plants with roots 3 to 5 cm long.

3. Tissue culture: the tissue culture of Dendrobium candidum usually takes stem tip and leaf tip as explants, but the tissue culture seedlings should be refined for 14 days before cultivation. The specific measure is to move the tissue culture seedlings to the seedling refining room to make them gradually adapt to the natural environment in the open and changing environment. When the leaves of tissue culture seedlings are dark green, they can be planted in bottles.

How to raise potted Dendrobium candidum?

1. Flowerpots: potted Dendrobium candidum should choose flowerpots with larger caliber at the bottom or with holes around them, requiring good air permeability and good leachability. You can also fix Dendrobium directly on rotten wood without flowerpots.

2. Medium: Dendrobium candidum can not use soil species, it is best to use water moss, gravel, peanut shell, moss, coconut skin, pine bark, sawdust, charcoal, wood blocks and other media with good water retention and ventilation.

3. Environment: Dendrobium candidum is suitable to grow in a cool, humid and smooth air environment, so we should not keep it in the sun like other flowers and plants, but should pay attention to shading.

4. Planting: when planting Dendrobium candidum, we should try not to bury the stem of the seedling into the substrate, which can cover most of the roots and water thoroughly after planting.

5. Maintenance: after the planting of Dendrobium candidum, put the iron pot in a well-ventilated, semi-shaded environment, such as a well-lit windowsill, a balcony without direct sunlight or a sunshade.

Note: when the environment of potted Dendrobium is open, Dendrobium should always be placed under the balcony big-leaf plants, which block too strong light, and growers usually only water them, and new buds of Dendrobium grow rapidly in overcast and rainy weather.

Disease and pest control of Dendrobium candidum

1. Soft rot: soft rot is easy to occur in the environment of high temperature and high humidity, and the disease occurs quickly. In severe cases, the whole plant decays and disintegrates into wet rot. At the initial stage of the disease, the control effect of 2000 mg / kg of Kesha 101 wettable powder was the best, and the control effect reached more than 78% 12 days after spraying. At the same time, it is necessary to strengthen the management in the shed, pay attention to ventilation and light transmission and reduce the humidity in the shed.

2. Black spot: black spot harms leaves and wilts leaves, which usually occurs from March to May. 50% carbendazim 1000 times solution can be sprayed 2 times for 3 times.

3. Anthrax: anthrax harms leaves and fleshy stems, and brown or black spots appear in damaged leaves, which usually occur from January to May. 50% carbendazim 1000 times or 50% methyl topiramate 1000 times can be sprayed 2 times for 3 times.

4. Snails: snails are common pests that harm young stems, tender leaves, buds and young fruits. It can be controlled by artificial hunting, poison bait or sprinkling lime and tea bran.

5. Fei Shield scale: the Fei Shield scale parasites on the edge or back of the plant leaves and sucks sap, which is the peak incubation period in late May. 1000 times of 40% dimethoate EC or 1000 times of 50% malathion can be sprayed to kill insects, or the old branches concentrated in the scale can be burned.

6. Red spiders: red spiders can be controlled by removing weeds in the surrounding environment or spraying 800-million 1000-fold low-toxic acaricides, such as 40% dicofol.