1. The leaves caused by yellowing disease become black and scorched
If you want to prevent the problem of white orchids losing leaves, you must first understand the reasons. In fact, it is not difficult to find that when this happens, there must be a problem with plant management. One of the main reasons is that the leaves may be infected with yellowing disease. Symptoms of the disease show that the newly extracted buds at the top of the branches lose their proper green color, and then gradually show a top-down trend, slowly extending to the bottom. If timely measures are not taken to control it, the veins of the leaves will turn yellow, become scorched, and eventually fall off.
In this case, you can appropriately supplement the plants with some ferrous sulfate, which can be applied to the soil, or you can bury a small ferrous sulfate particle in the cortex below the plant, and then cover it with a plastic film After bandaging, you can also add water and spray it on the diseased leaves in the form of a spray. Repeat this operation for several cycles to cure the disease.
2. The leaves caused by anthracnose become black and scorched
The biggest harm of anthracnose is to attack the leaves of orchid. In the early stage, it mainly shows a small faded color on the surface of the leaves. The spots gradually enlarged and later developed to occupy half or even the entire leaf. The edges became scorched and the leaf edges turned black, and then they dropped more rapidly. The best way is to use the drug Anthrax Formica, mixed with water in proportion and sprayed on the affected area, which can improve the situation.
3. Black orchard leaves caused by improper maintenance
Scientific and reasonable maintenance of white orchids, proper lighting, watering, fertilization, and pruning of dead leaves.
Extended information
The white orchid plant is upright and branched, and is elegant. It can be cultivated in the open field in the south and is the backbone tree species in southern gardens. Northern potted plants can be used to decorate courtyards, halls, and conference rooms. Small and medium-sized plants can be displayed in the living room or study room. Because it is afraid of smoke, it should be placed in a well-ventilated place. In addition to its beautiful flowers and leaves, as a spice plant, white orchid can also be used as both spice and medicinal.
The growth environment of white orchids improves the growth environment of the residence and also improves the owner's dominant Feng Shui environment. White orchids like to be warm and moist. They should have good ventilation and sufficient sunshine. They are afraid of cold and avoid moisture. They neither like shade nor tolerate sunburn. Such living requirements give the owner a clue as to whether the home environment is suitable for warmth, moisture and humidity. The criteria for judging ventilation. If the white orchid in a home grows well, it proves that these conditions are met. These conditions are the criteria for judging whether the feng shui of a house is good or bad.
The white orchid is the national flower of Ecuador. The language of flowers, pure love, sincerity.
Baidu Encyclopedia - Bailan (Magnoliaceae)