Orchid, as one of the top ten famous flowers in China, has always been loved by people. Its elegant flowers and pleasant aroma are a favorite of many flower lovers. However, in the process of cultivating orchids, we may encounter some problems, such as the appearance of dark spots on the leaves of orchids. So, how to deal with the dark spots on orchid leaves?Below, we will introduce it to you in detail.
1. The cause of dark spots on orchid leaves.
1.Excessive ambient humidity: Orchids prefer a moist environment, but too much humidity can cause dark spots on the leaves. Because excessive humidity can easily cause pests and diseases, such as brown spot and anthracnose, these diseases can form black spots on the leaves.
2.Lack of light: Although orchids prefer a semi-shady environment, they will also have dark spots on their leaves when they are in a state of insufficient light for a long time. Because insufficient light will cause the plant to weaken photosynthesis, the nutrients in the leaves cannot be synthesized normally, resulting in dark spots on the leaves.
3.Insufficient nutrients: Orchids need sufficient nutrients to grow, and if they are not fertilized for a long time or improperly, dark spots will also appear on the leaves. Because the lack of nutrients can lead to stunted plant growth and development, melanin is deposited in the leaves, resulting in the formation of dark spots.
4.Pests and diseases: Black spots on orchid leaves can also be caused by pests and diseases. Pests such as aphids and spider mites can suck the sap of leaves, causing black spots to appear on leaves. In addition, bacterial infections can also cause dark spots on leaves.
2. Treatment method of black spots on orchid leaves.
1.Adjust the humidity of the environment: Keep the humidity of the orchid growing environment moderate and avoid too much humidity. You can open the windows regularly for ventilation or use a dehumidifier to adjust the humidity in the room. At the same time, it is necessary to pay attention to the growth of orchids, and deal with pests and diseases in time.
2.Increase light: Ensure that the orchid has the appropriate amount of light every day and avoid being in a dark environment for a long time. Orchids can be placed in a well-lit area, but avoid direct sunlight.
3.Reasonable fertilization: To provide sufficient nutrients for orchids, some organic fertilizers can be applied regularly, such as well-rotted cow manure, chicken manure, etc. At the same time, it is necessary to pay attention to the method and time of fertilization to avoid excessive fertilization or improper fertilization.
4.Prevention and control of pests and diseases: For orchids that have already appeared pests and diseases, measures should be taken to prevent and control them in time. Some biological pesticides or chemical pesticides can be used for spraying, and at the same time, it is necessary to pay attention to the growth of orchids to prevent the recurrence of pests and diseases.
In short, the treatment of black spots on orchid leaves needs to start from many aspects, not only to ensure the suitable growth environment of orchids, but also to pay attention to the prevention and control of pests and diseases. Only in this way can we raise healthy and beautiful orchids.
Autumn and Winter Check-in Challenge