With the improvement of people's living standards, more and more people are beginning to pay attention to their living environment, especially the growth status of indoor plants. Many flower friends have found that their flower leaves have small black spots during the process of raising plants. This not only affects the beauty of the plants, but may also have a certain impact on the growth of the plants. What exactly is the reason for the black spots on the flower leaves? And how should we deal with them?
Reasons for black spots on flower leaves1. Pathogen infection
The black spots on the leaves of plants are likely caused by pathogen infection. In a high temperature and humidity environment, pathogenic bacteria are prone to multiply, causing spots on the leaves of plants. Common pathogens include leaf spot disease, anthracnose, etc.
2. Pest damage
Some pests, such as scale insects and aphids, absorb plant sap, causing small black spots on leaves. The hatching of insect eggs on leaves can also cause leaf spots.
3. Fertilizer damage
Improper fertilization can cause black spots on plant leaves. Over-fertilization or the use of uncomposted organic fertilizers can lead to high soil salinity, thereby affecting the normal growth of plants.
4. Insufficient lighting
Leaves of plants are prone to spots when exposed to dark environments for prolonged periods. This is because insufficient lighting prevents plants from carrying out sufficient photosynthesis, leading to a decrease in resistance.
Solution1. Pathogen infection
After discovering black spots on plant leaves, the first step is to check if it is a pathogen infection. If it is, the following methods can be adopted:
(1) Timely remove the diseased leaves to prevent the spread of the condition.
(2) Spray the plant with a 50% carbendazim wettable powder solution diluted 800 times. Spray once every 7-10 days, for a total of 2-3 times.
2. Pest damage
For pest damage, the following measures can be taken:
(1) Manual removal: Regularly check the leaves of the plant and remove pests in a timely manner.
(2) Spray pesticides: Use a 10% imidacloprid emulsion diluted 2000 times or a 40% dimethoate emulsion diluted 1000 times to spray the plant. Spray once every 7-10 days, for a total of 2-3 times.
3. Fertilizer damage
For fertilizer damage, the following measures can be taken:
(1) Reduce the amount of fertilizer to avoid over-fertilization.
(2) Use decomposed organic fertilizers to reduce soil salinity.
4. Insufficient lighting
If the black spots on plant leaves are caused by insufficient lighting, the following measures can be taken:
(1) Move the plant to a location with sufficient lighting.
(2) Place a reflective board around the plant to increase lighting.
There are many reasons for black spots on flower leaves, including pathogen infection, pest damage, fertilizer damage, and insufficient lighting. By addressing the different causes with corresponding solutions, the growth condition of the plant can be effectively improved. When caring for plants, the following points should also be noted:
1. Maintain good ventilation to reduce the probability of disease occurrence.
2. Fertilize reasonably to avoid fertilizer damage.
3. Regularly inspect the plants and deal with problems in a timely manner.
By following the above methods, your plants can overcome the困扰 of black spots and grow healthily.