Causes of blackening of emerald leaves. Prevention and control measures for blackening of emerald leaves As the temperature gradually increases, many flower lovers 'homes have begun to enter a period of vigorous growth. Many flower lovers have found that the leaves of emerald begin to turn black. phenomenon, which not only affects the appearance of emerald leaves, but may also affect its healthy growth. What is the cause of blackening of emerald leaves? This article will provide you with a detailed analysis. Reasons for blackening of emerald leaves 1. Disease infection The most common cause of blackening emerald leaves is disease infection. In a high temperature and humid environment, emerald flowers are easily infected with diseases such as black spot and powdery mildew, causing blackening of leaves and soil Pathogens may also invade plants through roots, causing blackening of leaves.
2. Improper water and fertilizer management. Water and fertilizer management is an important factor affecting the growth of kingfisher. If there is too much or too little watering, water accumulation or drought in the soil, it will lead to blackening of kingfisher leaves and improper fertilization, such as excessive fertilization or inappropriate fertilization., can also cause the leaves to blacken.
3. Insufficient light, chrysanthemums like light and need sufficient sunlight. If they are exposed to a dark environment for a long time, the leaves will turn black due to insufficient photosynthesis.
4. Insects and pests are also one of the reasons for blackening the leaves of the emerald. Pests such as aphids and red spiders will absorb nutrients from the emerald, causing the leaves to blacken. Prevention and control measures for blackening of emerald leaves 1. Prevent diseases-Maintain a good ventilated environment to avoid the occurrence of diseases.
- Regularly spray fungicides, such as mancozeb, carbendazim, etc., to prevent disease infections.
- When infected leaves are found, cut off promptly and destroy them centrally to avoid the spread of the disease.
2. Water and fertilizer management-appropriate watering to keep the soil moist and avoid water accumulation or drought.
- Reasonably apply fertilizer and select appropriate fertilizers according to the growth needs of emerald, such as nitrogen, phosphorus and potassium compound fertilizers, organic fertilizers, etc.
- Water in time after fertilization to avoid the fertilizer burning roots.
3. Increase the light-Place the emerald in a sunny place to ensure that it fully receives light.
- On rainy days, open curtains appropriately to increase indoor lighting.
4. Prevention and control of pests-Regularly inspect the emerald chrysanthemums and prevent and control pests found in time.
- Insecticides such as imidacloprid, avermectin, etc. can be used to spray them on the leaves of emerald flowers to eliminate pests.
There are many reasons for the blackening of emerald leaves. Flower friends should pay attention to prevention during the maintenance process and solve problems in a timely manner. Through scientific water and fertilizer management, reasonable lighting and pest control, we believe that emerald will thrive and bloom beautifully.