With the improvement of people's living standards, home gardening has become a fashion. Zigzag海棠, as one of them, is deeply loved by flower enthusiasts for its unique shape and color. In the process of maintenance, many flower friends will encounter a problem: the back of the Zigzag海棠 leaves turn black. This article will provide a detailed analysis of the causes of this phenomenon and prevention methods.
Reasons for the blackening of the back of Zigzag海棠 leaves1. Fungal infection
The most common reason for the blackening of the back of Zigzag海棠 leaves is fungal infection. When fungi invade the leaves, it can cause spots and lesions on the leaves, and in severe cases, it can cause the back of the leaves to turn black.
2. Pest damage
Pest damage is also one of the reasons for the blackening of the back of Zigzag海棠 leaves. Common pests include scale insects and aphids, which extract nutrients from the plant's body, causing the leaves to turn yellow and black.
3. Environmental factors
Environmental factors can also cause the back of Zigzag海棠 leaves to turn black. High temperatures, insufficient light, and improper watering can all affect the growth of Zigzag海棠 and cause the leaves to turn black.
4. Improper fertilization
Improper fertilization is also one of the reasons for the blackening of the back of Zigzag海棠 leaves. Over-fertilization or improper fertilization can lead to an imbalance of nutrients in the soil, thereby affecting the normal growth of the plant.
Prevention methods for blackening of the back of Zigzag海棠 leaves1. Clean the leaves
promptly remove the lesions and pests from the back of the Zigzag海棠 leaves. You can use a damp cloth to wipe or use a diluted disinfectant to wipe.
2. Prevent and treat fungal infections
For leaves that turn black due to fungal infections, the following measures can be taken:
(1) Adjust the watering frequency, keep the soil moist, and avoid waterlogging.
(2) Increase light appropriately to promote plant growth.
(3) Spray fungicides such as carbendazim and mancozeb, applying once every 10-15 days.
3. Prevent and treat pest damage
For leaves that turn black due to pest damage, the following measures can be taken:
(1) Regularly inspect Zigzag海棠 and deal with pests in a timely manner.
(2) Spray insecticides such as pymetrozine and avermectin, applying once every 7-10 days.
4. Adjust environmental factors
For leaves that turn black due to environmental factors, the following measures can be taken:
(1) Maintain a suitable temperature and avoid being too high or too low.
(2) Increase light appropriately to avoid insufficient light.
(3) Water properly to avoid waterlogging.
5. Fertilize properly
For leaves that turn black due to improper fertilization, the following measures can be taken:
(1) Fertilize according to the growth stage and needs of Zigzag海棠.
(2) Avoid over-fertilization to prevent an imbalance of soil nutrients.
The blackening of the back of Zigzag海棠 leaves is a common maintenance issue. Understanding its causes and prevention methods is of great significance for the maintenance of Zigzag海棠. I hope this article can provide you with help and allow you to raise healthy Zigzag海棠.