桃花美人, as a popular indoor ornamental plant in recent years, is loved by many plant enthusiasts for its unique leaf shape and color. However, the problem of blackening leaves often plagues plant lovers during maintenance. This article will reveal the possible causes of blackening leaves in桃花美人 and provide corresponding prevention and treatment methods.
Reasons for the Blackening of桃花美人 Leaves1. Grey Mold Disease
Grey mold disease is one of the main causes of blackening leaves in桃花美人. This disease usually occurs in high temperature and humidity environments, where the pathogen invades the leaves, causing them to blacken and rot.
2. Black Spot Disease
Black spot disease is also a common disease that causes blackening of桃花美人 leaves. After the pathogen invades the leaves, it forms black spots, which can cause the leaves to wither severely.
3. Red Spider Mites
Red spider mites are common pests that extract the sap from 桃花美人 leaves, causing them to blacken and wither.
4. Root Burn
Improper watering of 桃花美人, such as too much or too little, can damage the roots and cause the leaves to blacken.
Prevention and Treatment Methods for Blackening of桃花美人 Leaves1. Prevention and treatment of grey mold disease and black spot disease
- Maintain good ventilation and avoid keeping the plant in a damp environment for extended periods.
- promptly remove affected leaves and incinerate or bury them deeply.
- Spray the leaves with a 75% wettable powder of carbendazim at a concentration of 1000 times, spraying every 7-10 days for 2-3 times.
2. Prevention and treatment of red spider mites
- Spray the leaves with a 40% emulsifiable concentrate of abamectin at a concentration of 1500 times, spraying every 7-10 days for 2-3 times.
- Clean the surface of the plant to remove the eggs and adults of red spider mites.
3. Prevention and treatment of root burn
- Control the watering frequency and avoid overwatering.
- If root rot is found, promptly cut off the rotting part, soak the roots in a carbendazim solution, and then replant.
The blackening of 桃花美人 leaves may be caused by various reasons, including diseases, pests, and improper watering. Understanding the cause of the disease and taking corresponding preventive and treatment measures can ensure the healthy growth of 桃花美人. We hope that this article can provide you with assistance in dealing with the problem of blackening leaves in 桃花美人.
References:
[1] Zhang Xiaoli, Li Ming. Indoor ornamental plant disease diagnosis and prevention [J]. Plant Protection, 2018, 44 (2): 1-5.
[2] Wang Xiaodong, Liu Yang. Indoor ornamental plant disease and pest control technology [J]. Plant Protection, 2019, 45 (1): 1-4.
[3] Chen Xiaohong, Zhang Min. Research progress on the control of diseases and pests of indoor ornamental plants [J]. Plant Protection, 2017, 43 (3): 1-6.