Bonsai, as a traditional art form in our country, is deeply loved by people for its unique shaping and profound cultural heritage. During the maintenance process, many bonsai enthusiasts will encounter a problem - black spots appear on the leaves of the bonsai, which not only affects the aesthetics of the bonsai but may also threaten its growth. This article will unveil the secrets of black spots on bonsai and provide effective prevention and treatment methods.
Common Reasons for Black Spots on Bonsai1. Disease Infection
Black spots on bonsai leaves may be caused by disease infection, such as leaf spot disease, anthracnose, and black spot disease. These diseases are usually caused by fungi and can be transmitted through air, soil, watering, etc.
2. Pest Invasion
Some pests, such as scale insects, aphids, and red spiders, can also cause black spots on the leaves of the bonsai. These pests absorb the sap from the leaves, causing them to turn yellow, wither, and even develop black spots.
3. Improper Maintenance
Overwatering, improper fertilization, and insufficient lighting can also cause black spots on the leaves of the bonsai. These issues can affect the normal growth of the bonsai, lower its resistance, and make it susceptible to diseases and pests.
Prevention and Treatment Methods for Black Spots on Bonsai1. Strengthen Disease Prevention
(1) Choose bonsai varieties with strong disease resistance, such as five-needle pine, Huangshan pine, etc.
(2) Maintain good ventilation in the bonsai environment and avoid high humidity.
(3) Regularly spray fungicides such as carbendazim and carbaryl to prevent diseases.
2. Strictly Control Pest Infestation
(1) Regularly inspect the bonsai and remove pests in a timely manner.
(2) Use biological pesticides such as abamectin and pymetrozine to reduce pest density.
(3) Use physical methods such as yellow boards and insect traps to attract pests for easy removal.
3. Optimize Maintenance Measures
(1) Water properly to avoid积水 and maintain soil breathability.
(2) Fertilize scientifically according to the growth stage and needs of the bonsai, and apply nitrogen, phosphorus, potassium, etc. appropriately.
(3) Ensure adequate lighting and avoid keeping the bonsai in a dark environment for extended periods.
Black spots on bonsai are common problems during maintenance. Understanding their causes and taking effective preventive measures can ensure the healthy growth of the bonsai. It is hoped that this article can provide useful references for the majority of bonsai enthusiasts.
References:[1] Zhang Xiaohui, Wang Lihua. Research on the Control Techniques of Bonsai Diseases and Pests [J]. Plant Protection, 2015, 41(2): 123-126.
[2] Li Ming, Zhang Wei. Comprehensive Control Techniques of Bonsai Diseases and Pests [J]. Plant Protection, 2016, 42(3): 145-148.
[3] Zhao Yonggang, Liu Yang. Research Progress on the Control of Bonsai Diseases and Pests [J]. Plant Protection, 2017, 43(4): 159-162.