What is the Reason Behind the Oily Leaves of Anthurium
As a popular choice for indoor greenery, the glossy and shiny leaves of Anthurium are a highlight for observation. However, when the leaves produce abnormal oily secretions, it often causes concern among plant enthusiasts. This article will systematically analyze the three main causes of the oily leaves in Anthurium and provide corresponding scientific solutions.
Analysis of the Causes of Oily Leaves in Anthurium
Natural Oil Secretion Mechanism
The leaves of Anthurium have special oil glands that convert photosynthesis into a natural wax layer. This oil not only gives the leaves a leathery luster but also serves as the plant's self-protection mechanism against UV radiation and reducing water evaporation. In the metabolic cycle of healthy plants, a trace amount of oil film is produced about 1-2 times a month, which is a normal physiological phenomenon.
Warning Signal of Pest Infestation
When the oily substance is accompanied by a sticky sensation, it is necessary to be vigilant against aphid damage. These pests secrete honeydew when they feed with their piercing-sucking mouthparts, forming an oily film-like covering. Persistent infestation can lead to leaf curling and deformation. Statistics show that the mortality rate of plants with untreated pest infestation can reach 65%. It is recommended to use a combination of biological control and chemical agents: first, use a cotton swab dipped in 75% alcohol to kill visible pests, then alternately spray imidacloprid (2000 times solution) and matrine (a natural plant-derived pesticide), with a 7-day interval between applications, and continue for 3 times to completely eradicate the problem.
Emergency Response to Mechanical Damage
Leaf damage triggers the plant's trauma protection mechanism, causing the secretion of callus tissue fluid containing terpenoids at the wound site, which forms an oil film when exposed to air. It is recommended to promptly prune leaves with damage exceeding 1/3 of their area, leaving the intact petiole to promote the germination of new buds. After pruning, apply charcoal powder or cinnamon powder to the cut surface, which can stop bleeding and has antibacterial properties.
Key Points for Daily Maintenance of Anthurium
Maintain a growth temperature of 18-28°C and keep the air humidity between 60%-80%. Use ceramsite to improve drainage, and apply phosphorus-potassium slow-release fertilizer monthly. Regularly wipe the leaf surface with a soft cloth soaked in diluted beer (1:50), which can clean oil stains and supplement amino acids.
By scientifically understanding the essence of the oily leaf phenomenon in Anthurium, it is possible to avoid excessive intervention that may damage the plant and to timely prevent potential risks. It is recommended to judge based on the overall condition of the plant. When accompanied by growth stagnation or leaf yellowing, consider adjusting the maintenance plan by considering comprehensive environmental factors.