The pennywort, named for its leaf shape resembling ancient coins, is a common ornamental plant. Many plant enthusiasts find that a mysterious powder often appears on the surface of its leaves. What is this powder, and how should it be dealt with? This article will unveil the causes of the powdery substance on pennywort leaves and provide corresponding care techniques.
Causes of the powdery substance on pennywort leavesThe powdery substance on pennywort leaves is actually caused by a fungal infection known as "powdery mildew." This fungus primarily parasitizes the leaves of plants, absorbing nutrients by secreting powdery mycelium. In severe cases, it can lead to leaf withering and falling, affecting the growth and ornamental value of the pennywort.
How to prevent the powdery substance on pennywort leaves1. Maintain a good ventilation environment: Pennywort thrives in well-ventilated conditions and avoids overly humid environments, which helps reduce the incidence of powdery mildew.
2. Regularly spray fungicides: Spray fungicides every 10-15 days during spring and autumn to effectively prevent powdery mildew.
3. Reasonable fertilization: Apply a moderate amount of compound fertilizer and avoid excessive application of nitrogen fertilizer to prevent excessive plant growth and reduced resistance.
How to deal with the powdery substance on infected pennywort leaves1. Remove diseased leaves: Once powdery substance is found on the leaves, immediately cut off the diseased leaves and burn or bury them to prevent the spread of pathogens.
2. Spray fungicides: Use a 25% wettable powder of carbendazim at 800 times dilution or a 50% wettable powder of thiophanate-methyl at 1000 times dilution to spray the plant, continuing for 2-3 times at 7-10 day intervals.
3. Improve the environment: Adjust the care environment, maintain plant ventilation, and reduce humidity to aid in recovery.
Pennywort care tips1. Avoid direct sunlight: Pennywort prefers a semi-shaded environment and should be protected from direct sunlight to prevent leaf burn.
2. Watering in a timely manner: Keep the soil moist but avoid waterlogging to prevent root rot.
3. Proper pruning: Regularly prune the plant to maintain an attractive shape and also promote growth.
The main cause of the powdery substance on pennywort leaves is powdery mildew. With proper care and preventive measures, the incidence of the disease can be effectively reduced. When diseased leaves are found, they should be dealt with promptly to prevent the spread of the condition. It is hoped that this article can provide help for your pennywort care, allowing your pennywort to grow robustly and become a beautiful landscape feature in your home.