The Reasons for the Leaf Zoom of Red Palm
As a popular ornamental plant, the issue of leaf withering困扰s many caretakers. The blackening and curling of leaf edges not only affects the ornamental value but may also indicate a health crisis of the plant. This article systematically analyzes the four main pathogenic factors and illustrates the key points of prevention and treatment with pictures.
Disease Invasion Leading to Red Palm Leaf Burning
Symptom Identification of Leaf Withering Disease
In the early stage of infection, needle-like brown spots appear on the leaves, which expand to withered patches with a diameter of 0.5-1cm within 48 hours, with a visible yellow halo around the lesion edges. Under a microscope, the conidiomata are arranged concentrically.
Comprehensive Treatment Plan
Timely removal of diseased leaves followed by消毒剪刀 with 75% alcohol, alternatingly spraying benomyl and pyraclostrobin, once a week for three weeks. Combined with increased application of phosphorus and potassium fertilizers to enhance disease resistance.
Improper Lighting Causing Burnt and Withered Leaves
Lighting Demand Standards
Red palm is suitable for 15,000-25,000Lux scattered light, and direct sunlight at noon can reach up to 100,000Lux. It is recommended to use a shade net to filter 60% of the strong light or place it 2 meters away from an east-facing window sill.
Emergency Treatment for Burnt Leaves
Burnt plants should be immediately moved to a shaded environment, prune leaves with more than 50% burnt area, and spray a 0.1% vitamin B1 solution to promote recovery.
Humidity Imbalance Causing Leaf Edge Withering
Precise Humidity Control
Use a thermometer and hygrometer to monitor, maintaining a range of 60-80%RH. Use an ultrasonic humidifier during dry seasons, combined with wet pebbles in a tray for double moisturizing, avoiding direct spraying of water on flowers.
Key Points of Air Circulation
Ensure at least 4 hours of ventilation per day, use a circulation fan at low speed to promote air movement, but avoid the air conditioner outlet.
Fertilizer Burn Leading to a Chain Reaction
Scientific Fertilization Standards
Use N-P-K=20-20-20 water-soluble fertilizer during the growing period, with the concentration strictly controlled at 800-1000 times, switching to a dilute fertilizer of 3000 times in winter. Solid fertilizers should be applied 5cm away from the rootstock in a circular manner.
Measures to Rescue Fertilizer Burn
Immediately immerse the pot and wash the roots for 2 hours, replace the new medium and water with a rooting agent. Apply brassinolactone to the damaged leaves for repair.
Through disease prevention, lighting adjustment, humidity management, and precise fertilization, a four-dimensional maintenance system can effectively prevent red palm leaf withering issues. It is recommended to conduct monthly leaf inspections, use an EC pen to monitor fertilizer solution concentration, and combine smart environmental monitoring equipment for precise care.