What is the reason why osmanthus leaves are dry and sharp?
The scorched tips of osmanthus leaves are a common maintenance problem, which not only affects the ornamental value but also threatens the health of the plants. This article analyzes the causes from six core dimensions to help you accurately diagnose and respond scientifically. Improper cultivation and management and unbalanced water control. The roots of osmanthus osmanthus are extremely sensitive to stagnant water, and the "see the dry and wet" irrigation method is needed. The ratio of high-quality humus soil + perlite (3:1) can improve drainage. Watering is recommended in the early morning in summer and noon in winter. Light intensity imbalance requires 6 hours of direct light in spring and autumn. In summer, 50% sunshade net protection is used. In winter, indoor maintenance should be placed within 1 meter of the south sill. The flowerpot should be rotated regularly to ensure uniform light reception. Abnormal air humidity fluctuations in environmental factors are monitored in real time using a thermohygrometer, and the RH is maintained at 60%-75% through an atomizing humidifier. Spray once in the morning and evening in the high temperature season, and be careful to avoid water droplets remaining on the leaves for more than 2 hours. Set a temperature warning mechanism for drastic changes in temperature: activate the insulation film when it is below 5℃, and activate the circulation fan when it is above 32℃. The temperature difference between day and night is recommended to be controlled within the range of 8-10℃. Disease invasion and control Fungal disease identification Brown spot disease shows the characteristics of concentric rings, dead spot disease is accompanied by gray halo, and (T-J) disease produces pink spore piles. It is recommended to use 800 times chlorothalonil solution every month for prevention, and use 1500 times difenoconazole solution during the onset period. The disease prevention and control system has established a three-level prevention and control of "prevention-monitoring-management": spraying Bordeaux mixture in spring, hanging yellow boards for monitoring in summer, and disinfecting with stone sulfur mixture when clearing fallen leaves in autumn.
By improving the cultivation substrate, optimizing environmental parameters, establishing a disease prevention system, and regularly applying potassium dihydrogen phosphate foliar fertilizer to enhance resistance, more than 85% of the leaf scorch problem can be effectively solved. It is recommended to conduct systematic inspections every month and establish a maintenance log to track the improvement effect.