What should I do if the leaves of Ping An tree grow spots?
As a common indoor leaf-viewing plant, Ping 'an tree is deeply loved for its oily leaves. When yellow-brown patches are found on leaves, a red light often turns on indicating the health of the plant. This paper systematically analyzes the three major causes and provides a complete solution to the problem of long leaf spots in Pingan trees. Guidelines for the Prevention and Control of Ping 'an Tree Leaf Spot Disease Characteristics Identification of Fungal Leaf Spot Disease (T-J) diseases are easy to cause in high temperature and high humidity environments. At the beginning, it is manifested as a round melasma of 3-5mm on new leaves. As the pathogen spreads, the center of the disease spot turns into carbon black color and produces ring patterns, and the back of the leaves shows obvious purple halo. It is recommended to use 800 times of 50% carbendazim wettable powder and spray it alternately with 75% chlorothalonil solution, and apply it once every 7 days. Improvement can be seen for 3 consecutive weeks. Scientific application of fungicides For small potted plants, Daknin ointment can be diluted 200 times and applied to the disease spots. After application, scattered light needs to be maintained for 6 hours per day, and combined with the stimulation of a temperature difference of 5-8℃ day and night, the plant's disease resistance mechanism can be activated. Focus on spraying areas with dense stomata on the back of the leaves. The drug absorption efficiency in this area is 40% higher than that on the leaves. Tips for root maintenance of safe tree: Emergency treatment of rotten roots. When rotten roots are caused by excessive fertilization, immediately remove the pot and prune the black roots to retain healthy roots with a diameter of>2 mm. Use a mixed substrate of vermiculite + perlite (1:1) for re-planting. After planting, spray is used instead of traditional watering, and the humidity of the substrate is maintained at 30%-40%. After the new buds germinate, supplement organic liquid fertilizer containing fulvic acid every month. Outdoor maintenance of key parameters for environmental control needs to ensure that the night temperature is>15 ° C and the air humidity is maintained at 60%-70%. It is recommended to use a double-layered sunshade net to build a transitional environment to avoid damage to callus caused by direct light. After the new leaves are unfolded, the "441" fertilization method is implemented: 4 weeks interval, 4 elements (nitrogen, phosphorus, potassium and magnesium), and 1‰ concentration solution. The daily maintenance system of Ping An Tree has established a "three inspections and three adjustments" maintenance mechanism: checking leaf back eggs, soil EC value, and stem hardness; adjusting the light cycle, ventilation intensity, and nutrient ratio. It is recommended to use a smart flowerpot monitoring system to automatically warn when the soil pH deviates from the range of 5.5-6.5 to prevent the recurrence of leaf spot disease from the root cause.
Through three-dimensional management of pathogen control, root restoration, environmental regulation, and regular use of EM bacteria to improve soil flora, it can be ensured that Ping An trees remain jade-like luster throughout the year. Remember to conduct foliar microscopic examination every quarter. Early detection and early treatment are the core elements of maintaining plant health.