The Pests and Diseases of Qibao Tree and Their Control
As a unique succulent ornamental plant, the Qibao Tree is deeply loved by horticulture enthusiasts for its bamboo-like fleshy stems. However, during the maintenance process, problems such as yellowing leaves and stem rot caused by pests and diseases often困扰 growers. This article systematically analyzes the common characteristics of pests and diseases and their control measures for the maintenance pain points of Qibao Trees.
Identification and Management Plan for Qibao Tree Diseases
Typical Symptoms of Downy Mildew
Initially, a grayish-white mold layer appears on the back of the leaves. As the condition progresses, yellowish-brown spots appear on the leaves and gradually wither. This disease spreads rapidly in high-temperature and high-humidity environments (25-28°C), and it is necessary to check the plant's condition weekly.
Key Points for Diagnosing Soft Rot Disease
Water-soaked brown spots appear at the base of the stem, which can spread to the entire stem node within 48 hours, accompanied by a foul odor. This disease often occurs during the plum rain season and is closely related to soil waterlogging.
Three-Step Disease Control Method
1. Chemical treatment: Alternately use 10% acetic acid solution of 401 antibacterial agent (1000 times dilution) and 50% carbendazim wettable powder (800 times dilution). 2. Environmental control: Maintain a day-night temperature difference greater than 5°C and humidity below 60%. 3. Lesion treatment: Immediately remove diseased leaves and apply wood ash to the cut surface for disinfection.
Guide to Preventing and Combating Pests on Qibao Tree
Characteristics of Whitefly Damage
The insects gather on the back of tender buds to absorb sap, secreting honeydew that induces sooty mold, and can cause deformation of new buds in severe cases. This pest has overlapping generations and requires continuous control for three cycles.
Strategies for Aphid Control
The early spring budding period is a key prevention and control time. It is recommended to use 2.5% tabuca extract emulsion (1000 times dilution) combined with yellow sticky insect boards for physical control. When applying the pesticide, pay attention to spray the back of the leaves where eggs are concentrated.
Biological Control Plan
Introduce natural enemies such as ladybugs and green lacewings to establish an ecological control system. Use a high-pressure water gun to wash the plants weekly, which can remove more than 60% of the eggs.
Comprehensive Maintenance Management Suggestions
1. Substrate preparation: Perlite: peat soil = 3:1, ensuring good drainage. 2. Water and fertilizer management: Apply decomposed soybean cake water (diluted 1:50) every month during the growing period. 3. Environmental monitoring: Install a thermometer and hygrometer to maintain an ideal growth temperature of 15-25°C.
By establishing a preventive maintenance system and combining physical, chemical, and biological control methods, the incidence of pests and diseases in Qibao Trees can be effectively controlled. It is recommended that growers keep a maintenance log, recording the time and measures of each pest and disease occurrence, gradually forming a personalized control plan.