Common Pests and Control Methods of 八角金盘
As a leaf-viewing plant favored by gardening enthusiasts, 八角金盘 is often affected by pest problems, which can impact its ornamental value. This article systematically analyzes the characteristics of three common pests and scientific control solutions to help you create healthy plants.
Characteristics and Comprehensive Control of Red Spider Infestation
Symptom Identification and Harm Cycle
Red spiders harm leaves through their刺吸式口器, initially showing yellowish-white spots, and when severe, the entire leaf becomes yellow and curled. This pest繁殖 rapidly in dry environments, with spring and autumn being the peak seasons. A single female can lay 50-100 eggs.
Graded Control Strategies
Mild infections can be washed off with a high-pressure water gun on the back of the leaves, combined with spraying a chili water extract (1:10 concentration). In severe outbreaks, it is recommended to alternate between 43%联苯肼酯 suspension and 20%哒螨灵 emulsion, spraying every 7 days, with special attention to applying on the back of the leaves.
Techniques for controlling Aphid Populations
Pest Identification Features
Aphids gather on the tender tips, secreting honeydew that induces sooty mold. Affected leaves show irregular curling, new buds are hindered in development, and they also spread various plant viruses.
Ecological Control System
Introduce七星瓢虫 (adults with a daily prey capacity of 150) to establish a biological defense line. Chemical control recommends a 10%吡虫啉 wettable powder concentrate at 2000 times, combined with yellow sticky traps for physical control, achieving three-dimensional prevention and control.
Key Technology for Eradication of Red Scale Insects
Key Points for Pest Identification
The female insects are covered with a red waxy shell, often attached to the base of the leaf veins. Where the insects are dense, a black mold layer can be seen, causing the photosynthesis rate of the plant to decrease by 40%-60%.
Key Control Timing
Use 22%噻嗪酮 suspension at 1500 times during the nymph hatching period (late May). After winter pruning, apply lime sulfur solution (5 degrees Baume) to seal wounds and reduce the overwintering population.
Establish a preventive maintenance system: maintain ventilation (keeping air humidity between 60%-70%), regularly remove dust from the leaves, and apply seaweed acid water-soluble fertilizer monthly to enhance plant resistance, which can reduce the probability of pest occurrence by 80%.