Aphids
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关于这种疾病
Aphids are small sap-sucking insects that cluster on tender new growth and leaf undersides. They are common on bonsai from spring through autumn; left unchecked, they can weaken the tree and trigger sooty mold.
主要症状
- Clusters of green, black, or brown insects appear on new shoots and leaf undersides
- Leaves and stems become sticky from honeydew deposits
- Leaves curl and turn yellow
- Ants may be frequently observed on the tree
主要原因
- Rising temperatures from spring onward activating aphid reproduction
- Poor air circulation allowing colonies to establish
- Excess nitrogen fertilization producing tender, pest-attractive new growth
- Absence of natural predators such as ladybugs in the surrounding environment
预防（栽培环境与日常管理）
Position trees with good air circulation and inspect new growth regularly for early detection. Avoid excess nitrogen fertilization. Be alert to increased ant activity on the tree, which often indicates aphid presence.
相关图鉴
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观察情况，若恶化请咨询专卖店专卖店·园艺可做的处理？
Specialist bonsai nurseries and growers can advise on management options appropriate to the severity of infestation and on environmental adjustments to prevent recurrence.
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