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Identifying scale insects on Nandina
Brown, tan, or white shell-like bumps on stems and leaves. Can look like part of the plant.
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Life cycle
Crawlers emerge from under scale and disperse. Settled scales are immobile under protective shell.
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Damage to Nandina
Sap-sucking weakens plant. Honeydew leads to sooty mould. Heavy infestations cause dieback.
healing
How to treat scale insects on Nandina
Scrape off manually. Apply horticultural oil. Systemic insecticide for severe cases.
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Preventing scale insects on Nandina
Inspect new plants. Avoid stress conditions that weaken plants.