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Heavy cushion scale infestations result in the blackening of the foliage of camellia, holly, rhododendron, Trachelospermum and some other evergreen plants during the early months of the year.
Cushion scale (Chloropulvinaria floccifera) on Holly (Ilex aquifolium). Credit: RHS/Entomology.
Cushion scale is a sap-sucking insect that attacks the foliage of mainly evergreen trees and shrubs, especially camellia, rhododendron, Trachelospermum, Euonymus japonicus and holly.
Apart from the presence of honeydew and sooty mould cushion scale does not appear to adversely affect the vigour of its host plants.
Pesticides for gardeners (Adobe Acrobat pdf document outlining pesticides available to gardeners)
Camellia flower blight
Chemical labels explained
Chemicals: using a sprayer
Chemicals: using safely and effectively
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RHS statement on pesticides in horticulture
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