Scale insects
Scales are limpet-like insects that feed by sucking sap from a wide range of plants, including houseplants, greenhouse plants and many fruit and ornamental plants grown outdoors. Scale insects weaken plants and some excrete a sticky substance (honeydew) on foliage, which allows the growth of black, sooty moulds.
© The Royal Horticultural Society 2011 / RHS Registered Charity № 222879/SC038262
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