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Hemiptera / Psyllidae
Psyllids are tiny sap-sucking insects which attack plants such as lillypillies. Psyllids resemble miniature cicadas and can only be seen through a microscope or hand lens.
Both juvenile (nymphal) and adult stages do the damage by sucking sap from the leaves. Some Psyllids build a protective covering made from wax and honeydew.
New growth may have dimpling or pock marks on leaves. Leaves can be distorted and terminal shoots dieback. Leaf defoliation of some types of Psyllid attack may occur. Sooty mould grows on the crystal like honeydew that the Psyllids produce. Leaves may be discoloured.