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Psyllids
Order Hemiptera: Family Psyllidae
Psyllids are tiny sap sucking insects which attack
mostly native plants such as lillypilly. These 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. There are many psyllids, all of which
are relatively host specific. For example, Eugenia psyllid
occurs mainly on Australian brush cherry
(Syzygium paniculatum), Acacia psyllids occur on wattles
and albizzia, and Blue Gum psyllid occurs on eucalypts
which have waxy blue young leaves.
Symptoms
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.
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