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Pittosporum sucker is a sap sucking insect that can spoil the appearance of pittosporum by causing discoloration and distortion of leaves.
Pittosporum sucker (Trioza vitreoradiata) on Pittosporum
There are several species of sucker or psyllid that can be encountered by gardeners, they are sap sucking true bug. Pittosporum sucker feeds on sap from foliage of pittosporums during the spring and summer, this can result in distorted discoloured leaves.
Pittosporum leaves develop pale yellow bulges and distorted growth. Young leaves are particularly prone to damage.
Damage by pittosporum sucker is unlikely to cause a serious lack of vigour in the plants although it can affect appearance. Therefore light infestations can be tolerated.
In light infestations damaged leaves can be pruned out.
Pesticides for gardeners (Adobe Acrobat pdf document outlining pesticides available to gardeners)
Originating from New Zealand, pittosporum sucker became established in south west England in 1993 and is has now spread throughout southern England, is established in parts of Scotland and also occurs in Ireland.
The whitish green nymphs are extremely flat and, almost scale-like in appearance. The yellowish green adult insects have two pairs of wings which are held in a roof-like fashion over the insect’s abdomen when at rest and are usually 3-4mm long. There are several generations during the summer with most damage occurring when new growth is developing.
Chemical labels explained
Chemicals: using a sprayer
Chemicals: using safely and effectively
RHS Scientific article on pittosporum sucker
RHS statement on pesticides in horticulture
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