Low infestations result in leaf wilt and abscission. Heavy infestations may result in leaf drop, branch dieback and tree death. Infested leaves are covered with waxy secretions and honeydew, on which sooty mould grows.

Tree Protection Co-operative Programme
Red gum lerp psyllid / Glycaspis brimblecombei
Download PDFGlycaspis brimblecombei
Common NameRed gum lerp psyllid / Glycaspis brimblecombei
Scientific NameGlycaspis brimblecombei
OriginAustralia
Distribution in South AfricaEastern Cape, Free State, Gauteng, KwaZulu-Natal, Limpopo, Mpumalanga, North West
Symptoms
Biology
Adults are mobile and females are reported to lay up to 700 eggs. The eggs hatch in 10-20 days and the nymphs will pierce the plant tissue with their stylet (mouthparts), feeding on the xylem. The nymphs develop under white, conical structures called lerps which they build from exuded sugars and wax. In Australia there are two to four generations per year.
Management
The parasitic wasp, Psyllaephagus bliteus, was reported in South Africa in 2015. Planting of resistant material is also a possible management strategy.
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