This is the first report of Marchalina hellenica in Australia. Preliminary evidence indicates that the pest is restricted in its distribution.
Marchalina hellenica can infest a range of different pine species, but has only been detected on Pinus radiata and Pinus halepensis).
Marchalina hellenica is a sap-feeding insect. It produces large amounts of honeydew on which sooty moulds develop. It prefers the lower part of the tree and mainly nests on the main trunk, but infestations can be also observed on branches and even exposed roots. It can be found in bark crevices, covered by white waxy secretions. Large populations cause branch dieback, gradual desiccation eventually followed by tree death.