Ornamental-foliage-pest
Guides
Ctenarytaina eucalypti
Bluegum psyllid, Eucalyptus psyllid
Ctenarytaina eucalypti is a small psyllid (jumping plant louse) native to Australia that has become an invasive pest of Eucalyptus trees worldwide. It feeds on phloem sap, causing damage to young foliage and producing honeydew that promotes sooty mold growth. The species has established populations in Europe, North America, South America, and elsewhere, often threatening ornamental and commercial Eucalyptus plantations. Its life cycle includes multiple overlapping generations per year with complex overwintering strategies involving eggs and nymphs in temperate climates.