Glycaspis

Glycaspis species are psyllids that can be distinguished from related genera by their association with lerps—protective sugary coverings produced by nymphs. Adults are small hemipterans with typical psyllid morphology. Species-level identification often requires advanced techniques due to the presence of sibling species complexes. Glycaspis brimblecombei specifically produces distinctive conical lerps on eucalyptus leaves. Separation from other psyllid genera such as Acizzia relies on morphological characters and host association patterns.

Native to Australia, where species occupy diverse eucalyptus-dominated ecosystems. In invaded regions, Glycaspis brimblecombei occurs in eucalyptus plantations and urban plantings of Eucalyptus species. Population density is influenced by climatic factors, with drought conditions favoring growth and rainfall reducing populations by removing protective nymphal lerps.

Native to Australia (New South Wales, Northern Territory, Queensland, South Australia, Western Australia). Glycaspis brimblecombei has been introduced and established across multiple continents: North America (USA: Arizona, California, Florida, Hawaii; Mexico), South America (Brazil, Chile, Colombia, Ecuador, Peru, Venezuela, Argentina), Europe (France, Spain, Portugal, Italy, Greece, Albania, Croatia, Cyprus, Malta, Montenegro, Turkey), Africa (Algeria, Ethiopia, Kenya, Madagascar, Malawi, Mauritius, Morocco, Reunion, Rwanda, South Africa, Tanzania, Tunisia, Uganda, Zambia, Zimbabwe), Asia (Israel, Syria, Turkey), and Oceania (New Zealand).

Phloem-feeding specialists on Eucalyptus species. Glycaspis brimblecombei feeds on several Eucalyptus species including E. camaldulensis and related taxa. Nymphs and adults both feed on host plant sap.

• Eucalyptus - hostPrimary host genus; most Glycaspis species show high host specificity to single or closely related Eucalyptus species
• Eucalyptus camaldulensis - hostKey host for Glycaspis brimblecombei

Multivoltine, with multiple generations per year. Development includes egg, nymphal (with lerps), and adult stages. Nymphs produce protective sugary lerps that cover their bodies during development. The specific duration of life stages varies with environmental conditions.

Nymphs remain sessile under protective lerps while feeding. Adults are mobile and disperse to find new host plants. Heavy infestations can cause leaf damage, honeydew secretion, and sooty mold growth on host plants.

Herbivore and plant parasite on eucalypts. Serves as prey for various natural enemies including parasitoids (Psyllaephagus bliteus), predatory lacewings (Chrysoperla externa, Ceraeochrysa cubana), coccinellid beetles (Olla v-nigrum, Jaguarita conjugata), and entomopathogenic fungi (Beauveria bassiana, Metarhizium anisopliae, Cordyceps species). Some Glycaspis species may contribute to short-range endemism patterns in Australian psyllid fauna.

Glycaspis brimblecombei is a major economic pest in eucalyptus forestry, particularly in Brazil and other regions where eucalyptus plantations are important. It reduces tree growth and wood production; similar pests can reduce yields by up to 20%. Management relies on integrated pest management combining biological control, monitoring, and selection of resistant plant material. The sugary lerps produced by nymphs are technically edible but difficult to harvest. No direct medical or agricultural significance for other Glycaspis species.

• AcizziaBoth are psyllid genera associated with Australian Myrtaceae; Acizzia primarily occurs on Acacia rather than Eucalyptus, and shows different host specificity patterns
• PsyllaBoth are psyllid genera with plant-parasitic lifestyles; Psylla species typically occur on different host plant families and lack the distinctive lerp biology of many Glycaspis species

• psyllid
• lerp
• eucalyptus
• pest
• invasive
• Australia
• forestry
• hemiptera
• Sternorrhyncha
• phloem-feeder
• multivoltine
• biological control
• host specificity
• short-range endemism

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
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• Glycaspis brimblecombei . [Distribution map].
• Glycaspis brimblecombei . [Distribution map].
• Glycaspis brimblecombei . [Distribution map].
• Predation by Coccinellidae on Glycaspis brimblecombei (Hemiptera: Aphalaridae) eggs
• FURTHER INFORMATION ON GLYCASPIS SPECIES (HOMOPTERA: PSYLLIDAE) ASSOCIATED WITH EUCALYPTUS CAMALDULENSIS, AND ON OTHER GLYCASPIS SPECIES
• GLYCASPIS BRIMBLECOMBEI (HEMIPTERA: APHALARIDAE) IN EUCALYPTUS FOREST PLANTATIONS: A REVIEW
• Patterns of host preference of the invasiveGlycaspis brimblecombeiMoore (Hemiptera: Psyllidae) 
• Intraguild interactions between generalist predators and an introduced parasitoid of Glycaspis brimblecombei (Homoptera: Psylloidea)
• Wolbachia pipientis: first detection in populations of Glycaspis brimblecombei (Hemiptera: Aphalaridae) and Psyllaephagus bliteus (Hymenoptera: Encyrtidae) in Brazil
• The biology and occurrence of Glycaspis baileyi Moore in New South Wales.
• Short-range endemism and Australian Psylloidea (Insecta : Hemiptera) in the genera Glycaspis and Acizzia (Psyllidae)
• A NEW SPECIES OF GLYCASPIS (HOMOPTERA: PSYLLIDAE) AND ADDITIONAL INFORMATION ON HOST ASSOCIATIONS
• Isolation and molecular characterization of Cordyceps sp. from Bemisia tabaci (Hemiptera: Aleyrodidae) and pathogenic to Glycaspis brimblecombei (Hemiptera: Aphalaridae)
• Potential of lacewings (Neuroptera: Chrysopidae) as predators of the red gum lerp psyllid Glycaspis brimblecombei (Hemiptera: Aphalaridae) in Eucalyptus
• A SIBLING NEW SPECIES OF GLYCASPIS TAYLOR (HOMOPTERA: PSYLLIDAE) AND REINSTATEMENT OF THREE SYNONYMS