Galeruca

Habitats vary by species. G. daurica occurs in grassland ecosystems, particularly arid and semi-arid zones of Inner Mongolia. G. tanaceti inhabits herbaceous vegetation where it oviposits on non-host grasses. G. xanthomelaena has been recorded on urban street trees. Species generally occupy terrestrial environments with host plant availability.

Palaearctic and Nearctic realms. Specific records include: Turkey (10 species), Inner Mongolia and northern China (G. daurica), Mongolia, Russia (Siberia), Korea, Xinjiang and Gansu Province in China (G. daurica), Flushing, Long Island, New York (G. xanthomelaena, historical record), Denmark, Norway (GBIF records).

Varies by species. G. daurica is oligophagous, feeding on Allium mongolicum, A. polyrhizum, and A. ramosum. G. xanthomelaena larvae feed on English elm (Ulmus) leaves, skeletonizing them. G. tanaceti is described as a generalist leaf beetle. G. rufa feeds on Convolvulus arvensis (field bindweed). Host plant specificity ranges from narrow oligophagy to broader generalist feeding.

• Allium mongolicum - primary hostFavorite host of G. daurica
• Allium polyrhizum - hostHost of G. daurica
• Allium ramosum - hostHost of G. daurica
• Ulmus (English elm) - hostHost of G. xanthomelaena larvae
• Convolvulus arvensis - hostHost of G. rufa

G. daurica has one generation per year, overwintering as eggs under the topsoil layer; larvae emerge in April. G. xanthomelaena is double-brooded; eggs laid in clusters along leaf veins, larvae pupate in bark crevices rather than on leaf surfaces. G. tanaceti females deposit egg clutches on non-host plants such as grasses.

G. tanaceti females preferentially oviposit on non-host plants (grasses) rather than host plants, with oviposition site selection influenced by vegetation stem height and density; taller stems and higher stem densities correlate with increased egg clutch presence. G. xanthomelaena larvae exhibit distinctive pupation behavior, crawling down tree trunks to seek bark crevices rather than pupating on leaves. G. daurica shows sex-specific differences in olfactory response, with females playing more important roles in host plant searching.

Herbivores; some species are significant defoliators. G. daurica is a pest with outbreak status causing major economic losses to pasture in Inner Mongolian grasslands since 2009. G. xanthomelaena can severely defoliate ornamental elm trees. G. tanaceti serves as host for specialized egg parasitoid Oomyzus galerucivorus, with vegetation structure mediating this parasitoid-herbivore interaction. G. rufa has been investigated as a potential biological control agent for field bindweed.

Several species are agricultural or ornamental pests requiring management. G. daurica outbreaks in Inner Mongolia necessitate chemical control, with diamide insecticides used and resistance mutations (G4911E in ryanodine receptor) documented. Climate change projections indicate potential northward range shifts and habitat contraction for G. daurica. G. rufa has been evaluated as a biological control agent for field bindweed (Convolvulus arvensis).

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• GALERUCA XANTHOMELAENA, Schrank
• Comparative Transcriptome Analysis of Galeruca daurica Reveals Cold Tolerance Mechanisms
• Functional Characterization of Olfactory Proteins Involved in Chemoreception of Galeruca daurica
• Expression Profiling and Functional Analysis of Candidate Odorant Receptors in Galeruca daurica
• Galeruca rufa [Col.: Chrysomelidae] seasonal life history and the effect of its defoliation on its host plant,Convolvulus arvensis [Convolvulaceae]
• Host Specificity and Biology of Galeruca rufa 1 , a Potential Biological Control Agent for Field Bindweed
• Predicting the Potential Distribution of Galeruca daurica in Inner Mongolia Under Current and Future Climate Scenarios Using the MaxEnt Model
• Predicting the Potential Distribution of <em>Galeruca daurica</em> in Inner Mongolia Under Current and Future Climate Scenarios Using the MaxEnt Model
• MicroRNA miR‐2765‐3p regulates reproductive diapause by targeting FoxO in Galeruca daurica
• Identification of odorant-binding protein genes inGaleruca daurica(Coleoptera: Chrysomelidae) and analysis of their expression profiles
• Effect of vegetation density, height, and connectivity on the oviposition pattern of the leaf beetle Galeruca tanaceti
• Oviposition at low temperatures - late season negatively affects the leaf beetle Galeruca tanaceti (Coleoptera: Galerucinae) but not its specialised egg parasitoid Oomyzus galerucivorus (Hymenoptera: Eulophidae)
• Detection of ryanodine receptor G4911E and I4754M mutation sites and analysis of binding modes of diamide insecticides with RyR on Galeruca daurica (Coleoptera: Chrysomelidae)
• Correction: Functional characterization of olfactory proteins involved in chemoreception of Galeruca daurica.