Picea

Guides

Adelges abietis
Pineapple-gall Adelgid, Eastern Spruce Gall Adelgid, Spruce Gall Aphid
Adelges abietis, commonly known as the pineapple-gall adelgid or eastern spruce gall adelgid, is a conifer-feeding insect that induces distinctive pineapple-shaped pseudocone galls on spruce shoots. The species is one of the most common adelgids in its genus and has been documented across Europe and North America. Unlike the closely related hemlock woolly adelgid (Adelges tsugae), A. abietis is not considered a major destructive pest, though its gall formation causes shoot deformation. The species exhibits strongly aggregated spatial distributions within and among host trees.
adelgid spruce gall-forming forest-pest Picea pineapple-gall Hemiptera Adelgidae
Choristoneura orae
spruce budworm
Choristoneura orae is a small tortricid moth found in North America, commonly known as the spruce budworm. The species has a wingspan of approximately 24 mm. Larvae feed on Picea (spruce) species. It belongs to the genus Choristoneura, which includes several economically important forest pests.
Tortricidae Choristoneura spruce-budworm conifer-pest North-America Picea forest-moth
Cinara costata
Mealy Spruce Aphid
Cinara costata is a large aphid species in the family Aphididae, commonly known as the Mealy Spruce Aphid. It feeds on conifers, particularly spruce (Picea spp.), and is native to Europe where it has been documented in Great Britain, Denmark, Belgium, and France. Like other Cinara species, it produces honeydew that attracts ants and wasps. The species was first described by Zetterstedt in 1828 from specimens collected in Scandinavia.
aphid conifer-pest honeydew-producer Europe spruce Picea Hemiptera Sternorrhyncha Mealy-Spruce-Aphid Christmas-tree-pest Cinara Lachninae conifer-aphid
Cinara pilicornis
spruce shoot aphid, brown spruce shoot aphid
Cinara pilicornis is a large aphid species specialized on spruce trees, particularly Norway spruce (Picea abies) and Sitka spruce (Picea sitchensis). Native to Europe, it has been introduced to New Zealand and South Korea. The species produces melezitose, a trisaccharide sugar, and is associated with specific semiochemicals including nepetalactone compounds. It is attended by ants such as Formica polyctena and serves as a host for Entomophthora fungi, though it experiences low parasitism by the wasp Pauesia pini.
aphid spruce Picea melezitose nepetalactone ant-tended Entomophthora invasive-species Europe New-Zealand South-Korea
Gilpinia
conifer sawflies
Gilpinia is a genus of conifer sawflies in the family Diprionidae, comprising approximately 20 described species distributed across Europe, Asia, and North America. Several species are significant forest pests, notably G. hercyniae (European spruce sawfly) and G. polytoma, which feed on spruce (Picea) species. The genus exhibits complex life history strategies including facultative diapause and variable voltinism (one to three generations annually) depending on geographic location and climate. Species identification relies heavily on morphological examination of the ovipositor, male genitalia, and wing coloration.
sawfly Diprionidae forest-pest conifer defoliator diapause voltinism Picea Pinus
Hylurgops palliatus
Hylurgops palliatus is a bark beetle in the family Curculionidae that colonizes coniferous trees, primarily spruce (Picea) and pine (Pinus) species. It is a secondary bark beetle, meaning it attacks weakened, dying, or recently dead trees rather than healthy ones. The species uses host-specific monoterpene chemical cues to locate and select appropriate host trees. It vectors various fungi, including ophiostomatoid species, which play roles in its ecology and tree colonization.
bark-beetle conifer-pest fungal-vector chemoreception secondary-beetle Picea Pinus Scolytinae Curculionidae Europe North-America monoterpenes ophiostomatoid-fungi
Piceacecis
Piceacecis is a genus of gall midges (Diptera: Cecidomyiidae) described by Gagné in 2014. The genus is associated with spruce trees (genus Picea), as indicated by its etymology. As a recently described genus within the diverse gall midge family, its species are likely specialized in inducing galls on spruce foliage or shoots. The genus has been recorded from Denmark.
Cecidomyiidae gall-midges Picea spruce 2014 Denmark gall-inducers
Pineus similis
Ragged Spruce Gall Adelgid
Pineus similis is a gall-forming adelgid that induces galls on spruce trees (Picea spp.). Originally described as Chermes similis by Gillette in 1907 from blue spruce in Colorado, it was later transferred to genus Pineus by Annand. The species produces winged females that emerge from galls and settle on spruce hosts, with documented preference for white spruce. Wingless females bearing egg clusters occur within galls. It has been recorded on multiple spruce species across North America and has doubtful or rare records in Europe.
adelgid gall-former spruce-pest phylloxerid conifer-specialist Hemiptera Sternorrhyncha North-America Europe Picea
Pleroneura
Pleroneura is a genus of sawflies in the family Xyelidae whose larvae are bud miners and shoot borers of fir (Abies) and spruce (Picea) species. Larvae feed within developing buds and shoots of conifers, with multiple species sometimes co-occurring on the same host tree. The genus occurs primarily in North America and Asia, with documented species attacking white fir in California, balsam fir in eastern North America, and Sakhalin spruce in Japan. Species-level taxonomy remains problematic, with recognition not currently based on fundamental characters.
Xyelidae sawfly bud-miner conifer-pest Abies Picea Symphyta Hymenoptera
Tetranychinae
Tetranychinae is a subfamily of spider mites (Tetranychidae) containing economically significant agricultural and ornamental crop pests. The subfamily includes the genera Tetranychus, Eutetranychus, Oligonychus, Panonychus, Amphitetranychus, Schizotetranychus, Aponychus, Paraponychus, and Stylophoronychus. Species within this subfamily are phytophagous and pose serious threats to crop yield and quality. Identification relies primarily on morphological examination of adult male genitalia, though molecular and biochemical methods are increasingly employed for accurate species discrimination.
spider-mites agricultural-pests phytophagous-mites crop-pests invasive-species acarology integrated-pest-management molecular-identification DNA-barcoding Turkey Russia Paleotropical Neotropical North-America Malus Prunus Quercus Picea Abies rosaceous-plants coniferous-plants monocotyledons dicotyledons acaricide-resistance quarantine-pests diapause male-genitalia aedeagus PCR-RFLP real-time-PCR LAMP MALDI-TOF-MS allozyme-analysis species-discrimination reproductive-isolation Tetranychus Eutetranychus Oligonychus Panonychus Amphitetranychus Schizotetranychus Aponychus Paraponychus Stylophoronychus Eotetranychus Bryobia Prostigmata Acari Arachnida Arthropoda Animalia
Tetropium parvulum
Northern Spruce Borer
Tetropium parvulum, the northern spruce borer, is a small cerambycid beetle specialized on spruce hosts. It was elevated from synonymy with T. cinnamopterum based on distinct morphological differences in larvae and adults, and exhibits strict host specificity to Picea compared to the conifer generalist T. cinnamopterum. The species has a one-year life cycle and is an economically important borer of white and Engelmann spruce logs in western Canada.
Cerambycidae spruce-borer wood-boring-beetle forest-pest western-Canada conifer-specialist Tetropium Picea economic-pest one-year-life-cycle Tetropium-parvulum Northern-Spruce-Borer Tetropium-cinnamopterum-complex morphological-diagnosis strict-host-specificity Tetropium-alaskanum-synonym Rhimphoctona-alaskensis-parasitoid spruce-log-pest Alberta-forestry boreal-forest-insect phloem-feeder cambium-borer L-shaped-galleries early-summer-emergence woodpecker-predation disease-mortality excess-heat-mortality Tetropium-velutinum-comparison lectotype-designation Tetropium-parallelum Tetropium-schwarzianum coniferous-forest-decomposer primary-borer Tetropium-taxonomy Casey-1891 Canadian-Entomologist economic-entomology forest-health timber-pest spruce-regeneration Picea-glauca-pest Picea-engelmannii-pest western-Canadian-distribution North-American-Cerambycidae Tetropium-morphology larval-urogomphi adult-genitalia pronotal-punctation eye-morphology scutellum-structure host-preference-divergence conifer-specialist-vs-generalist sympatric-species species-elevation-from-synonymy type-specimen-examination diagnostic-key forest-insect-natural-enemies insect-disease-mortality parasitoid-wasp woodpecker-insectivory thermal-mortality gallery-depth overwintering-biology spring-pupation September-larval-maturity one-year-univoltine spruce-logging-impact forest-management integrated-pest-management boreal-forest-ecology subcortical-insect phloeophagous-beetle xylophagous-larvae wood-degradation nutrient-cycling forest-succession disturbance-ecology fire-killed-spruce windthrow-spruce salvage-logging-insect standing-dead-timber spruce-beetle-complex Scolytinae-competitor Cerambycidae-community coniferous-wood-borer-guild North-American-forest-insects western-Canadian-entomology Alberta-entomology British-Columbia-entomology Manitoba-entomology Labrador-entomology transcontinental-distribution boreal-forest-biodiversity spruce-ecosystem-engineer 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compartmentalization CODIT-model decay-column heartwood-rot sapwood-stain structural-integrity-loss windthrow-risk stand-dynamics successional-trajectory forest-regeneration plantation-forestry silvicultural-practice thinning pruning fertilization site-preparation genetic-improvement resistance-breeding clonal-forestry seed-orchard provenance-trial common-garden quantitative-genetics heritability selection-differential response-to-selection genetic-gain deployment-strategy risk-spreading portfolio-effect climate-smart-forestry adaptive-silviculture resilience-management transformational-adaptation ecosystem-based-management sustainable-forest-management certification-standard FSC PEFC SFI forest-health-monitoring aerial-survey ground-survey remote-sensing satellite-imagery hyperspectral-imaging LiDAR drone-survey machine-learning species-distribution-model habitat-suitability climate-envelope bioclimatic-variable future-projection emission-scenario RCP SSP uncertainty-quantification 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biotic-interaction competition facilitation apparent-competition indirect-effect network-ecology food-web-topology trophic-level energy-flow biomass-pyramid productivity ecosystem-function ecosystem-service-valuation natural-capital green-accounting sustainable-development-goal Aichi-target Kunming-Montreal-framework 30x30-target protected-area OECM conservation-effectiveness management-effectiveness governance indigenous-knowledge local-knowledge citizen-science iNaturalist community-monitoring participatory-research knowledge-co-production transdisciplinary-research science-policy-interface IPBES IPCC FAO ITTO IUFRO CABI CFS USDA USFS NRCan provincial-forestry industrial-forestry smallholder-forestry community-forestry urban-forestry agroforestry social-forestry forest-restoration reforestation afforestation natural-regeneration assisted-natural-regeneration enrichment-planting direct-seeding nursery-practice seedling-quality outplanting-survival competition-control vegetation-management herbicide mechanical-site-preparation prescribed-fire wildfire fire-management fire-ecology pyrodiversity serotiny seed-bank post-fire-regeneration salvage-logging sanitation-cutting insecticide fumigant contact-insecticide systemic-insecticide insect-growth-regulator chitin-synthesis-inhibitor juvenile-hormone-analog ecdysone-agonist semiochemical aggregation-pheromone anti-aggregation-pheromone sex-pheromone kairomone allomone synomone push-pull-strategy mating-disruption mass-trapping attract-and-kill sterile-insect-technique incompatible-insect-technique gene-drive RNA-interference precision-pest-management site-specific-management variable-rate-application unmanned-aerial-vehicle precision-forestry digital-forestry smart-forestry Industry-4.0 Internet-of-Things sensor-network real-time-monitoring big-data artificial-intelligence deep-learning computer-vision automated-identification taxonomic-impediment taxonomic-capacity parataxonomist DNA-taxonomy metabarcoding environmental-DNA biosurveillance biosecurity One-Health planetary-health ecohealth sustainability-science resilience-science complexity-science systems-thinking adaptive-management learning-organization knowledge-management institutional-memory capacity-building education extension outreach science-communication public-engagement media-relations social-media open-access data-sharing FAIR-principles reproducible-research open-science research-integrity research-ethics animal-welfare 3Rs wildlife-research-ethics indigenous-data-sovereignty benefit-sharing access-and-benefit-sharing Nagoya-Protocol Convention-on-Biological-Diversity CITES IUCN Red-List-assessment conservation-status population-trend threat-assessment climate-change-vulnerability adaptive-capacity evolutionary-potential extinction-risk minimum-viable-population effective-conservation systematic-conservation-planning prioritization gap-analysis representativeness complementarity irreplaceability vulnerability connectivity corridor stepping-stone habitat-network landscape-matrix permeability resistance-surface least-cost-path circuit-theory isolation-by-distance isolation-by-resistance population-genetics landscape-genetics seascape-genetics riverscape-genetics conservation-genomics population-genomics landscape-genomics environmental-association genotype-environment-association outlier-detection selective-sweep genomic-offset genomic-vulnerability genetic-rescue genetic-restoration genetic-management pedigree-analysis parentage-analysis relatedness-inference kinship inbreeding-coefficient effective-migration-rate divergence-time coalescent-theory approximate-Bayesian-computation machine-learning-genomics deep-learning-genomics structural-variant copy-number-variant single-nucleotide-polymorphism microsatellite mitochondrial-DNA chloroplast-DNA whole-genome-sequencing transcriptomics proteomics metabolomics phenomics remote-phenotyping high-throughput-phenotyping phenotyping-platform field-phenomics precision-phenotyping image-based-phenotyping spectral-phenotyping thermal-phenotyping 3D-phenotyping laser-scanning photogrammetry structure-from-motion multi-view-stereo digital-elevation-model canopy-height-model individual-tree-detection crown-delineation biomass-estimation volume-estimation growth-modeling process-based-model empirical-model hybrid-model model-calibration uncertainty-analysis sensitivity-analysis ensemble-forecast scenario-analysis decision-analysis risk-analysis cost-benefit-analysis multi-criteria-analysis stakeholder-analysis social-network-analysis institutional-analysis policy-analysis governance-analysis political-ecology environmental-justice environmental-equity distributional-equity procedural-equity recognition-equity intergenerational-equity intragenerational-equity sustainability-transition just-transition green-economy circular-economy bioeconomy nature-based-solution ecosystem-based-adaptation ecosystem-based-mitigation 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Tragosoma
Tragosoma is a genus of large saproxylic longhorn beetles in the subfamily Prioninae, distributed across the Holarctic region. The genus includes approximately six described species, with Tragosoma depsarium being the most widely studied and the type species. These beetles are obligate deadwood specialists whose larvae develop in the sapwood of conifers, particularly pines. Adults are notable for their robust, somewhat flattened bodies and relatively short antennae compared to other cerambycids. Several species are of conservation concern due to their dependence on specific deadwood microhabitats threatened by modern forestry practices.
Cerambycidae Prioninae Meroscelisini saproxylic coniferous-forest deadwood conservation Holarctic boreal-forest alpine-forest microclimate old-growth-indicator threatened-species wood-boring-beetle Pinus Picea