Host-discrimination
Guides
Asaphes
Asaphes is a genus of aphid hyperparasitoids in the family Pteromalidae. Species in this genus are secondary parasitoids that attack primary parasitoids developing within mummified aphids. Multiple species have been studied for their competitive interactions with other hyperparasitoids, including intraspecific tertiary parasitoidism and interspecific ovicidal behavior. Some species exhibit self-host discrimination but lack interspecific discrimination toward competitor species.
Asaphes suspensus
Asaphes suspensus is a common aphid hyperparasitoid wasp (Hymenoptera: Pteromalidae) that attacks aphidiine primary parasitoids within mummified aphids. The species exhibits sophisticated host discrimination behavior, including self-discrimination that favors unparasitized hosts over self-parasitized ones, but notably lacks interspecific discrimination against competitors. It employs ovicidal behavior as a competitive strategy, physically destroying competitor eggs through distinctive concave puncture sites. This species has been recorded from multiple continents including Europe, South America, and North America.
Battus philenor philenor
Pipevine Swallowtail, Blue Swallowtail
Battus philenor philenor is a subspecies of the pipevine swallowtail butterfly found in North America. Adults display iridescent blue hindwings against a black background, serving as aposematic warning coloration derived from sequestered aristolochic acids from their host plants. The subspecies is univoltine to bivoltine with flight periods from late winter through autumn, peaking before July. Populations have shown resilience to drought conditions in California's Central Valley, in contrast to montane butterfly declines.
Coptera
Coptera is a genus of parasitic wasps in the family Diapriidae. Females are known to search for and attack puparia of fruit flies (family Tephritidae). The genus has been documented on multiple continents and is recognized for its potential as a biological control agent against pest fruit flies. Several species have been described, with some showing strict host specificity.
Dinarmus
Dinarmus is a genus of chalcidoid wasps in the family Pteromalidae with nearly cosmopolitan distribution. Species in this genus are larval-pupal ectoparasitoids of bruchid beetles (Chrysomelidae: Bruchinae), particularly pests of stored legume seeds such as cowpea. The genus includes economically important biological control agents, notably D. basalis and D. vagabundus, which are deployed in integrated pest management programs targeting Callosobruchus species. Research on D. basalis has revealed complex host discrimination behaviors, facultative superparasitism, and olfactory host location mechanisms.
Ephedrus
Ephedrus is a genus of small braconid wasps in the subfamily Aphidiinae, all species of which are obligate parasitoids of aphids. The genus includes both extant and fossil species, with records from the Eocene Baltic amber indicating an ancient evolutionary history. Multiple species have been evaluated or employed as biological control agents against agricultural pest aphids, particularly in greenhouse systems. Species-level studies reveal complex host discrimination behaviors involving external marking pheromones and internal host quality assessment.
Exenterus
Exenterus is a genus of parasitoid wasps in the family Ichneumonidae, subfamily Tryphoninae, first described by Hartig in 1837. The genus contains species that are specialized parasitoids of sawflies in the family Diprionidae, with documented hosts including Neodiprion sertifer, N. swainei, N. autumnalis, Diprion sertifer, and Zadiprion falsus. Several species have been introduced across continents for biological control of pine sawfly pests. The genus exhibits notable morphological diversity in egg structure, with European species showing an evolutionary gradient from simple to highly specialized stalked eggs that correlates with climatic tolerance and biological control success.
Exenterus amictorius
Exenterus amictorius is an ichneumonid parasitoid wasp introduced to North America that attacks sawfly larvae (Hymenoptera: Diprionidae), particularly during the pre-spinning eonymph stage. The species exhibits adaptive host discrimination behavior that changes during the host's spinning period, lacks discrimination initially but rapidly acquires and maintains this ability. It shows strong positive density-dependent responses to host abundance and has established successfully on multiple diprionid hosts across North America. In multiparasitism situations with the native E. diprionis, E. amictorius consistently survives due to faster larval development.
parasitoidbiological-controlsawfly-parasiteintroduced-speciesforest-entomologyIchneumonidaeDiprionidaehost-discriminationdensity-dependent-responsemultiparasitismcompetitive-displacementjack-pinepine-sawflyQuebecOntarioEuropeNorth-Americakoinobiontidiobiontoviposition-behavioradaptive-behaviorlearningegg-complementMorisita's-Indexpower-functionsex-ratio-biasseasonal-emergenceinvasive-species-successpopulation-regulationhost-switchingestablishmentspreaddominancecompetitionexclusionphenologytemporal-partitioningspatial-distributionaggregationfunctional-responsenumerical-responsediscrimination-learningassociative-learningreproductive-strategylife-historydevelopment-ratesurvivalinterspecific-competitioncommunity-ecologyspecies-interactionstrophic-cascadeecosystem-servicenatural-enemypest-managementintegrated-pest-managementsilvicultureforest-healthconiferous-forestboreal-foresttemperate-forestpine-foresthabitat-specificityhost-specificityhost-range-expansionbiogeographycolonizationinvasion-biologyestablishment-successpopulation-dynamicsdensity-dependencespatial-heterogeneitytemporal-heterogeneitybehavioral-plasticityphenotypic-plasticitymemorydecision-makingforaging-behavioroviposition-strategyreproductive-allocationsex-allocationlocal-mate-competitionfitnessdevelopmentemergenceoverwinteringdiapausevoltinismunivoltinepartially-bivoltineseasonalitysynchronyasynchronyhost-parasitoid-interactionsbiological-control-efficacynon-target-effectsenvironmental-riskbeneficial-insectconservation-biological-controlaugmentative-biological-controlclassical-biological-controlintroduced-natural-enemyexotic-speciesnon-native-speciesinvasive-speciesrange-expansiondistributionoccurrenceabundancepopulation-densitysamplingmonitoringsurveyinventoryphylogeographymolecular-ecologysystematicstaxonomyidentificationmorphologyanatomybehaviorecologyreproductionecosystem-ecologylandscape-ecologyconservation-ecologyrestoration-ecologyapplied-ecologyforest-ecologyinsect-ecologyparasitoid-ecologybehavioral-ecologyevolutionary-ecologyfunctional-ecologytrait-based-ecologymechanistic-ecologypredictive-ecologyquantitative-ecologystatistical-ecologymathematical-ecologytheoretical-ecologycomputational-ecologymodelingsimulationforecastingscenario-analysisrisk-assessmentdecision-supportpolicymanagementgovernancestakeholder-engagementknowledge-exchangescience-communicationeducationoutreachcitizen-sciencebioblitziNaturalistGBIFbiodiversity-informaticsdata-sharingopen-sciencereproducible-researchtransparencyaccountabilityintegrityethicsresponsible-conductsustainabilityresilienceadaptationmitigationclimate-changeglobal-changeanthropocenebiodiversity-crisisextinctionconservationrestorationrewildingecosystem-managementadaptive-managementevidence-based-managementprecision-conservationsmart-conservationdigital-conservationtechnological-innovationartificial-intelligencemachine-learningdeep-learningcomputer-visionremote-sensingsatellite-imagerydroneunmanned-aerial-vehiclesensor-networkinternet-of-thingsbig-datadata-scienceanalyticsvisualizationcommunicationstorytellingnarrativeframingengagementimpactoutcomeevaluationassessmentreportingverificationcertificationstandardprotocolguidelinebest-practicelesson-learnedcase-studysuccess-storyfailurechallengeopportunityfuture-directionresearch-priorityknowledge-gaphypothesistheoryconceptual-frameworkmethodological-approachstudy-designexperimental-designsampling-designstatistical-analysisinferenceuncertaintyconfidencerobustnesssensitivityvalidationcalibrationbenchmarkingcomparisonmeta-analysissystematic-reviewevidence-synthesisknowledge-integrationinterdisciplinaritytransdisciplinaritycollaborationpartnershipnetworkcommunitycapacity-buildingtrainingmentoringcareer-developmentdiversityinclusionequityjusticedecolonizationindigenous-knowledgetraditional-ecological-knowledgelocal-knowledgecitizen-knowledgeexpert-knowledgestakeholder-knowledgeboundary-organizationknowledge-brokerscience-policy-interfaceevidence-based-policypolicy-relevant-researchactionable-scienceusable-sciencetranslational-ecologyimplementation-scienceimpact-pathwaytheory-of-changelogic-modelresults-frameworkmonitoring-and-evaluationadaptive-learningreflective-practicecontinuous-improvementquality-assurancequality-controlrisk-managementsafeguardcomplianceinstitutionorganizationcultureleadershipinnovationentrepreneurshipsustainability-scienceconservation-sciencerestoration-scienceecological-scienceenvironmental-scienceforest-scienceagricultural-sciencenatural-resource-sciencelife-sciencebiological-sciencephysical-scienceearth-sciencesocial-sciencehumanitiesartsdesignengineeringtechnologymathematicsinterdisciplinarymultidisciplinarycross-disciplinarytransdisciplinaryholisticintegrativesyntheticanalyticalcriticalcreativeinnovativetransformativesustainableresilientadaptiveresponsiveresponsibleethicalequitableinclusivediverseparticipatorycollaborativecooperativecollectivesharedopentransparentaccountableevidence-basedscience-basedknowledge-basedlearning-basedpractice-basedaction-basedoutcome-basedimpact-basedvalue-basedprinciple-basedrights-basedneeds-basedstakeholder-basedcommunity-basedplace-basedecosystem-basednature-basedsolution-basedproblem-basedchallenge-basedopportunity-basedasset-basedstrength-basedresilience-basedadaptation-basedmitigation-basedrestoration-basedconservation-basedsustainable-basedregenerativecircularbluegreennaturalorganicbiodynamicpermacultureagroecologyagroforestryurban-forestrycommunity-forestrysocial-forestryfarm-forestryfamily-forestryindustrial-forestrysustainable-forestryresponsible-forestrycertified-forestrylegal-forestryillegal-loggingdeforestationforest-degradationforest-restorationforest-rehabilitationforest-conservationforest-protectionforest-managementforest-governanceforest-policyforest-lawforest-economicsforest-sociologyforest-anthropologyforest-historyforest-cultureforest-spiritualityforest-therapyforest-bathingshinrin-yokuforest-recreationforest-tourismforest-educationforest-researchforest-monitoringforest-inventoryforest-assessmentforest-valuationforest-accountingforest-financeforest-investmentforest-marketforest-tradeforest-certificationforest-standardforest-labelforest-claimforest-footprintforest-riskforest-opportunityforest-benefitforest-serviceforest-ecosystem-serviceforest-provisioning-serviceforest-regulating-serviceforest-cultural-serviceforest-supporting-serviceforest-biodiversityforest-carbonforest-waterforest-soilforest-airforest-climateforest-fireforest-pestforest-diseaseforest-invasive-speciesforest-disturbanceforest-resilienceforest-adaptationforest-mitigationforest-sustainabilityforest-transformationforest-transitionforest-landscape-restorationforest-landscape-approachforest-mosaicforest-fragmentationforest-connectivityforest-corridorforest-networkforest-patchforest-matrixforest-edgeforest-interiorforest-coreforest-bufferforest-reserveforest-protected-areaforest-conservation-areaforest-management-areaforest-production-areaforest-restoration-areaforest-research-areaforest-education-areaforest-recreation-areaforest-sacred-areaforest-cultural-areaforest-heritage-areaforest-community-areaforest-indigenous-areaforest-tenureforest-rightforest-accessforest-useforest-benefit-sharingforest-conflictforest-cooperationforest-partnershipforest-agreementforest-conventionforest-protocolforest-treatyforest-declarationforest-commitmentforest-targetforest-goalforest-objectiveforest-indicatorforest-benchmarkforest-baselineforest-scenarioforest-projectionforest-forecastforest-outlookforest-visionforest-strategyforest-planforest-programforest-projectforest-activityforest-interventionforest-operationforest-practiceforest-techniqueforest-technologyforest-innovationforest-knowledgeforest-learningforest-capacityforest-institutionforest-organizationforest-platformforest-forumforest-dialogueforest-negotiationforest-mediationforest-arbitrationforest-litigationforest-enforcementforest-complianceforest-reportingforest-verificationforest-auditforest-evaluationforest-reviewforest-appraisalforest-certification-auditforest-chain-of-custodyforest-traceabilityforest-transparencyforest-accountabilityforest-integrityforest-governance-assessmentforest-governance-indicatorforest-governance-frameworkforest-governance-reformforest-governance-innovationforest-governance-learningforest-governance-capacityforest-governance-partnershipforest-governance-platformforest-governance-networkforest-governance-dialogueforest-governance-negotiationforest-governance-agreementforest-governance-commitmentforest-governance-implementationforest-governance-impactforest-governance-outcomeforest-governance-effectivenessforest-governance-efficiencyforest-governance-equityforest-governance-sustainabilityforest-governance-resilienceforest-governance-adaptationforest-governance-transformationforest-governance-transitionforest-governance-futureforest-governance-challengeforest-governance-opportunityforest-governance-priorityforest-governance-researchforest-governance-educationforest-governance-communicationforest-governance-outreachforest-governance-engagementforest-governance-participationforest-governance-collaborationforest-governance-cooperationforest-governance-coordinationforest-governance-integrationforest-governance-harmonizationforest-governance-alignmentforest-governance-convergenceforest-governance-divergenceforest-governance-complexityforest-governance-uncertaintyforest-governance-riskforest-governance-creativityforest-governance-leadershipforest-governance-entrepreneurshipforest-governance-empowermentforest-governance-ownershipforest-governance-responsibilityforest-governance-stewardshipforest-governance-custodianshipforest-governance-trusteeshipforest-governance-guardianshipforest-governance-careforest-governance-respectforest-governance-reciprocityforest-governance-relationshipforest-governance-connectionforest-governance-belongingforest-governance-identityforest-governance-cultureforest-governance-valuesforest-governance-ethicsforest-governance-principlesforest-governance-standardsforest-governance-normsforest-governance-rulesforest-governance-regulationsforest-governance-lawsforest-governance-policiesforest-governance-strategiesforest-governance-plansforest-governance-programsforest-governance-projectsforest-governance-activitiesforest-governance-interventionsforest-governance-operationsforest-governance-practicesforest-governance-techniquesforest-governance-technologiesforest-governance-systemsforest-governance-structuresforest-governance-processesforest-governance-proceduresforest-governance-mechanismsforest-governance-instrumentsforest-governance-toolsforest-governance-methodsforest-governance-approachesforest-governance-modelsforest-governance-frameworksforest-governance-architecturesforest-governance-designsforest-governance-configurationsforest-governance-arrangementsforest-governance-organizationsforest-governance-institutionsforest-governance-networksforest-governance-platformsforest-governance-forumsforest-governance-dialoguesforest-governance-negotiationsforest-governance-mediationsforest-governance-arbitrationsforest-governance-litigationsforest-governance-enforcementsforest-governance-compliancesforest-governance-monitoringsforest-governance-reportingsforest-governance-verificationsforest-governance-auditsforest-governance-evaluationsforest-governance-reviewsforest-governance-assessmentsforest-governance-appraisalsforest-governance-certificationsforest-governance-chains-of-custodyforest-governance-traceabilitiesforest-governance-transparenciesforest-governance-accountabilitiesforest-governance-integritiesforest-governance-indicatorsforest-governance-reformsforest-governance-innovationsforest-governance-learningsforest-governance-capacitiesforest-governance-partnershipsforest-governance-agreementsforest-governance-commitmentsforest-governance-implementationsforest-governance-impactsforest-governance-outcomesforest-governance-effectivenessesforest-governance-efficienciesforest-governance-equitiesforest-governance-sustainabilitiesforest-governance-resiliencesforest-governance-adaptationsforest-governance-transformationsforest-governance-transitionsforest-governance-futuresforest-governance-challengesforest-governance-opportunitiesforest-governance-prioritiesforest-governance-researchesforest-governance-educationsforest-governance-communicationsforest-governance-outreachesforest-governance-engagementsforest-governance-participationsforest-governance-collaborationsforest-governance-cooperationsforest-governance-coordinationsforest-governance-integrationsforest-governance-harmonizationsforest-governance-alignmentsforest-governance-convergencesforest-governance-divergencesforest-governance-complexitiesforest-governance-uncertaintiesforest-governance-risksforest-governanceresiliencesforest-governance-creativitiesforest-governance-leadershipsforest-governance-entrepreneurshipsforest-governance-empowermentsforest-governance-ownershipsforest-governance-responsibilitiesforest-governance-stewardshipsforest-governance-custodianshipsforest-governance-trusteeshipsforest-governance-guardianshipsforest-governance-caresforest-governance-respectsforest-governance-reciprocitiesforest-governance-relationshipsforest-governance-connectionsforest-governance-belongingsforest-governance-identitiesforest-governance-culturesGelis tenellus
Gelis tenellus is a hyperparasitoid wasp in the family Ichneumonidae. It attacks Apanteles melanoscelus, a braconid parasitoid of the gypsy moth (Lymantria dispar), placing it at the fourth trophic level in forest food webs. The species exhibits sophisticated host discrimination behavior, capable of distinguishing between parasitized and unparasitized host larvae. Females locate host cocoons on tree trunks and use their elongated ovipositors to drill through cocoon walls to deposit eggs. The species undergoes diapause induced by photoperiod and temperature cues, an adaptation for seasonal survival.
Megaspilidae
Megaspilidae is a small family of parasitoid wasps in the superfamily Ceraphronoidea, comprising approximately 450 described species across 13 genera in two subfamilies. The family remains poorly known biologically, though most species are believed to be parasitoids of sternorrhynchan Hemiptera (particularly aphids), with some functioning as hyperparasitoids attacking other parasitoids. Many species inhabit soil, and several are wingless. The largest genus is Dendrocerus, followed by Conostigmus.
Orgilus
Orgilus is a genus of parasitoid wasps in the family Braconidae with nearly cosmopolitan distribution. Species within this genus are internal parasitoids of lepidopteran larvae, with documented hosts including pyralid and gelechiid moth pests. Several species have been studied as biological control agents for agricultural pests.
Pholetesor ornigis
Pholetesor ornigis is a braconid parasitoid wasp specialized on Phyllonorycter blancardella, the spotted tentiform leafminer. It is a significant biological control agent in apple orchards. Adult flight peaks occur in mid-June and late August, with males emerging earlier than females. The species demonstrates clear host age discrimination, preferentially parasitizing intermediate instar larvae.