Biological-control
Guides
Aphelopus albopictus
A parasitoid wasp in the family Dryinidae studied primarily in grape vineyards for its role as a biological control agent of leafhopper pests. Research has focused on its abundance, parasitism rates, and spatial distribution relative to leafhopper host populations in agricultural settings.
Aphelopus varicornis
Aphelopus varicornis is a species of dryinid wasp in the family Dryinidae, a group of parasitoid wasps known for attacking leafhoppers and planthoppers. The genus Aphelopus is characterized by females possessing raptorial forelegs adapted for capturing hosts. This species belongs to a family widely used in biological control programs targeting agricultural pest leafhoppers.
Aphidecta
larch ladybird, larch ladybug
Aphidecta is a genus of Coccinellidae (ladybird beetles) containing at least one well-documented species, A. obliterata, commonly known as the larch ladybird. Members are specialized predators of conifer-infesting adelgids and aphids. The genus has been the subject of biological control research, particularly for management of balsam woolly aphid.
Aphidecta obliterata
larch ladybird, larch ladybug, Larch Lady Beetle
Aphidecta obliterata is a small ladybird beetle (3.5–5 mm) native to Europe, with introduced populations in North America. It is a specialized predator of conifer-infesting aphids and adelgids, particularly associated with spruce and larch. The species exhibits remarkable color polymorphism, ranging from tan to brown with pinkish tints to nearly black. Multiple unsuccessful attempts were made to introduce it to eastern Canada as a biological control agent for the balsam woolly aphid (Adelges piceae) beginning in 1941. Females demonstrate sophisticated oviposition behavior, using conspecific larval tracks and egg-surface chemicals to avoid sites with high cannibalism risk.
Aphidiinae
Aphid Mummy Wasps
Aphidiinae is a subfamily of Braconidae comprising approximately 400 species in 50 genera worldwide. These wasps are koinobiont endoparasitoids that develop exclusively within aphid hosts, with larvae consuming the host from the inside. Most species pupate inside the dead aphid, though members of the tribe Praini exit below to form external volcano-like cocoons. The group is economically significant for biological control of aphid pests in agriculture and horticulture.
Aphidiinae
Aphid Mummy Wasps
Aphidiinae is a subfamily of tiny parasitoid wasps within Braconidae that exclusively parasitize aphids. Adults are minute, typically under 5 mm, with reduced wing venation characteristic of microgastroid wasps. The common name 'Aphid Mummy Wasps' refers to the distinctive 'mummy' formed when parasitized aphids die, dry out, and become leathery brown or black shells containing the wasp pupa. Several species have been successfully deployed in biological control programs targeting agricultural aphid pests.
Aphidiini
Aphidiini is a tribe of parasitoid wasps within Braconidae (Hymenoptera) that specialize in attacking aphids (Hemiptera: Aphididae). Members of this tribe are koinobiont endoparasitoids, developing within living aphid hosts. Several species have been introduced globally as biological control agents for aphid pests in agricultural and forestry systems. The tribe includes genera such as *Diaeretus*, *Aphidius*, and *Lysiphlebus*.
Aphidius
Aphidius is a genus of small parasitoid wasps in the family Braconidae, subfamily Aphidiinae. Adults are typically less than 3.2 mm in length. All known species are endoparasitoids of aphids, with females laying eggs directly into aphid hosts. The developing larvae consume the aphid from within, eventually killing it and forming a characteristic 'mummy'—a tan or yellow, enlarged exoskeleton from which the adult wasp emerges by chewing a round exit hole. The genus has cosmopolitan distribution and includes species widely used for biological control of aphid pests in agriculture and horticulture.
Aphidius ervi
Aphidius ervi is a parasitoid wasp in the subfamily Aphidiinae, widely distributed globally and extensively used in biological control programs against aphid pests. It parasitizes larger aphid species, particularly Macrosiphum euphorbiae (potato aphid) and Aulacorthum solani (foxglove aphid), and to a lesser extent Acyrthosiphon pisum (pea aphid). The wasp induces host castration and immunosuppression through venom proteins, allowing its larva to develop within the living aphid until emerging from a characteristic 'aphid mummy' by chewing a round exit hole.
Aphidoidea
aphids, plant lice, greenflies, blackflies, whiteflies
Aphidoidea is a superfamily of small sap-sucking insects within Hemiptera, commonly known as aphids. Members possess piercing-sucking mouthparts adapted for feeding on plant phloem. The superfamily includes approximately 5,000 described species across multiple families, with Aphididae being the largest and most economically significant. Many species exhibit complex life cycles involving both sexual and parthenogenetic reproduction, often with seasonal alternation between host plants.
Aphidoletes
aphid midge
Aphidoletes is a genus of predatory gall midges (Cecidomyiidae) whose larvae are specialized aphid predators. The best-known species, Aphidoletes aphidimyza, is widely used in commercial biological control programs against aphids in greenhouse and field crops. Adults are small, delicate flies that feed on honeydew, while larvae actively hunt and consume aphids using paralytic venom.
Aphidoletes aphidimyza
aphid midge
Aphidoletes aphidimyza is a predatory gall midge used worldwide in biological control programs against aphids. Adults are small, delicate, nocturnal flies that feed on aphid honeydew and hide beneath leaves during daylight. The bright orange, slug-like larvae are specialized aphid predators that paralyze prey by injecting venom into leg joints before consuming body contents. The species is commercially mass-produced and distributed as pupae in moist substrate for greenhouse applications.
Aphis nerii
oleander aphid, milkweed aphid, sweet pepper aphid, nerium aphid
Aphis nerii is a cosmopolitan aphid species in the family Aphididae, primarily associated with plants in the dogbane family (Apocynaceae), especially milkweeds (Asclepias) and oleander (Nerium oleander). The species exhibits complex reproductive strategies including parthenogenesis and viviparity, with winged and wingless female morphs. It is a significant pest of ornamental plants and a known vector of multiple plant viruses. The species has been introduced widely beyond its native range and is now found in tropical, Mediterranean, and temperate regions globally.
Aphthona
Spurge Flea Beetles
Aphthona is a genus of flea beetles in the leaf beetle family Chrysomelidae, native to Europe and Asia with approximately 135 species in the Palaearctic region and some 300 species worldwide. Members possess enlarged hind legs adapted for jumping, a characteristic trait of the tribe Alticini. The genus has gained significant attention for biological control applications, with several species introduced to North America to manage leafy spurge (Euphorbia esula), a major invasive weed. Six species—A. abdominalis, A. cyparissiae, A. czwalinae, A. flava, A. nigriscutis, and A. lacertosa—have been used for this purpose, though establishment success varies. Some African species have been identified as pests of Jatropha curcas in biodiesel plantations.
Aphthona cyparissiae
brown dot leafy spurge flea beetle
Aphthona cyparissiae is a small leaf beetle native to Europe, introduced to North America as a biological control agent for leafy spurge (Euphorbia esula), a noxious invasive weed. Adults feed on leaves and flowers, while larvae feed on roots and root hairs, with heavy infestations capable of killing host plants. The species was first released in Wyoming in 1986 and has since established populations across much of the northern United States and Canada. It is a spurge specialist, preferring cypress spurge (Euphorbia cyparissias) in its native range.
Aphthona czwalinai
Aphthona czwalinai is a flea beetle species in the family Chrysomelidae, subfamily Alticinae. It belongs to a genus containing species used for biological control of leafy spurge (Euphorbia esula). The species is native to Eurasia and has been introduced to North America as part of classical biological control programs. Like other Aphthona species, it is a root-feeding specialist on Euphorbia plants.
Aphthona lacertosa
Brown-legged Leafy Spurge Flea Beetle
Aphthona lacertosa is a root-feeding flea beetle native to Eurasia, introduced to North America as a biological control agent for leafy spurge (Euphorbia esula). It was first released in 1990 and more widely in 1997, specifically targeting wet habitats where herbicide use is restricted. The species has established populations in Manitoba, Saskatchewan, and Alberta. Adults are black and morphologically indistinguishable from A. czwalinae in field settings; larvae are the primary damaging stage.
Aphycus
Aphycus is a genus of parasitic wasps in the family Encyrtidae, subfamily Encyrtinae. The genus was established by Mayr in 1876 and contains species that are parasitoids of scale insects (Coccoidea). Species in this genus have been recorded from multiple continents including Europe, North America, and Asia. The UCR Encyrtidae collection holds several Aphycus species including A. apicalis, A. bifasciatus, A. hadzibejliae, A. hederaceus, A. rubescens, A. secundus, and A. shutovae.
Aphytis
Aphytis is a genus of minute chalcid wasps in the family Aphelinidae, comprising approximately 130 described species. These wasps are specialized ectoparasitoids of armored scale insects (Diaspididae), particularly attacking citrus and other economically important pests. Adults typically measure 2–3 mm in length and exhibit coloration ranging from black to yellow with transparent wings. The genus has been extensively studied for biological control applications, with species such as A. melinus mass-reared and released worldwide to manage scale infestations. The University of California, Riverside maintains a critical collection of Aphytis specimens, including type material for numerous species described by Rosen and DeBach.
Apioninae
Pear-shaped Weevils, Seed Weevils, Clover Weevils
Apioninae is a subfamily of small weevils within the family Brentidae, commonly known as pear-shaped weevils, seed weevils, or clover weevils. The subfamily contains at least 20 genera and approximately 80 described species, though diversity is likely higher. Members are characterized by their compact, pear-shaped body form and elongated rostrum. All species are phytophagous, with many exhibiting specialized associations with particular host plant families, particularly Fabaceae, Asteraceae, Malvaceae, and Polygonaceae. Some species are significant agricultural pests of legumes and jute, while others have been employed as biological control agents for invasive plants.
Aproaerema
Aproaerema is a genus of gelechiid moths in the subfamily Anacampsinae. The genus contains at least 11 described species distributed across Africa, Asia, and Europe. Several species are significant agricultural pests, notably Aproaerema modicella (groundnut leaf miner), which causes severe yield losses in groundnut and soybean crops across South and Southeast Asia and has recently invaded Africa. The genus has been subject to taxonomic revision, with molecular and behavioral evidence suggesting relationships among A. modicella, A. simplexella, and related taxa require re-examination.
Aprostocetus
Aprostocetus is a large genus of parasitoid wasps in the family Eulophidae, established by Westwood in 1833. With approximately 800 described species, it has a global distribution across all major zoogeographic regions. Species are primarily ectoparasitoids or endoparasitoids of insects inhabiting plant galls, including gall midges (Cecidomyiidae), gall wasps (Cynipoidea), and other hosts spanning Hemiptera, Coleoptera, Lepidoptera, Blattodea, Orthoptera, and Neuroptera. Some species are phytophagous, inducing galls directly on plants. The genus is economically significant as a source of biological control agents for invasive pests.
Apsilops
Apsilops is a genus of ichneumonid wasps in the subfamily Cryptinae, containing approximately nine described species. Members are parasitoids of lepidopteran larvae, with documented associations including aquatic crambid moths and rice pests. The genus includes both aquatic and terrestrial species, reflecting diverse habitat specializations among its members.
Aptesis
Aptesis is a genus of parasitoid wasps in the family Ichneumonidae, first described by Arnold Förster in 1850. The genus contains approximately 74 described species with an almost cosmopolitan distribution. Species within this genus are primarily ectoparasitoids of sawfly prepupae and cocoons, with some species serving as important biological control agents. Well-studied species include Aptesis nigrocincta, a bivoltine ectoparasitoid of apple sawfly cocoons, and Aptesis basizona, a parasitoid of pine sawflies used in classical biological control programs.
Aptesis nigrocincta
Aptesis nigrocincta is a bivoltine solitary ectoparasitoid wasp that attacks cocoons of the apple sawfly (Hoplocampa testudinea). Females are nearly wingless and significantly smaller than males, an adaptation for searching soil at 10–25 cm depth. The species is considered the most important mortality factor for apple sawfly cocoons in the studied orchard, achieving parasitism rates of 12.1–39.7% per generation.
Archips rosana
Rose Tortrix, Rose Tortrix Moth, Rose Leaf Roller
Archips rosana, the rose tortrix moth, is a leafroller moth in the family Tortricidae distributed across the Palearctic and Nearctic realms. The species is a significant agricultural pest of apple orchards and other fruit crops, with larvae feeding within rolled leaves. Adults are active from May to August, with specific timing varying by location. The species is subject to substantial biological control by parasitoid wasps, with parasitisation rates reaching 24-40% in some populations.
Archytas apicifer
Hornworm Tachinid Fly
Archytas apicifer is a medium to large tachinid fly (10-15 mm) native to the Nearctic region. Adults feed on flower nectar and serve as pollinators. The larvae are internal parasitoids of caterpillars, including economically significant pest species. The species was first described by Francis Walker in 1849 and is one of approximately 10,000 species in the family Tachinidae.
Archytas marmoratus
marbled bristle fly
Archytas marmoratus is a tachinid bristle fly and member of the marmoratus species group. It is a larval-pupal parasitoid of noctuid moth caterpillars, particularly the corn earworm (Helicoverpa zea) and fall armyworm (Spodoptera frugiperda). In 1986, it was successfully employed in biological control programs against the fall armyworm. The species has been used in inundative release programs, achieving parasitism rates exceeding 90% in isolated corn fields.
Arcola
Arcola is a genus of snout moths (Lepidoptera: Pyralidae) in the subfamily Phycitinae, described by Shaffer in 1995. The genus includes species associated with aquatic vegetation, most notably Arcola malloi (Alligatorweed Stem Borer), which has been employed as a biological control agent for the invasive aquatic weed alligatorweed (Alternanthera philoxeroides) in the United States. The genus belongs to a diverse group of pyralid moths whose larvae typically feed on plant material.
Arcola malloi
alligator weed stem borer, Alligatorweed Stem Borer
Arcola malloi is a snout moth species used as a biological control agent against the invasive aquatic plant alligator weed (Alternanthera philoxeroides). Native to South America, it was introduced to the United States in the 1970s and is now established in the southeastern United States. The species is notable for its stem-boring larval behavior that destroys host plant stems from the inside. When present alongside the alligator weed flea beetle, the two species act synergistically to eliminate weed mats.
Argiope trifasciata
banded garden spider, banded orb weaving spider, banded argiope, whitebacked garden spider
A large orb-weaving spider with a nearly cosmopolitan distribution, native to the Americas but now found across six continents. Females construct distinctive spiral orb webs up to 60 cm in diameter, often decorated with zigzag stabilimentum patterns. The species exhibits notable thermoregulatory behavior through strategic web orientation and body positioning. Recent phylogeographic research suggests A. trifasciata may represent a complex of cryptic species rather than a single widespread species.
Argopistes
Olive Flea Beetles
Argopistes is a genus of approximately 50 described species of flea beetles in the tribe Alticini. The genus is notable as the only group of flea beetles specialized for feeding on plants in the family Oleaceae. Species occur worldwide, with documented populations in Asia, Africa, Madagascar, Japan, Taiwan, and North America. Several species are economically significant as pests of olive trees or as biological control agents for invasive privet.
Argyractis
Argyractis is a genus of crambid moths in the subfamily Acentropinae (formerly Nymphulinae), established by Hampson in 1897. The genus contains approximately 13 recognized species distributed primarily in the Americas. At least one species, Argyractis subornata, has been studied as a potential biological control agent for invasive waterhyacinth. Members of this genus are associated with aquatic habitats and exhibit aquatic larval stages.
Argyrogramma
Argyrogramma is a genus of moths in the family Noctuidae, subfamily Plusiinae, tribe Argyrogrammatini. The genus includes at least three described species: A. signata, A. subaurea, and A. verruca. One species, A. albostriata, has been studied as a specialized predator of the invasive plant Solidago canadensis in China, where it exhibits distributional tracking of its host plant under climate change scenarios. The genus is placed within the looper moth group, characterized by larvae with reduced prolegs that move in a looping fashion.
Arhopalus
burnt pine longhorn beetle (A. ferus), black pine sawyer (A. rusticus)
Arhopalus is a genus of longhorn beetles (Cerambycidae: Spondylidinae: Asemini) distributed across the Northern Hemisphere, with several species introduced to the Southern Hemisphere as invasive pests of conifers. The genus comprises approximately 20 described species, with A. rusticus and A. ferus being the most extensively studied due to their economic importance. Species develop in dead or fire-damaged conifer wood, with some exhibiting strong attraction to burnt pine volatiles. Several species produce male-emitted aggregation-sex pheromones containing fuscumol and geranylacetone. Invasive populations in New Zealand, Australia, South America, and South Africa require monitoring at ports and sawmills for timber export compliance.
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te-statemethodological-state-stateepistemological-state-stateontological-state-stateaxiological-state-statepraxeological-state-statelogical-state-staterational-state-statereasonable-state-statesensible-state-statepragmatic-state-statepractical-state-statetheoretical-state-stateconceptual-state-stateempirical-state-stateexperimental-state-stateobservational-state-stateexperiential-state-statephenomenological-state-statehermeneutical-state-statecritical-state-statereflexive-state-statereflective-state-staterepresentative-state-stateAridelus
Aridelus is a genus of braconid wasps in the subfamily Euphorinae, comprising approximately 40 described species with cosmopolitan distribution but greatest diversity in tropical regions. These wasps are solitary koinobiont endoparasitoids of heteropteran bugs, primarily targeting nymphs and adults of stink bugs (Pentatomidae) and related families. Several species have been investigated for biological control potential against agricultural pests, particularly Nezara viridula.
Arilus cristatus
North American wheel bug, wheel bug
Arilus cristatus, the North American wheel bug, is a large assassin bug distinguished by a semicircular, wheel-shaped pronotal crest. Adults reach up to 38 mm in length and are gray to brownish-gray, while nymphs are bright red and black without the characteristic wheel structure. The species is a generalist predator that employs raptorial front legs and a powerful proboscis to subdue and liquefy prey. It is valued as a biological control agent but possesses a defensive bite to humans that is notably painful and prolonged.
Aristotelia ivae
Aristotelia ivae is a small moth in the family Gelechiidae, described by August Busck in 1900. It is native to the southeastern United States, with confirmed records from Florida and Georgia. The species was introduced to Australia in 1969 as a biological control agent for the invasive weed Baccharis halimifolia. Its larvae feed specifically on Iva frutescens in its native range.
Arotes decorus
Arotes decorus is a species of ichneumonid wasp in the family Ichneumonidae. It is known to be a parasitoid of two cerambycid beetle species: Xylotrechus colonus and Yakuhananomia bidentata. The species was described by Thomas Say in 1835 and is part of the diverse and species-rich Ichneumonidae family, which contains thousands of parasitoid wasp species.
Arytaina genistae
Broom Psyllid
Arytaina genistae, commonly known as the Broom Psyllid, is a jumping plant louse in the family Psyllidae. The species is native to Europe and has been introduced to North America, where it has become established across much of the United States. It is associated with brooms (Genista and Cytisus species) as its host plants. The species is of interest both as a potential biological control agent for invasive brooms and as a pest of ornamental and cultivated broom species.
Arytainilla spartiophila
Broom psyllid
Arytainilla spartiophila is a psyllid (Hemiptera: Psyllidae) introduced as a biological control agent for invasive Scotch broom (Cytisus scoparius). It feeds on phloem sap of its host plant and has been subject to post-establishment host specificity studies to assess safety and efficacy. The species is native to Europe and has been introduced to other regions for biocontrol purposes.
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.
Ascidae
Ascidae is a family of predatory mites in the order Mesostigmata. Members occupy diverse habitats including soil, litter, bark, and freshwater margins. Many species are phoretic, dispersing on larger arthropods such as beetles and flies. The family was historically broader, with Blattisociidae and Melicharidae now treated as separate families based on morphological distinctions.
Ascogaster
Ascogaster is a genus of braconid wasps comprising egg-larval endoparasitoids that attack tortricid moth pests. Females oviposit into host eggs, and developing wasp larvae consume host reproductive organs—a process termed host castration—before eventually killing the host. This developmental strategy redirects host resources from reproduction to somatic growth, increasing host size and improving conditions for parasitoid development. Several species have been studied for biological control applications, particularly against the codling moth (Cydia pomonella) and smaller tea tortrix (Adoxophyes spp.).
Asiloidea
asiloid flies
Asiloidea is a large superfamily of true flies (Diptera: Brachycera) with cosmopolitan distribution. It comprises approximately 11 families including the well-known Asilidae (robber/assassin flies), Bombyliidae (bee flies), Therevidae (stiletto flies), Mydidae (mydas flies), and Scenopinidae (window flies). Adult morphology is characterized by antennae with no more than 4 flagellomeres, leg empodium usually setiform or absent, and wing venation featuring an elongate cell cup with vein CuA2 ending freely or meeting A1 near the wing margin. Larval synapomorphies include posterior spiracles arising dorsally from the penultimate abdominal segment and, in most families except Bombyliidae and Hilarimorphidae, a modified cranium forming a hinged metacephalic rod.
DipteraBrachyceraAsiloidearobber-fliesbee-fliesstiletto-fliesmydas-flieswindow-fliescosmopolitanarid-habitatspredatory-larvaeflower-visitorsparasitoidsbiological-controlAsilidaeBombyliidaeTherevidaeMydidaeScenopinidaeApioceridaeApsilocephalidaeApystomyiidaeEvocoidaeHilarimorphidaeMythicomyiidaeProtapioceridaephylogenysystematicsvenomouspredatorymystaxmetacephalic-roddichopticholopticJurassicCretaceoustherevoid-cladeNamib-DesertCanary-IslandsSaudi-ArabiaDominicaChileGermanyfossilcybertaxonomyopen-accessZooKeysBohart-MuseumWorld-Robber-Fly-DayAspidiotus
Aspidiotus is a genus of armored scale insects (family Diaspididae) comprising over 100 described species. Several species are significant agricultural pests, notably Aspidiotus destructor (coconut scale) and Aspidiotus nerii (oleander scale), which infest palms, fruit crops, and ornamental plants across tropical and subtropical regions worldwide. The genus is characterized by the hard, protective scale covering secreted by females. Species within Aspidiotus serve as hosts for specialized bacterial endosymbionts, particularly Candidatus Uzinura diaspidicola, which play roles in host nutrition and potentially influence invasive success.
Aspidiotus destructor
coconut scale, transparent scale, Bourbon scale
Aspidiotus destructor is an armored scale insect (Hemiptera: Diaspididae) known as the coconut scale. It is a globally distributed pest of tropical and subtropical agriculture, causing significant damage to coconut, banana, and numerous other fruit and ornamental plants. The species is notable for its rapid reproduction and the protective waxy test that covers most life stages. It has been the target of extensive biological control efforts, most famously the successful introduction of the lady beetle Cryptognatha nodiceps to Guam in the early 1900s. The species harbors a primary bacterial endosymbiont, Candidatus Uzinura diaspidicola, which may play a role in its biology and potential management.
Astata
Astata is a cosmopolitan genus of solitary predatory wasps in the subfamily Astatinae, family Crabronidae. With 87 recognized species and subspecies worldwide, it is the largest genus in its subfamily. The genus is distinguished by distinctive wing venation patterns and pronounced sexual dimorphism in eye structure. Males possess exceptionally large compound eyes that meet dorsally at the top of the head, while females have normal, separated eyes.
Astata unicolor
Astata unicolor is a solitary, soil-nesting wasp in the family Crabronidae. It is sexually dimorphic: males have black abdomens and enlarged eyes that meet at the top of the head, while females have black and orange abdomens with normal, separated eyes. The species is a predator of stink bugs (Pentatomidae), with documented preference for late-instar nymphs and adults of the invasive brown marmorated stink bug (Halyomorpha halys). Females paralyze prey with a sting, transport it to underground nests, and provision cells for their larval offspring.