Invasive-species
Guides
Bedelliidae
Bedelliidae is a small family of microlepidoptera containing the single genus Bedellia. These narrow-winged moths were previously classified within Lyonetiidae. The family is best known for the sweet potato leafminer Bedellia somnulentella, an invasive agricultural pest that feeds on Convolvulaceae.
Bellardia
trixago bartsia, Mediterranean lineseed
Bellardia is a monotypic genus of flowering plants in the family Orobanchaceae, containing only Bellardia trixago. This facultative hemiparasitic herb is native to the Mediterranean Basin but has been introduced to California and Chile, where it is considered a noxious weed. The species has been reclassified from Scrophulariaceae to Orobanchaceae based on phylogenetic studies. Its flowers are ethnobotanically consumed as food, and the plant has been investigated for pharmacological properties including antioxidant, antimicrobial, and cytotoxic activities.
Belonochilus
sycamore seed bug
Belonochilus is a monotypic genus of seed bugs in the family Lygaeidae, containing the single species B. numenius, commonly known as the sycamore seed bug. Native to North America, it has become invasive in Europe since its first detection in 2008. The species completes its entire life cycle on the seed balls of plane trees (Platanus spp.) and has been recorded from 17 European countries.
Belonochilus numenius
Sycamore Seed Bug, American Sycamore Seed Bug
Belonochilus numenius is a monotypic seed bug in the family Lygaeidae, native to North America and invasive in Europe since 2008. The species completes its entire life cycle on seed balls of Platanus species. It has spread rapidly across Europe through plant trade and wind dispersal, reaching 17 countries including a widespread distribution in North Macedonia by 2019. High population densities can cause nuisance aggregations in urban areas, though it is not considered harmful to host trees.
Bemisia
Bemisia is a genus of whiteflies in the family Aleyrodidae, containing approximately 40 described species. The genus includes several economically significant agricultural pests, most notably Bemisia tabaci (sweetpotato whitefly or silverleaf whitefly), which is considered one of the 100 worst invasive species globally. Members of this genus are phloem-feeding insects that vector numerous plant viruses and cause direct damage through sap extraction and honeydew secretion. The genus exhibits complex taxonomic challenges, with B. tabaci alone comprising at least 42 cryptic species distinguishable only through molecular analysis.
Bemisia argentifolii
Silverleaf whitefly, Sweetpotato whitefly (B biotype)
Bemisia argentifolii, described by Bellows & Perring in 1994, is a whitefly species belonging to the Bemisia tabaci species complex. It is a significant agricultural pest known for causing silverleafing symptoms in squash, transmitting plant viruses, and developing resistance to multiple insecticides. The species has been documented on over 900 host plants including vegetables, ornamentals, and fiber crops. It is frequently associated with greenhouse and protected cultivation environments but also occurs in open field agriculture in tropical and subtropical regions.
Billaea
Billaea is a genus of tachinid flies comprising approximately 80 described species. Most larvae are parasitoids of beetle larvae, particularly cerambycids and lucanids, with some species attacking lepidopteran hosts in the family Pyralidae. Several species have been investigated as biological control agents for agricultural and forestry pests, including palm weevils and sugarcane borers.
Tachinidaeparasitoidbiological-controlCerambycidaeDryophthoridaeCrambidaeviviparousplanidiaforest-pestagricultural-pestoil-palmsugarcanepalm-weevilwood-borersoutheast-AsiaSouth-AmericaEuropeBulgariaBrazilTurkeyMexicoPeruintegrated-pest-managementnatural-enemyhost-searchingkairomonessuperparasitismmass-rearingGalleria-mellonellalaboratory-hostfrassgallerytunnelpupal-parasitoidlarval-parasitoidectoparasitoidendoparasitoidColeopteraLepidopteraDipteraBrachyceraDexiinaeDexiiniRobineau-Desvoidy-183080-speciesglobal-distributionforestryagricultureornamental-palmsdate-palmcoconutRhynchophorusDiatraeaPrionusXylotrechusclimate-matchingestablishment-potentialMediterraneanMiddle-EastCaliforniainvasive-speciesred-palm-weevilAmerican-palm-weevilred-ring-diseasevector-controlnatural-mortalitypest-managementsustainable-agriculturehost-specificitytrophic-associationnew-host-recordparasitism-ratefield-parasitismlaboratory-rearingadult-longevityfecunditysex-ratiopupal-viabilitypupal-durationplanidia-lengthfood-resourcespollenhoneysucroseflowering-plantsspontaneous-floracompanion-plantshabitat-managementconservation-biological-controlaugmentative-biological-controlclassical-biological-controlquarantinehost-rangecircumstantial-evidencetaxonomic-confusionB.-rhynchophoraeB.-menezesiB.-adelphaB.-claripalpisB.-rutilansB.-cerambycivoraB.-steiniB.-fortisB.-irrorataB.-pectinataB.-setosaB.-trianguliferaB.-lataB.-intermediaB.-biserialisB.-giganteaB.-rubensB.-maritimaB.-marmorataB.-aurifronsB.-verticalisB.-flavaB.-chinensisB.-brevicaudaB.-kurahashiiB.-micronychiaB.-papeiB.-setigeraB.-yintiaolingB.-rufescensB.-triquetrusB.-rubidaB.-rufiventrisB.-brasiliensisB.-friburgensisB.-giacomeliB.-kosteraeB.-plaumanniB.-shannoniB.-africanaB.-argentaureaB.-atkinsoniB.-capensisB.-communisB.-decisaB.-edwardsiB.-erectaB.-ficorumB.-grandisB.-impigraB.-interruptaB.-kolomyetziB.-luteolaB.-malayanaB.-minorB.-monohammiB.-montanaB.-morosaB.-nipigonensisB.-orbitalisB.-ovataB.-quadrinotaB.-rhingiaeformisB.-robustaB.-satisfactaB.-sibleyiB.-sjostedtiB.-solivagaB.-trivittataB.-trochanterataB.-vanemdeniB.-velutinaB.-versicolorB.-villeneuveiB.-vitripennisB.-ziminiB.-lateralisB.-lativentrisBlastobasis
Blastobasis is the type genus of the moth family Blastobasidae (Gelechioidea), containing approximately half of all described species in that family. The genus is taxonomically problematic: its monophyly is seriously doubted, with many presumed relatives separated into small or monotypic genera that may represent specialized lineages within a broader Blastobasinae assemblage. Some formerly independent genera, including Agnoea, Auximobasis, Euresia, and Zenodochium, are variably included or excluded by different authors. Species occur across multiple continents with diverse larval habits, including acorn borers in oaks and stem borers in grasses.
Blastopsylla occidentalis
Eucalyptus Shoot Psyllid
Blastopsylla occidentalis is a psyllid native to Australia that has been introduced to multiple continents, becoming a significant pest of Eucalyptus species in forestry plantations worldwide. The species forms colonies on apical shoot tips where adults and nymphs feed on phloem sap, causing shoot distortion, reduced growth, apical tip death, and general plant weakening. Under field conditions in tropical and subtropical regions, it exhibits polyvoltine reproduction with all life stages present year-round. Population densities fluctuate seasonally, with peaks during dry periods and declines during heavy rainfall.
Blattidae
Household Cockroaches
Blattidae is a family of cockroaches in the order Blattodea, established by Latreille in 1810. The family includes several of the most common household and peri-domestic pest species, notably in the genera *Periplaneta*, *Blatta*, and *Eurycotis*. The family is distributed worldwide, with particular diversity in tropical and subtropical regions. Many species have adapted to human-altered environments, though numerous species remain restricted to natural habitats such as leaf litter and forest floors.
Bootanomyia
Bootanomyia is a genus of parasitoid wasps in the family Megastigmidae. Members are small chalcidoid wasps that develop as parasitoids within oak galls induced by cynipid gall wasps. Two European species morphologically keyed to B. dorsalis have been introduced to North America: one clade found in New York, and another in the Pacific Northwest. These introductions represent the first documented cases of Bootanomyia establishment in North America.
Bosmina
water flea
Bosmina is a genus of small cladoceran crustaceans commonly known as water fleas. Members are distinguished from the related genus Bosminopsis by having antennae that are separated at their bases rather than fused. Bosmina species are filter feeders that consume algae and protozoans approximately 1–3 μm in size, using a dual feeding mechanism involving mesh-like setules on the second and third legs for filtering while the first leg grasps particles. The genus exhibits notable morphological plasticity, particularly in posterior mucrones and anterior antennules, which vary in response to predation pressure. Some Bosmina species have become invasive outside their native ranges, posing threats to aquatic ecosystems.
Brachymyrmex
Rover Ants
Brachymyrmex is a genus of minute ants in the subfamily Formicinae, commonly known as rover ants. Workers are distinguished by having only nine antennal segments—fewer than most ants—and by the petiole being concealed by the gaster in dorsal view. The genus contains 44 species and 17 subspecies, though species-level identification is challenging due to minimal morphological variation, small size, and soft-bodied workers. Brachymyrmex patagonicus, the dark rover ant, has become a significant invasive pest in the southern United States and other regions worldwide.
Brachymyrmex obscurior
Seaside Rover Ant
Brachymyrmex obscurior is a small ant species in the family Formicidae, commonly known as the Seaside Rover Ant. It is recognized as a globally distributed invasive tramp ant species, particularly prevalent in tropical and subtropical urban environments. The species has been documented in the conterminous United States, Hawaii, and Brazil, among other regions. It is frequently associated with human-modified habitats and is considered part of the community of invasive ant species that dominate urban landscapes in areas such as Florida.
Brachymyrmex patagonicus
Dark Rover Ant, Black Rover Ant
Brachymyrmex patagonicus is a small invasive ant native to South America that has established populations across the southern United States, Europe, Asia, and the Caribbean. Workers are diminutive (1.0–2.0 mm), brown to black, with nine-segmented antennae and relatively large eyes compared to congeners. The species exhibits an unusual multicolonial social structure for an invasive ant, with most colonies consisting of a single nest headed by one queen, maintaining aggression toward non-nestmates rather than forming supercolonies. It is a significant nuisance pest of buildings but does not bite, sting, or vector disease.
Brachyponera
Asian needle ants
Brachyponera is a genus of ponerine ants established by Emery in 1900, originally as a subgenus of Euponera. The genus comprises small to medium-sized ants (3–7 mm) with triangular mandibles, native to Africa, southern Asia, and Australia, with highest diversity in Southeast Asia. Several species have become invasive, notably B. chinensis (Asian needle ant) in the eastern United States and New Zealand, and B. sennaarensis (samsum ant) throughout the Middle East. These invasive species are significant public health concerns due to severely painful stings capable of causing fatal anaphylactic shock.
Brachyponera chinensis
Asian needle ant
Brachyponera chinensis, the Asian needle ant, is a ponerine ant native to Japan and mainland Asia that has established invasive populations in the eastern United States since the 1930s. The species exhibits unique pre-adapted traits for invasion success, including tolerance to inbreeding through sib-mating that maintains genetic diversity despite founder effects. It is a termite specialist predator that competes aggressively with native ant species, causing significant biodiversity reductions in invaded areas. The ant poses medical risks to humans through venomous stings that can induce anaphylaxis.
Bruchus pisorum
pea weevil, pea beetle, pea seed beetle
Bruchus pisorum is a seed beetle in the family Chrysomelidae, commonly but incorrectly known as the pea weevil due to historical taxonomic confusion with true weevils (Curculionidae). It is a significant agricultural pest of cultivated pea (Pisum sativum), with larvae developing inside pea seeds. The species is now cosmopolitan in distribution, having spread from its native range in Western Asia through human-mediated transport in stored seeds. It is univoltine, with adults overwintering and emerging in spring to infest pea crops.
Bryobia
clover mites
Bryobia is a genus of spider mites in the family Tetranychidae, comprising over 130 described species with difficult taxonomy and many likely synonyms. These mites are among the largest spider mites, visible to the naked eye, and are distinguished by the arrangement of setae on their bodies. Most species reproduce asexually through thelytokous parthenogenesis, producing all-female populations. Several species are economically significant agricultural pests, including B. praetiosa (clover mite), B. rubrioculus (brown mite), and B. kissophila (ivy mite).
Buprestidae
Jewel Beetles, Metallic Wood-Boring Beetles
Buprestidae is a large family of beetles comprising approximately 15,000 described species in 775 genera, commonly known as jewel beetles or metallic wood-boring beetles. Adults are renowned for their brilliant iridescent coloration produced by structural coloration rather than pigments. Larvae, called flatheaded borers, develop in wood and plant tissues, with many species associated with dying or dead trees. Some species are serious forest pests, notably the emerald ash borer (Agrilus planipennis), while others are attracted to burned forests and can detect infrared radiation and smoke from distances up to 50 miles.
Buprestinae
jewel beetles, metallic wood-boring beetles
Buprestinae is a subfamily of jewel beetles (family Buprestidae) comprising approximately 1,500+ species worldwide. The subfamily contains five recognized tribes: Anthaxiini, Buprestini, Chrysobothrini, Melanophilini, and Xenorhipidini. Members are characterized by their brilliant metallic coloration and sculptured bodies. Adults are primarily phytophagous, with many species visiting flowers for nectar and pollen. Larvae are predominantly wood-borers, though some exhibit leaf-mining habits in tropical regions. Several species are significant forestry pests or invasive species.
Buprestis haemorrhoidalis
Buprestis haemorrhoidalis is a Palearctic jewel beetle (family Buprestidae) described by Herbst in 1780. The species was erroneously reported as established in British Columbia, Canada, based on a misidentified specimen of the native North American species Buprestis subornata. This misidentification propagated through multiple literature sources before correction. The species remains native to Europe and Asia with no confirmed establishment in North America.
Bythotrephes longimanus
Spiny Water Flea, Spiny Waterflea
Bythotrephes longimanus is a predatory planktonic cladoceran crustacean native to northern Europe and Asia that has become a significant invasive species in North America since its introduction to the Great Lakes in the 1980s. Adults reach up to 15 mm in length, with females growing substantially larger than males. The species exhibits cyclic parthenogenesis and produces distinctive morphological forms depending on reproductive mode and season. Its invasion has caused substantial ecological disruption through direct predation on native zooplankton and non-lethal effects that alter prey behavior and population dynamics.
Cacopsylla pyricola
pear sucker, pear psylla
Cacopsylla pyricola is a phloem-feeding true bug in the family Psyllidae and a major economic pest of pear trees (Pyrus communis). Native to Europe, it was introduced to the eastern United States in the early 1800s and has since spread to major pear-growing regions including the Pacific Northwest. The species exhibits distinct seasonal morphotypes: summerforms are pale while winterforms are reddish-brown to black. It is a vector of 'Candidatus Phytoplasma pyri', the causative agent of pear decline disease.
Cacoxenus
Houdini fly
Cacoxenus is a genus of small fruit flies (Diptera: Drosophilidae) whose members are kleptoparasites of solitary bees. The best-documented species, C. indagator, infests nest cells of mason bees (Osmia spp.), laying eggs in pollen provisions intended for bee larvae. Larvae consume the pollen stores and frequently kill the host bee larvae. The common name "Houdini fly" refers to the larvae's ability to escape through mud nest partitions by gnawing exit holes. The genus has been introduced outside its native European range, including North America, where it threatens managed solitary bee populations.
Cacoxenus indagator
Houdini fly
Cacoxenus indagator is a kleptoparasitic fruit fly native to central and southern Europe that has been introduced to North America. Females lay eggs in the pollen-filled nest cells of cavity-nesting solitary bees, particularly mason bees (Osmia species). The larvae consume pollen stores intended for host bee larvae, causing host mortality or reduced adult size. The species is commonly called the "Houdini fly" for its ability to escape sealed nest cells. It poses a significant threat to managed solitary bee populations in commercial pollination operations.
Cactoblastis
Cactoblastis is a genus of snout moths (Pyralidae) described by Émile Louis Ragonot in 1901. The genus contains five described species native to South America, with C. cactorum being the most extensively studied due to its historical role as a biological control agent. Larvae are specialized internal feeders on cactus cladodes, and the genus is notable for complex collective behaviors in neonate caterpillars. C. cactorum was famously introduced to Australia in 1925 to control invasive prickly pear cacti, achieving significant success, though later spreading to threaten native Opuntia species in other regions.
LepidopteraPyralidaebiological-controlOpuntiacactus-mothherbivorysocial-behaviorinvasive-speciesclassical-biological-controlSouth-AmericaAustraliaFloridaneonate-aggregationegg-stickinternal-feedermeristem-feedermandibular-gland-markingtrail-followingcontagious-distributionpopulation-regulationhost-specificityecosystem-impacthistorical-ecologypestconservation-concernCactoblastis cactorum
cactus moth, South American cactus moth, nopal moth
Cactoblastis cactorum is a pyralid moth native to South America that has become globally significant both as a biological control agent and an invasive pest. In its native range, natural predators and parasitoids limit population growth. The species was deliberately introduced to Australia in 1925 for control of invasive Opuntia cacti, achieving dramatic success that inspired further introductions to South Africa, the Caribbean, and elsewhere. Following Caribbean establishment in the 1950s, the moth spread naturally and through human activity to the southeastern United States by 1989, where it now threatens native cactus species and the ornamental cactus industry. The moth exhibits r-selected life history traits including high fecundity, short adult lifespan, and strong dispersal ability.
Callidiellum
Callidiellum is a genus of longhorn beetles (Cerambycidae) in the tribe Callidiini. The genus contains at least three described species, including the well-studied Callidiellum rufipenne, an invasive Asian cedar borer established in North America. Members of this genus are wood-borers specializing on living conifers in the family Cupressaceae.
Callinectes sapidus
blue crab, Atlantic blue crab, Maryland blue crab
Callinectes sapidus is a large portunid crab native to the western Atlantic Ocean and Gulf of Mexico, with established invasive populations in Europe, Asia, and elsewhere via ballast water transport. The species exhibits pronounced sexual dimorphism in abdominal shape and claw coloration. It supports major commercial fisheries, particularly in the Chesapeake Bay and Gulf of Mexico, though populations have declined in some areas due to overfishing and environmental degradation. As an invasive species, it damages fishing gear and competes with native species in introduced ranges.
Callopistromyia annulipes
Peacock Fly
A small picture-winged fly native to North America, introduced to Europe around 2007. Known for its distinctive courtship display in which both sexes raise their wings vertically while strutting on rotting wood. The species has spread rapidly across Europe, with records from more than fifteen countries. Adults are 3.5–5.5 mm in length and active primarily in spring and fall.
Callosobruchus maculatus
cowpea weevil, cowpea seed beetle, bean beetle
Callosobruchus maculatus is a seed beetle (family Chrysomelidae, subfamily Bruchinae) commonly known as the cowpea weevil or cowpea seed beetle, despite not being a true weevil. It is a major pest of stored legumes, particularly cowpea (Vigna unguiculata), causing seed losses of 60–100% in infested stores. The species has a cosmopolitan distribution across all continents except Antarctica, having spread globally through human trade of legumes. It exhibits notable sexual dimorphism, with females typically darker and larger than males. The species is widely used as a model organism in evolutionary biology, behavioral ecology, and developmental studies due to its rapid generation time, ease of laboratory rearing, and well-characterized life history.
Callosobruchus phaseoli
cowpea weevil, bean weevil
Callosobruchus phaseoli is a seed beetle in the family Chrysomelidae, subfamily Bruchinae, commonly known as the cowpea weevil. Native to India, it has become a widespread invasive pest of legume crops across tropical and subtropical regions worldwide. Adults emerge from infested seeds and immediately mate, with females beginning egg-laying on the same day. The species causes significant damage to stored legume seeds and is known to exhibit scramble competition behavior during larval development.
Caloptilia triadicae
Chinese Tallow Leaf Miner
Caloptilia triadicae is a small moth in the family Gracillariidae, described by Davis in 2013. It is a leaf-mining specialist on Chinese tallow tree (Triadica sebifera), an invasive plant in the southeastern United States. The species is adventive (non-native) in North America and has been investigated for its potential as a biological control agent. Its seasonal abundance patterns and parasitoid associations have been studied in Florida.
Calosota
Calosota is a genus of chalcidoid wasps in the family Eupelmidae, subfamily Calosotinae. The genus was established by Curtis in 1836. Species in this genus are parasitoids, with at least one species, Calosota elongata, documented as a parasitoid of wood-boring beetles.
Cambaridae
Cambarid Crayfishes
Cambaridae is the largest family of freshwater crayfish, comprising over 400 species. The family is predominantly native to eastern North America and Mexico, with a small number of species in eastern Asia (genus Cambaroides) and the Caribbean (Cuba). Several species have become invasive outside their native ranges, while many others have restricted distributions and are threatened with extinction.
Cameraria
Cameraria is a genus of leaf-mining moths in the family Gracillariidae. Larvae feed internally on leaf tissue, creating distinctive mines. The genus includes both native and invasive species, with Cameraria ohridella being a notable invasive pest of horse-chestnut trees in Europe. Species are associated primarily with host plants in the families Sapindaceae (Aesculus, Acer) and Fagaceae (Quercus, Castanea).
Camponotus planatus
compact carpenter ant, short carpenter ant
Camponotus planatus is a Neotropical carpenter ant species characterized by polygynous colony structure—one of only three Camponotus species known to maintain multiple queens per colony. The species exhibits a distinctive compact body form and has been documented as an invasive species spreading in Florida and Texas. Workers display kin discrimination based on matrilineal relatedness, with division of labor organized along queen lineages within colonies. The species serves as a model for Batesian and Wassmanian mimicry by multiple arthropod species, and has been observed tending the endangered Miami blue butterfly caterpillar in Florida.
Caprella mutica
Japanese Skeleton Shrimp
Caprella mutica is a highly invasive caprellid amphipod native to the Sea of Japan. It has spread to temperate coastlines worldwide through maritime shipping and aquaculture, becoming established in the North Atlantic, North Pacific, New Zealand, and most recently South America. The species exhibits pronounced sexual dimorphism, with males reaching 50 mm and females averaging 15–20 mm. It is characterized by densely setose first and second pereonites in males and remarkable ecological plasticity, enabling dense populations on artificial structures.
Carcinus maenas
European green crab, green crab, shore crab, green shore crab, European shore crab
Carcinus maenas is a highly invasive littoral crab native to the northeast Atlantic Ocean and Baltic Sea. Listed among the world's 100 worst invasive alien species, it has established populations across temperate coastlines worldwide including North America, Australia, South America, and South Africa. The species exhibits remarkable phenotypic plasticity, with color morphs ranging from green to red that differ in aggression and stress tolerance. Its successful global dispersal occurs through multiple mechanisms including ballast water, ship hull fouling, and aquaculture transfers.
Cardiocondyla venustula
Larger Black Sneaking Ant
Cardiocondyla venustula is a small myrmicine ant native to Africa, with introduced populations in the Caribbean and North America. The species belongs to the C. shuckardi group and exhibits an intermediate reproductive strategy among congeners, with wingless males that attack freshly eclosing rivals but rarely engage in lethal combat with established competitors. Instead, males establish and defend small territories within their natal nests. The species shows considerable genetic diversity across its native range, with multiple mtDNA lineages detected in South Africa, Angola, and Côte d'Ivoire that are morphologically and nuclearly similar, indicating a complex taxonomic history.
Carpophilus
sap beetles
Carpophilus is a genus of sap beetles (Nitidulidae) containing numerous species worldwide. Adults are small (approximately 3 mm), oblong beetles with short elytra that expose the last two abdominal tergites. Several species are significant agricultural pests of fruits, nuts, and stored products. The genus exhibits diverse ecological roles, with some species acting as pollinators while others serve as vectors of plant pathogens.
Ceratitis
Mediterranean fruit flies
Ceratitis is a genus of tephritid fruit flies comprising approximately 80 species, with Ceratitis capitata (Mediterranean fruit fly) being the most economically significant and widely studied. The genus is organized into six subgenera: Acropteromma, Ceratalaspis, Ceratitis, Hoplolophomyia, Pardalaspis, and Pterandrus. Multiple Ceratitis species are major agricultural pests, particularly in Africa, the Mediterranean region, and areas where they have been introduced. The genus has been extensively studied for sterile insect technique applications, with C. capitata serving as a model organism for biological control research.
Ceratitis capitata
Mediterranean fruit fly, medfly
Ceratitis capitata, the Mediterranean fruit fly or medfly, is a highly destructive agricultural pest native to sub-Saharan Africa. It has established populations across tropical and subtropical regions worldwide, with frequent incursions into temperate areas including California, Florida, and Texas. The species is considered one of the most economically important fruit flies due to its exceptionally broad host range—over 200 fruit and vegetable species—and its ability to tolerate cooler climates better than most tropical fruit fly species. Adults are small yellow-brown flies with distinctive black thoracic markings.
Cercopoidea
froghoppers, spittlebugs
The superfamily Cercopoidea comprises hemipteran insects commonly known as froghoppers or spittlebugs. Adults possess powerful hind legs enabling jumps up to 70 cm vertically and 100 times their body length. Nymphs are renowned for producing foam shelters ("cuckoo spit") from excreted xylem sap, within which they develop concealed from predators and environmental extremes. The group exhibits xylem-feeding, an unusual trait among sap-feeding insects requiring symbiotic bacteria to supplement nutrient-poor diet.
Ceroplastes
wax scales
Ceroplastes is a genus of wax scales in the family Coccidae, comprising more than 130 described species. These insects are characterized by the conspicuous white, waxy coverings they secrete, which protect their soft bodies. Adults are largely sessile and feed on plant sap using piercing-sucking mouthparts. Many species are economically significant pests of ornamental plants, fruit trees, and shrubs. The genus exhibits parthenogenesis in many species, with females reproducing without males. Climate change has facilitated the northward expansion of several species from southern regions into previously cooler areas.
Ceroplastes cirripediformis
barnacle scale, barnacle wax scale
Ceroplastes cirripediformis, commonly known as the barnacle scale or barnacle wax scale, is a soft scale insect (Hemiptera: Coccidae) recognized for its distinctive waxy covering that resembles a small barnacle. It is a destructive invasive pest with a broad host range spanning numerous plant families. The species has expanded its range globally through human-mediated transport and climate change, with established populations across North America, South America, Europe, Asia, Africa, and Oceania. Females reproduce parthenogenetically, producing up to a thousand eggs annually without observed males in wild populations.
Ceroplastes rubens
red wax scale, pink wax scale, ruby wax scale
Ceroplastes rubens is a soft scale insect in the family Coccidae, commonly known as the red wax scale or pink wax scale. Native to Africa, it has become widely distributed across tropical and subtropical regions including Australia, Asia, and the Pacific Islands. The species is highly polyphagous, feeding on sap from over 193 plant genera in 84 families, with significant economic impact on citrus, mango, avocado, and ornamental plants. Adult females are covered in a distinctive hard, pink to pale red wax covering approximately 3-4 mm in diameter. Reproduction is primarily parthenogenetic, with 1-2 generations per year depending on climate.
Ceroplastes rusci
Fig Wax Scale
Ceroplastes rusci, commonly known as the fig wax scale, is a soft scale insect (family Coccidae) native to the Mediterranean region. First discovered in Florida in 1994-1995, it has since spread to numerous countries across six continents and is recognized as a significant agricultural and forestry pest. The species feeds on more than 94 genera from 52 plant families, with notable impacts on figs, citrus, grapes, and ornamental plants. Climate change modeling predicts expanding suitable habitat ranges through 2100, increasing its invasive potential in temperate regions.
Ceroplastes sinensis
Chinese Wax Scale
Ceroplastes sinensis is a cosmopolitan scale insect pest of commercial citrus and other woody plants. Native to Central or South America based on cladistic analysis, it has established populations across temperate regions including Australia, New Zealand, Mediterranean Europe, North America, and parts of Asia. The species produces a distinctive waxy covering and completes a single annual generation in temperate climates. It has become a significant agricultural pest, particularly in citrus groves, prompting development of integrated pest management sampling protocols and biological control efforts.