Delphastus catalinae

Distinguished from other coccinellids by its extremely small size (1.4–1.5 mm) and specialized association with whitefly prey. Among Delphastus species, D. catalinae has been separated from D. pusillus based on taxonomic revision; D. pallidus is another congeneric whitefly predator found in Florida. The dark coloration of mature adults and whitefly-specific habitat help distinguish it from larger, more generalized lady beetles. Microscopic examination may be required for definitive identification from similar minute coccinellids.

Agricultural and horticultural systems infested with whiteflies, including greenhouses, field crops, and ornamental plantings. Naturally occurs in ecosystems supporting whitefly populations. Mass rearing conducted on poinsettia (Euphorbia pulcherrima) plants infested with Bemisia argentifolii in controlled greenhouse conditions.

Native to western hemisphere with records from North America including California. Distributed in association with whitefly pests across agricultural regions. Mass reared in northern California for release in southern California. Present in Florida as a naturally occurring predator of invasive whiteflies. GBIF records indicate presence in Azores and North America.

Population dynamics follow whitefly host availability. In controlled greenhouse rearing, continuous production possible with 12-week plant cycles. Field activity corresponds to whitefly population peaks in host crops.

Specialized predator of whiteflies (Hemiptera: Aleyrodidae). Preys on all life stages but prefers eggs and nymphs. Documented prey includes Bemisia argentifolii (silverleaf whitefly), Bemisia tabaci (sweetpotato whitefly), Aleurothrixus trachoides (pepper/solanum whitefly), and Pealius kelloggi. Prey preference demonstrated for different whitefly species and stages.

• Bemisia argentifolii - preysilverleaf whitefly, primary prey for mass rearing
• Bemisia tabaci - preysweetpotato whitefly
• Aleurothrixus trachoides - preypepper whitefly, solanum whitefly
• Pealius kelloggi - preydocumented feeding record
• Euphorbia pulcherrima - rearing host plantpoinsettia, used for mass rearing on whitefly-infested plants
• Ficus benjamina - indirect associationhost plant of whitefly prey in Florida landscapes
• Cucurbita pepo - indirect associationzucchini squash, crop where predator released for whitefly control
• Gossypium - indirect associationcotton, field evaluations conducted for whitefly suppression

Complete metamorphosis with egg, larva, pupa, and adult stages. Eggs 0.2 mm long, clear, elongate. Larvae pale yellow and elongate. Development and reproduction affected by relative humidity, with oviposition, egg hatch, and immature survival responding to humidity levels. Life table parameters established on collards infested with whiteflies. In mass rearing, poinsettia plants cycled through 12-week periods from rooted cuttings to disposal.

Predatory behavior influenced by plant and prey characteristics. Leaf tomentosity affects walking patterns and searching efficiency, with beetles showing preference for smooth prey phenotypes when foraging on hairy leaves. Experience-dependent prey selection observed. Adults demonstrate behavioral responses to odors of Bemisia tabaci and virus-infected plants. Non-consumptive effects on whitefly habitat use patterns documented. Slow and deliberate movement compared to faster-running coccinellids; not a strong flier.

Specialized predator functioning as a biological control agent for whitefly suppression in agricultural and horticultural ecosystems. Contributes to natural biological control of invasive whitefly pests including Bemisia argentifolii, Bemisia tabaci, and Aleurothrixus trachoides. Participates in intraguild interactions with parasitoids such as Encarsia sophia and Baeoentodon balios. Compatible with entomopathogenic fungus Cordyceps fumosorosea for integrated biocontrol.

Widely used in augmentative biological control programs for whitefly management in greenhouse and field crops. Mass rearing protocols established with production of 174,245 adults over 20 weeks at $0.22 per beetle. Applied in cotton, squash, pepper, and ornamental systems. Effective in reducing whitefly populations when used alone or in combination with other biocontrol agents. Compatibility with biopesticides and other natural enemies supports integrated pest management approaches.

• Delphastus pallidusCongeneric whitefly predator found in Florida; distinguished by coloration and geographic distribution
• Delphastus pusillusFormerly considered conspecific or closely related; separated by taxonomic revision, may require microscopic examination for distinction
• Nephaspis oculatusAnother minute coccinellid predator of Bemisia argentifolii; similar size and ecological niche but different genus
• Serangium parcesetosumAnother whitefly-specific lady beetle used in biocontrol; larger and with different color pattern

• biological control
• whitefly predator
• augmentative biocontrol
• agricultural pest management
• mass rearing
• Coccinellidae
• Aleyrodidae
• integrated pest management

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Delphastus pallidus Archives - Entomology Today
• Don't Bet Your Hedges: IPM Guide Outlines Ficus Whitefly Management
• longhorned beetles | Beetles In The Bush | Page 10
• collecting whitefly natural enemies - Entomology Today
• REARING DELPHASTUS CATALINAE (COLEOPTERA: COCCINELLIDAE): PRACTICAL EXPERIENCE AND A MODELING ANALYSIS
• Whitefly Predatory Lady Beetle (suggested common name) Delphastus catalinae (Horn) (Insecta: Coleoptera: Coccinellidae)
• Life history and life table analysis of the whitefly predator Delphastus catalinae (Coleoptera: Coccinellidae) on collards
• Effects of plant and prey characteristics on the predatory behavior of Delphastus catalinae
• Intraguild interactions between an oligophagous predator, Delphastus catalinae (Coleoptera: Coccinellidae), and a parasitoid, Encarsia sophia (Hymenoptera: Aphelinidae), of Bemisia tabaci (Homoptera: Aleyrodidae)
• Searching and Feeding Behavior ofNephaspis oculatusandDelphastus catalinae(Coleoptera: Coccinellidae), Predators ofBemisia argentifolii(Homoptera: Aleyrodidae)
• Compatibility of the Predatory Beetle, Delphastus catalinae, with an Entomopathogenic Fungus, Cordyceps fumosorosea, for Biocontrol of Invasive Pepper Whitefly, Aleurothrixus trachoides, in Florida
• Non-consumptive effects of the predatory beetle Delphastus catalinae (Coleoptera: Coccinellidae) on habitat use patterns of adult whitefly Bemisia argentifolii (Hemiptera: Aleyrodidae)
• Preference of Bemisia tabaci biotype B on zucchini squash and buckwheat and the effect of Delphastus catalinae on whitefly populations
• Behavioral Responses of Delphastus catalinae to Odors of Bemisia tabaci and Tomato Yellow Leaf Curl Virus Disease Complexes: Implications for Biological Control in Vegetable Crops