Trialeurodes vaporariorum

Definition

A species of whitefly (Hemiptera: Aleyrodidae) and major cosmopolitan pest of protected horticulture. Adults are minute (1–2 mm), yellowish, with four wax-coated wings held tent-like over the body; nymphs are sessile, oval, and sap-feeding on leaf undersides. Native to temperate regions but now globally distributed in greenhouses, polytunnels, and conservatories, where it infests tomato, cucumber, poinsettia, and numerous ornamental crops. Damage occurs through direct phloem feeding, honeydew secretion promoting sooty mold, and transmission of plant viruses such as Tomato infectious chlorosis virus and Criniviruses.

Etymology

Trialeurodes: Greek 'tria' (three) + 'aleurodes' (floury, referring to wax secretion); vaporariorum: Latin genitive plural, 'of steam houses/greenhouses', referencing its association with heated glasshouses.

Example

In integrated pest management programs, Trialeurodes vaporariorum is often controlled by releases of the parasitoid wasp Encarsia formosa, which lays eggs in whitefly nymphs; however, heavy infestations may require rotation between insect growth regulators (buprofezin, pyriproxyfen) and systemic neonicotinoids to prevent resistance development.

Synonyms

• glasshouse whitefly
• Greenhouse whitefly

Related Terms

• Aleyrodidae
• whitefly
• Encarsia formosa
• phloem feeder
• honeydew
• Sooty mold
• Integrated Pest Management
• protected agriculture
• hemipteran
• sap-feeding insect

Usage Notes

Distinguished from the congeneric bandedwinged whitefly (Trialeurodes abutilonea) and the more recently invasive silverleaf whitefly (Bemisia tabaci complex), which differ in wing posture, host range, and virus transmission capacity. The common name 'greenhouse whitefly' is sometimes applied loosely to any whitefly in protected culture, but properly refers only to this species. In taxonomic literature, the authority (Westwood, 1856) is often appended.