Encyrtidae

Definition

A large family of minute parasitic wasps (superfamily Chalcidoidea, order Hymenoptera) whose larvae develop as primary parasitoids chiefly within Hemiptera, though many species attack eggs or larvae of Lepidoptera, Coleoptera, and other insect orders. Encyrtids are among the most widely deployed agents in classical biological control programs against agricultural and forest pests, with some species also implicated in population declines of non-target species.

Etymology

From the type genus Encyrtus (Greek kurtos, 'bent, curved,' referring to body shape) + -idae (family suffix).

Example

The encyrtid wasp Metaphycus helvolus, introduced from Australia to California in the 1930s, provided enduring biological control of black scale (Saissetia oleae) on citrus; conversely, the encyrtid Ooencyrtus papilionis contributes substantially to egg mortality in the endangered Homerus swallowtail butterfly (Papilio homerus) in Jamaica.

Related Terms

• Chalcidoidea
• Parasitoid
• Biological control
• Hymenoptera
• primary parasitoid
• Hemiptera

Usage Notes

As a family-level taxon, Encyrtidae takes plural verb agreement in formal taxonomic contexts ('Encyrtidae are diverse'), though singular usage occurs in vernacular writing. The family is distinguished from other chalcidoid families by reduced wing venation, often with a distinct linea calva (bare area) on the forewing, and by larval development typically involving host feeding on hemolymph before consuming vital organs. Many species are polyembryonic, producing multiple genetically identical offspring from a single egg.