Blastophaga psenes

Distinguished from other fig wasps by host specificity to Ficus carica and Ficus palmata. Females are recognized by their minute size (~2 mm), black shiny bodies, and extremely thin transparent wings that detach upon entering fig syconia. Males are wingless and smaller, emerging before females within the syconium. Presence of female wings at fig ostioles is diagnostic. Distinguished from closely related genus Wiebesia by host fig association and subtle morphological characters. Non-pollinating fig wasps such as Philotrypesis caricae can be distinguished by oviposition behavior (external vs. internal to florets) and lack of pollen transport.

Strictly associated with fig syconia of Ficus carica and Ficus palmata. Breeds within the enclosed inflorescence (syconium) of male caprifigs. No external nest construction; entire life cycle occurs within figs. Availability of receptive syconia in appropriate phenological stage (receptive phase emitting pentane) is critical for habitat suitability.

Native to the Palaearctic region, particularly Southern Europe and the Mediterranean Basin. Widely introduced globally to regions where Ficus carica is cultivated commercially, including California and Tunisia. Distribution is constrained by presence of host fig species.

Activity synchronized with fig phenology. Population peaks in spring when spring caprifigs are abundant; winter caprifigs support smaller populations due to reduced resources. Females typically produce three broods annually, corresponding to seasonal caprifig crops. Adult emergence timed to coincide with male fig flower pollen release.

Larvae feed on hyperplastic floret tissue produced by the mother wasp during oviposition. Adults do not feed; brief adult lifespan (days to weeks) supported by larval reserves.

• Ficus carica - obligate mutualistPrimary host; common fig. Wasps pollinate female flowers while breeding in male flowers.
• Ficus palmata - obligate mutualistSecondary host; closely related to F. carica.

Eggs laid in female flowers of syconium. Larvae develop within fig ovaries, inducing gall formation. Pupation occurs within galls. Adults emerge when male fig flowers release pollen. Males emerge first, search for females, and mate within syconium; males then enlarge fig opening and die. Females emerge, collect pollen, and disperse to locate new receptive syconia. Entire cycle completed within single syconium generation; no overlapping generations within same fig.

Females locate receptive figs using olfaction, specifically detecting pentane emitted by figs in receptive phase from at least 5 meters away. Upon locating a fig, females assess suitability by antennal contact with the ostiole before entry. Wings and antennae detach during entry through narrow ostiole. Females exhibit rush dispersal behavior upon emergence, competing to enter adjacent syconia. Males exhibit precocious emergence and mate-searching behavior; some mating occurs before females fully emerge from cocoons. Males enlarge exit holes to facilitate female dispersal.

Obligate pollinator of Ficus carica and F. palmata; mutualism is species-specific and essential for fig reproduction. Serves as host for nematode parasite Schistonchus caprifici and bacterial associate Serratia ficaria. Prey for ants that use fig odor cues to locate wasps. Vector for fungal pathogen Fusarium moniliforme (fig endosepsis).

Essential for commercial fig production; global introductions to support Ficus carica cultivation. Documented as potential trigger of anaphylaxis in mastocytosis patients, with antigens present in female figs. Source of bacterial species Serratia ficaria. Subject of entomological research on mutualism, coevolution, and fig-fig wasp specificity.

• Wiebesia spp.Closely related genus that also pollinates Ficus species; distinguished by host fig associations and subtle morphological differences.
• Philotrypesis caricaeNon-pollinating wasp associated with same fig hosts; distinguished by external oviposition, lack of pollen transport, and potential kleptoparasitic relationship.

• fig wasp
• pollinator
• mutualism
• chalcidoid
• agaid
• Ficus
• sexual dimorphism
• olfaction
• chemoattraction

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Wasps, Wasps, Wasps: Weird and Wonderful Wasps | Bug Squad
• Mastocytosis and the Fig Wasp (<b><i>Blastophaga psenes</i></b>)
• Serratia ficaria sp. nov., a bacterial species associated with Smyrna figs and the fig waspBlastophaga psenes