Itoplectis conquisitor

(Say, 1835)

Itoplectis conquisitor is an ichneumonid endoparasitoid first described by Thomas Say in 1835. The is notable for its broad range and has been extensively studied for its potential in . can be maintained on artificial diets without host material, and the species was the first parasitic insect reared on an artificial host. Females exhibit associative learning capabilities and can be conditioned to host-associated cues.

Itoplectis conquisitor by (c) Zachary Dankowicz, some rights reserved (CC BY), uploaded by Zachary Dankowicz. Used under a CC-BY license.

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Itoplectis conquisitor by Gerald J. Lenhard, Louisiana State University, Bugwood.org - See more at: http://www.insectimages.org/browse/detail.cfm?imgnum=0014194#sthash.iQcL5IzU.dpuf. Used under a CC BY-SA 3.0 license.

Pronunciation

How to pronounce Itoplectis conquisitor: /ˌaɪtoʊˈplektɪs kənˈkwɪsɪtɔr/

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Distribution

Native to North America with records from the East Coast (Pennsylvania to Florida), West Coast (British Columbia to Central America and Ecuador), and north to Québec, Canada and Alaska. Sparse regional observations in Western North America. Introduced reported in Europe.

Host Associations

Galleria mellonella - pupa (larval development, feeding)Blood used in natural food regimen for ; artificial diets can substitute
Thymelicus lineola - No preimaginal conditioning observed when reared on this
Thyridopteryx ephemeraeformis - Bagworm; accounted for 58% of parasitized individuals in Virginia study; inversely related to size, with ovipositor length insufficient to penetrate hosts >57 mm
Rhyacionia buoliana - European pine shoot moth; abundance influenced by tree
Celerio euphorbiae - used in oviposition induction studies

Life Cycle

Endoparasitoid development occurs within pupae. First successful rearing on artificial host achieved in 1978, producing males from encapsulated synthetic medium. Larval nutritional requirements have been established for chemically-defined synthetic diet rearing, with initial yields of approximately 17% adults in .

Behavior

Females exhibit associative learning: can be conditioned to associate color with presence, affecting searching but not attack distribution once hosts are located. Innate preference for blue over yellow demonstrated. Can be conditioned to attack tubes of particular lengths or diameters and tubes mounted on pins rather than plastic forms, suggesting recognition of host shelter characteristics. No preimaginal conditioning: no preference for natal host when exposed to alternative hosts.

Ecological Role

endoparasitoid of lepidopteran pupae. Potential selective agent for size at . Practices multiparasitism. Not considered a significant control agent of host due to size-dependent limitations.

Human Relevance

Studied extensively as a model organism for and artificial rearing techniques. Development of artificial diets and rearing methods facilitates mass production for potential applications. Research on associative learning and -searching informs biological control release strategies.