Aphidiinae

Aphid Mummy Wasps

Tribe Guides

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Aphidiinae is a of Braconidae comprising approximately 400 in 50 worldwide. These are koinobiont endoparasitoids that develop exclusively within , with larvae consuming the host from the inside. Most species pupate inside the dead aphid, though members of the tribe Praini exit below to form external volcano-like cocoons. The group is economically significant for of aphid pests in agriculture and horticulture.

Praon by (c) portioid, some rights reserved (CC BY), uploaded by portioid. Used under a CC-BY license.Diaeretiella by (c) Whitney Cranshaw, Colorado State University, Bugwood.org, some rights reserved (CC BY). Used under a CC-BY license.Trioxys by (c) Tom, some rights reserved (CC BY), uploaded by Tom. Used under a CC-BY license.

Pronunciation

How to pronounce Aphidiinae: /əˌfɪdiˈaɪniː/

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Identification

Distinguished from other Braconidae by exclusive association with and koinobiont endoparasitoid development. Tribal identification relies on : Praini (including Praon) form external volcano-like cocoons below the host, while Aphidiini, Ephedrini, Trioxini, and Aclitini pupate internally within the mummified aphid. Molecular phylogenetic analysis supports placement within Braconidae rather than as a separate Aphidiidae.

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Habitat

Occurs in diverse environments including agricultural fields, orchards, urban greenery, and natural vegetation. Distribution across correlates with presence and vegetation diversity; positive relationship observed between plant and abundance in urban settings.

Distribution

Worldwide distribution with primary concentration in the Northern Hemisphere. Documented from Europe, Asia (including Turkey, Thailand, India, South Korea, Japan), North America, and other regions. Several introduced outside native ranges for .

Seasonality

Activity period varies by region; in Eastern Anatolia, Turkey, collections occurred May–August. Seasonal dynamics influenced by cycles.

Host Associations

  • aphids (Aphididae) - obligate koinobiont endoparasitoid; larva develops within living , consuming tissues from inside

Life Cycle

Koinobiont endoparasitoid development: female ovipits into ; larva develops internally while host continues limited activity; host eventually dies and becomes 'mummy'. Most pupate within the mummified aphid, with adult emerging through exit hole. Exception: Praon and related (tribe Praini) exit host to pupate externally in volcano-like cocoon.

Behavior

Solitary ; females locate across broad ranges. Exhibits density-dependent progeny production. occurs in some . Natural and obligatory documented within following host .

Ecological Role

Primary agent of in natural and agro-. constrained by hyperparasitoid pressure and intra-guild . specialization patterns vary: some relatively narrow in host range, others broader but rarely true .

Human Relevance

Widely used in programs for agricultural and horticultural pests. including Aphidius colemani, A. ervi, Diaeretiella rapae, and Lipolexis oregmae commercially mass-reared and released in greenhouses and fields. efforts focus on maintaining refugia to sustain when target pests are absent.

Similar Taxa

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Systematic position

Long treated as separate Aphidiidae, now firmly placed as within Braconidae. Phylogenetic relationships to other braconid subfamilies remain unresolved.

Tribal classification

Five tribes recognized: Ephedrini, Praini, Trioxini, Aclitini, and Aphidiini (with three subtribes). Praini's external considered secondary loss of internal pupation characteristic of other tribes.

Host specialization

range varies from narrow (monophagous) to relatively broad, but true appear rare. Genetic structuring of often correlates with specific host-plant associations, with cryptic detected in supposedly generalist such as Diaeretiella rapae.

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