Centrodora

Förster, 1878

Centrodora is a of minute in the Aphelinidae, comprising approximately 60 described . The genus is notable for being the most within Aphelinidae, with species attacking of insects across multiple orders including Coleoptera, Hemiptera, Orthoptera, and Hymenoptera, as well as pupae of Diptera and nymphs of Hemiptera. Several species have been investigated as agents for crop and forest pests, including C. darwini and C. scolytivorae. The genus exhibits considerable morphological diversity, with some species groups potentially warranting elevation to separate genera.

Centrodora by (c) Zeke Blankenship, some rights reserved (CC BY), uploaded by Zeke Blankenship. Used under a CC-BY license.

Pronunciation

How to pronounce Centrodora: /sɛn.trəˈdɔː.rə/

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Distribution

occur across multiple continents including Australia (12 described species), Europe (United Kingdom, Italy, Spain), Asia (India, China, Russia), and New Zealand. Specific distribution records include: C. scolytivorae from England (Berkshire); C. italica from Italy (Sardinia, Rome, Campania, Veneto, Friuli Venezia Giulia); C. damoni from Tasmania, Australia; C. scolypopae from New Zealand.

Host Associations

Scolytus scolytus - primary solitary endoparasitoid of European elm bark beetle larvae and pupae; C. scolytivorae
Gonipterus spp. - eucalyptus weevil; C. damoni
Scolypopa australis - passionvine hopper; C. scolypopae, usually with facultative
Pachytrachis gracilis - tettigoniid; C. italica, multiple (up to 7) can emerge from single
Eupholidoptera schmidti - tettigoniid; C. italica
Uromenus brevicollis - tettigoniid; C. italica
Saperda carcharias - cerambycid beetle; C. italica
Euderus caudatus - eulophid ; C. italica

Behavior

Some exhibit ground-searching for (e.g., C. italica searches approximately 2 cm beneath soil surface). C. scolypopae shows facultative as , with as a key factor in diapause maintenance; above-average summer temperatures can trigger pre-winter in up to 60% of on sunny slopes. Sentinel egg exposure is an effective detection method for ground-dwelling species, while standard collection methods (, yellow pan traps, sweep netting, ) are unsuitable.

Ecological Role

agent of various insect pests. C. scolytivorae contributes to natural suppression of bark beetle in forest , potentially reducing tree mortality from transmission. C. scolypopae and C. damoni have been studied for control of agricultural and forestry pests. Multiple of some (e.g., C. italica) can emerge from a single , suggesting potential for high reproductive output.

Human Relevance

Investigated as agents for crop and forest pests. C. darwini has been surveyed in three recent biological control programs for crop pests. C. scolytivorae studied for control of European elm bark beetle. C. scolypopae investigated for management of passionvine hopper in New Zealand. The 's polyphagy and adaptability make attractive candidates for programs, though specificity must be carefully evaluated.