Agonoscelis

Spinola, 1837

Species Guides

Agonoscelis puberula(African cluster bug)

Agonoscelis is a of shield bugs (Pentatomidae) in the tribe Agonoscelidini. The genus contains approximately 19–22 native to the Afrotropics and Australia, with one species, A. puberula, established in the New World. Several species are agricultural pests of sorghum, sunflower, and other crops. range from 8 to 12 mm in length and possess five nymphal stages.

Agonoscelis by (c) prossington, some rights reserved (CC BY). Used under a CC-BY license.

Agonoscelis puberula by (c) Catherine C. Galley, some rights reserved (CC BY), uploaded by Catherine C. Galley. Used under a CC-BY license.

Pronunciation

How to pronounce Agonoscelis: //ˌæɡəˈnɒsɪlɪs//

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Images

Habitat

Agricultural fields, particularly sorghum production areas; specific tree serve as preferred resting and sheltering sites where individuals aggregate with other pentatomids.

Distribution

Native to the Afrotropics and Australia; one (A. puberula) is established in the New World, with the oldest record from Cuba dating to 1978. Within Africa, documented in Sudan (Gedarif, Blue Nile, North Darfur, Sennar States), Botswana, Namibia, South Africa, Zambia, and Angola.

Diet

Developing seeds of sorghum (millet), sunflower, and cereals; also feeds on herbs including horehound and thyme, and has been observed on flax, cotton, coffee, and cacao. Specific feeding damage occurs at the milky stage of grain development.

Host Associations

Sorghum - pestprimary ; causes severe economic damage in Sudan
Helianthus annuus (sunflower) - pestdeveloping seeds
Marrubium vulgare (horehound) - pestA. rutila specific association
Thymus - pestherb feeding
Linum (flax) - pestherb feeding
Gossypium (cotton) - pestherb feeding
Coffea (coffee) - associationswarming observed
Theobroma cacao (cacao) - associationswarming observed

Life Cycle

Five nymphal stages precede adulthood. No further details on developmental timing or reproductive are documented.

Behavior

Aggregates at specific resting sites, particularly certain tree types; forms mixed- with other pentatomids at sheltering locations. Exhibits roosting that facilitates targeted control efforts.

Ecological Role

Agricultural pest causing severe economic damage to sorghum production in Sudan; some may contribute to weed control. Serves as for associated pentatomid at sheltering sites.

Human Relevance

Major pest of sorghum (Dura) in Sudan requiring chemical control campaigns; target of research using oils (neem, sunflower, sesame) as alternatives to synthetic . One introduced to Cuba, possibly via military transport from Angola during Cold War conflicts.

Similar Taxa

Carbula pedalisCo-occurs in Sudan sorghum areas but shelters in mountain caves rather than trees; distinct resting site preference and associated pentatomid
Nezara viridulaBoth are pentatomid agricultural pests, but Agonoscelis are distinguished by Afrotropical/Australian native range and specific association with sorghum and sunflower seed feeding

More Details

Tribe monotypy

Agonoscelis is the sole in the tribe Agonoscelidini, indicating a distinct phylogenetic lineage within Pentatominae.

Scent gland position

The defensive is located terminally at the end of the , a trait noted for the .