Bruchidius

Schilsky, 1905

Species Guides

3

Bruchidius is a of seed beetles in the Bruchinae (leaf beetles, Chrysomelidae) containing approximately 300 . Most species are native to the Old World. Larvae typically develop within seeds of plants, with documented associations across multiple plant families including Fabaceae, Apiaceae, and Asteraceae. The genus includes notable species such as Bruchidius siliquastri, a on Cercis species (Judas tree), and Bruchidius villosus, associated with Scotch broom (Cytisus scoparius).

Bruchidius villosus by (c) Jon Sullivan, some rights reserved (CC BY), uploaded by Jon Sullivan. Used under a CC-BY license.Bruchidius villosus by (c) Jon Sullivan, some rights reserved (CC BY). Used under a CC-BY license.Bruchidius villosus by (c) Jon Sullivan, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Bruchidius: //bruːˈkɪdiːəs//

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Images

Distribution

Most native to the Old World. Documented occurrences include: Western Siberia, Russia (Bruchidius apicipennis in Altaiskii Krai); India; Niger; and North Carolina, USA (Bruchidius villosus, introduced range). GBIF records indicate presence in Denmark, Norway, and Sweden.

Diet

Larvae are seed borers. Documented plants include: Fabaceae (legumes, acacias, Cercis , Scotch broom); Apiaceae (carrot and parsley ); and Asteraceae (aster family). of Bruchidius uberatus have been observed feeding on sugar solution and water in laboratory conditions.

Host Associations

  • Cercis siliquastrum - Judas tree; of Bruchidius siliquastri
  • Cercis - ; multiple used by B. siliquastri
  • Acacia nilotica - of Bruchidius uberatus; laboratory study showed 83% hatchability in non-husked seeds
  • Acacia - ; B. centromaculatus group mostly limited to acacias
  • Cytisus scoparius - Scotch broom; of Bruchidius villosus in North Carolina

Life Cycle

Complete : , larva, pupa, . Larval development occurs within seeds. In Bruchidius uberatus, egg hatchability and larval-to-pupal development vary with seed pretreatment: 83% hatchability and 72% successful larval-to-pupal development in non-husked Acacia nilotica seeds; reduced success in de-husked or acid-pretreated seeds.

Ecological Role

Seed ; larvae bore into and consume developing seeds, potentially affecting plant and seed viability. Bruchidius uberatus acts as a seed borer of Acacia nilotica with potential pest status in managed systems.

Human Relevance

Some have potential as biocontrol agents or are regarded as pests. Bruchidius villosus has been studied in North Carolina in relation to Scotch broom, an plant. Seed pretreatment methods (de-husking, acid treatment) have been recommended to reduce Bruchidius damage in Acacia nilotica.

Similar Taxa

More Details

Taxonomic note

Bruchidius was historically placed in Bruchidae, now treated as Bruchinae within Chrysomelidae. The belongs to subtribe Acanthoscelidina.

Species diversity

Approximately 300 described; includes Bruchidius antennatus, B. biguttatus, B. brincki, B. chloroticus, B. cisti, B. endotubercularis, B. faroensis, B. holosericeus, B. lichenicola, B. lineatopygus, B. lutescens, B. meridionalis, B. nodieri, B. obscurevittatus, B. pauper, B. raddianae, B. siliquastri, B. simulans, B. trifolii, B. alfierii, B. apicipennis, B. atrolineatus, B. uberatus, B. unicolor, and B. villosus.

Genome resources

sequence available for Bruchidius siliquastri (Wellcome Open Research, 2024).

Sources and further reading