Diabroticina

Genus Guides

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Diabroticina is a subtribe of leaf beetles (Chrysomelidae: Galerucinae: Luperini) comprising approximately six and numerous , many of which are economically significant agricultural pests. The subtribe exhibits striking , particularly in the Neotropics, with feeding habits ranging from highly to oligophagous on single . primarily feed on pollen, while larvae are root-feeders. Ecological and behavioral data remain incomplete for most non-pest species.

Synetocephalus autumnalis by (c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon. Used under a CC-BY license.Cerotoma by (c) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), uploaded by Jan Ebr & Ivana Ebrová. Used under a CC-BY license.Cerotoma by (c) Francisco Farriols Sarabia, some rights reserved (CC BY), uploaded by Francisco Farriols Sarabia. Used under a CC-BY license.

Pronunciation

How to pronounce Diabroticina: /dɪəˌbrɒtɪˈsaɪnə/

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Habitat

Occurs in diverse environments including agricultural systems and reconstituted tallgrass prairie . Associated with plants of Cucurbitaceae and other flowering vegetation supporting pollen-feeding .

Distribution

of Diabroticina are distributed across the Americas, with notable diversity in South America. Specific distribution data for the subtribe as a whole is not well-documented in available sources.

Diet

are mainly pollen feeders. Larvae are root-feeders. breadth varies from highly to oligophagous on a single host . Feeding on Cucurbitaceae is mediated by cucurbitacin content in plant tissues.

Host Associations

  • Cucurbitaceae - larval and feeding substratefeeding influenced by cucurbitacin content in cotyledons
  • Various flowering plants - pollen sourceprimary food source across most

Behavior

Feeding on cucurbit is influenced by cucurbitacin content, with differential responses to varying concentrations of these bitter compounds. Chemical involves kairomonal cues that mediate environmental interactions.

Ecological Role

Herbivore; some function as pests of agricultural crops. Trophic interaction networks show heterogeneous patterns: most species connect with few plants, while few species interact with many hosts.

Human Relevance

Several are economically significant agricultural pests, particularly rootworms damaging cucurbit and other crop plants. The subtribe includes pest species such as Diabrotica speciosa and D. viridula in South America.

More Details

Research gaps

breadth for root-feeding larvae and for feeding and oviposition remains largely unknown for the majority of non-pest . A more robust analysis of trophic interactions requires greater representation of neotropical Diabroticina and their host relationships.

Taxonomic note

The subtribe Diabroticina is classified within tribe Luperini, Galerucinae, Chrysomelidae. It is sometimes referred to as 'diabroticite beetles' in ecological literature.

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Sources and further reading