Chasmodon
Haliday, 1838
Chasmodon is a of in the Braconidae. in this genus are ground-dwelling and function as parasitoids of stem-boring Diptera, particularly frit flies (Oscinella spp.) in grassland . The genus has been documented in northern Europe including Denmark, Norway, and Sweden.
Pronunciation
How to pronounce Chasmodon: /ˈkæsmoʊˌdɒn/
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Habitat
Grassland . At least one , C. apterus, is ground-dwelling and associated with grassland swards in agricultural and pastoral settings.
Distribution
Northern Europe: documented from Denmark, Norway, and Sweden. Study records from grassland in northern England.
Host Associations
- stem-boring Diptera - explicitly stated in source; includes frit flies (Oscinella spp.)
Life Cycle
stages develop within larvae. are ground-dwelling and emerge to continue the .
Behavior
Ground-dwelling habit in . Adults have been observed to survive single ploughing events but are vulnerable to intensive soil such as double-ploughing.
Ecological Role
Human Relevance
Agricultural significance as a natural enemy of frit flies, which are pests of grassland and cereal crops. Conservation-relevant: soil practices directly impact survival, with minimal or no tillage recommended to preserve populations.
More Details
Agricultural management implications
Research on C. apterus indicates that ground preparation methods affect survival. Single ploughing allowed survival in one study year, while double-ploughing reduced numbers substantially. This suggests that reduced tillage or no-till approaches in sward improvement may benefit this agent.