First description of the disease by Conidiobolus osmodes on Tipula paludosa larvae with the report of a natural epizootic.

A new fungal pathogen of Tipula paludosa (Tipulidae: Diptera) larvae, Conidiobolus osmodes (Ancylistaceae: Entomophthorales), was found during a survey of tipulid larval pathogens in Northumbria and Cumbria in England in 1997-1999. The fungus caused an epizootic in a population at Close House during autumn 1999 and spring 2000 with prevalence rising fourfold reaching about 40% in April 2000. The disease development was presented and the fungus was described from naturally infected larvae and artificial cultures.