Seasonal development of entomophthoralean unfection in colonies of
was evalauted on summer barley under conditions of south-western Slovakia in 2001 and 2002.
was infesting summer barley during both years, while
was only recorded in 2002. Further three cereal aphids,
, were also observed on summer barley. Complex of entomophthoralean fungi identified in cereal aphid colonies included four species,
as the most prevalent fungus during both years. Two parasitic fungi,
, were identified from
was predominant. Infection rate in
colonies was low, not exceeding 15% and 10% in 2001 and 2002, respectively. Only nine
individuals were killed with entomophthoralean fungi. The fungi were identified as
. No epizootics were observed in the aphid colonies. The fungi could not control development of the aphid populations since they did not appear until high host densities had been established in the crops.