Effects of entomopathogenic fungi on Encarsia formosa Gahan. (Hymenoptera: Aphelinidae) activity and behavior

•We examinated the effects of entomopathogenic fungi on T. vaporariorum-E. formosa.•We observed the E. formosa activity in free-multichoice and in no-choice conditions.•We studied its role in transmitting the mycoses horizontally.•E. formosa was not able to locate and select hosts at distance or by direct exploration.•E. formosa was able in vectoring the fungal propagules during its activity.