Susceptibility of different populations of ticks to entomopathogenic fungi

► Evaluation of the in vitro fungal action on two Rhipicephalus microplus populations. ► Bioassays were performed with engorged females, eggs and larvae. ► Ticks from FAIZ were more susceptible to the fungal infection than the PESAGRO ticks. ► Tick population's susceptibility also affects the efficacy of biological control.