Pestilential?

I suppose that nobody is likely to be surprised that President Bolsonaro of Brazil reacts crassly to Greta Thunberg's complaint, about the killing of indigenous people trying to defend the invasion of their lands by exploiters (as encouraged by him), by describing her as a pirralha. This translates as a 'little brat' or a 'pest'. I suspect that he is likely to find that the numbers of 'pests' is increasing in many age groups and they are likely to come back to bite him.