Common pesticides change odds in ant fights

Species’ combat success can rise or fall after repeated exposure to a nicotine-related insecticide

DOSED  The southern ant, which is native to New Zealand, can fight ferociously. But chronic exposure to a common neonicotinoid pesticide can alter its aggression and even some battle outcomes.

George Novak

Repeated nonlethal doses of a widely used pesticide can change the outcomes of fights between ant species.