Scientists tested a natural fungus called Beauveria brongniartii as a pest control solution for tobacco cutworms (Spodoptera litura), which damage crops. The fungus was highly effective at killing the pest at all life stages, with 98% success against eggs and 96% against larvae. Importantly, the fungus was safe for earthworms and other non-target organisms, making it an environmentally friendly alternative to chemical pesticides that harm beneficial species and the soil.