This research studied how fungi infect and kill moth caterpillars in Argentina, examining how different food plants affect infection rates. The study found that while fungal infections were relatively rare (about 4% of caterpillars), the type of plant the caterpillars ate significantly influenced their chances of getting infected. This has important implications for understanding natural pest control and ecosystem relationships. Impacts on everyday life: • Helps develop better natural pest control methods for agriculture • Improves understanding of how plants naturally defend themselves against insects • Contributes to safer, more sustainable farming practices • Aids in preserving beneficial insects while controlling harmful ones • Advances our knowledge of natural ecosystem relationships