Farmers use a fungicide called tebuconazole to protect crops, but this chemical is similar to medicines doctors use to treat serious fungal infections in patients. A new study shows that when the fungus Aspergillus fumigatus is exposed to tebuconazole, it becomes resistant not just to this pesticide, but also to the clinical antifungal drugs used in hospitals. The fungus develops resistance mechanisms that allow it to survive high doses of these medications. This research highlights an important public health concern: the overuse of similar chemicals in agriculture can undermine our ability to treat dangerous fungal infections in people.