Researchers studied how a chemical called dimethyl fumarate stops the growth of a dangerous fungus (Aspergillus carbonarius) that damages grapes and produces a toxin called ochratoxin A. By analyzing which genes were turned on and off when the fungus was exposed to this chemical, they found that it works by damaging the fungus’s cell walls and disrupting its normal development. This discovery could help protect fruit crops and food safety by providing a natural and non-toxic way to prevent mold growth.