This research identifies the best internal control genes to use when measuring gene activity in a fungus that causes pepper disease. Scientists tested eight different reference genes under various conditions like fungal growth and pepper infection, plus when treating the fungus with plant extracts. Different genes worked best for different situations: one gene was best during fungal growth, another during infection, and a third when treated with plant extracts. These findings will help future studies better understand how this disease-causing fungus works and develop better control methods.