This study tested different fungicides to control a fungus that causes wood damage and necrosis in hazelnut trees in Chile. Researchers evaluated 30 different products in laboratory tests, pot experiments, and field trials over two growing seasons. The results showed that certain chemical fungicides and beneficial bacteria can effectively reduce damage from this disease, with effectiveness varying based on temperature conditions. These findings provide farmers with practical options for protecting hazelnut orchards from this damaging fungal disease.