Late blight management in Switzerland requires 6–7 fungicide applications per season on average, making potatoes the country’s most fungicide-intensive arable crop.In 2017,the Swiss government adopted the Plant Protection Action Plan,which aims to reduce risks associated with plant protection products by 50% by 2027.In 2024,the Swiss potato sector committed to supporting this transition by increasing the share of late-blight-tolerant varieties to 25% of the national area by 2028 and 80% by 2040.Achieving these ambitions will require stronger,more adaptive late blight management,and therefore a new national project has been launched.