![osr disease](https://www.cpm-magazine.co.uk/wp-content/uploads/sites/9/2023/09/SS-OSR-close-up-RS.jpg?w=435&h=350&crop=1)
18th September 2023
OSR disease: A gradual migration
Traditionally, phoma stem canker has been deemed a southern oilseed rape disease and light leaf spot a northern one, but evidence suggests these diseases are migrating. CPM digs deeper to find out what’s happening.