Effective management of FHB in small grain cereals continues to be a challenge for Prairie cereal producers. Even though they follow recommendations to use an integrated approach, including combining rotation, variety choice and fungicide application, significant issues related to downgrading, end use market acceptability, and mycotoxin contamination of harvested grain still occur. One factor that may be related to poor FHB and mycotoxin (deoxynivalenol, DON) suppression is fungicide timing. Current label application windows for wheat and barley start too early and may compromise FHB and mycotoxin (deoxynivalenol) suppression. The target for an FHB fungicide application are cereal heads themselves and thus coverage should focus on fully emerged heads. However, there are concerns that delayed fungicide timings may compromise efficacy. Fortunately, recent research from Canada and the USA suggests delayed fungicide application may not compromise efficacy and in fact may result in better management. Kelly’s presentation will focus on when FHB infections occur and how this relates to getting the most out of your fungicide application for FHB and DON suppression.

Integrated Pest Management CEUs: 0.5