Fusarium Head Blight Risk Maps - Archives The Fusarium Head Blight Risk maps are posted daily, from the beginning of winter wheat flowering until the end of the flowering period for spring wheat. The maps below shows the risk for the development of Fusarium head blight for the date indicated based on the previous seven days of temperature and moisture data. Warm, humid conditions occuring when the crop is susceptible to infection (during flowering) favour the development of this disease.                              For more information contact:  Holly Derksen, Field Crop Pathologist Primary AgriculturePhone: 204-750-4248 Subscribe to Fusarium Head Blight Risk Forecast seasonal notification.