Average daily mean temperature in July

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Temperature is considered a primary factor influencing species dominance in FHB. July temperatures in the western prairies are cooler than in the eastern prairies. F. avenaceum and F. culmorum are considered to be better suited to cooler conditions than F. graminearum. However, F. graminearum is the dominant FHB pathogen in the maritime provinces, where summer temperatures are cooler than on the prairies. Temperature may play a role in moderating FHB in the western prairies, although the extended daylight hours in summer in the more northern areas of the prairies may compensate somewhat for the lower daily mean temperature. One unknown is the impact of global warming on prairie temperatures and precipitation.