The maps presented here show the environmental risk for the development of FHB during cereal anthesis (flowering). However, this alone cannot fully predict the occurrence of FHB. Disease development requires several other factors including host resistance, pathogen virulence, agronomic practices, and field history. Therefore, risk levels may not confirm actual disease observed.

How to Use the Map

Welcome to our Fusarium Head Blight Forecasting Tool. This interactive map helps you monitor and predict the risk of Fusarium head blight in your area. Follow these simple steps to make the most of this tool:

  • Select the Crop: Select the crop of interest to view environmental FHB risk for that crop in the Maritimes.
  • Change Dates: Dates can be changed to look at past risk calculations for the previous month.
  • Region Change the region to zoom in on specific provinces.

To use the map correctly, remember that this tool predicts the relative risk of Fusarium head blight (FHB) and DON contamination based on weather conditions during the anthesis period of the crop.

About Fusarium Head Blight

FHB also known as scab, is a destructive disease of small grain cereals such as wheat and barley. In the Maritimes, the biggest species of concern is Fusarium graminearum.

  • Symptoms: Infected plants show bleaching of the spikelets, often starting at the middle of the head and moving upwards. The grains may appear shriveled, discolored, and lightweight.
  • Conditions Favoring Infection: FHB thrives in warm and humid conditions, particularly during the flowering stage of the crop. Wet weather and high humidity can increase the risk of infection.
  • Impact on Yield and Quality: The disease can significantly reduce both the yield and quality of the grains. Infected grains may contain mycotoxins, such as deoxynivalenol (DON), which can be harmful to humans and animals.

Management Strategies:

  • Crop Rotation: Avoid planting small grains in successive years. Rotate with non-host crops like brassicas or soybeans.
  • Resistant Varieties: Use FHB-resistant crop varieties when available. Consult the Maritime cereal performance trial books.
  • Fungicide Application: Apply fungicides at the correct growth stage according to the label.

For more detailed information on FHB and best management practices, please consult your local agricultural extension services.

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