Remember the DISEASE TRIANGLE when using MAFRD’s FHB Risk Maps

Previously published June 2, 2014, updated June 24, 2015

MAFRD is providing daily maps on the risk of Fusarium Head Blight (FHB) infection.  The maps are available daily on MAFRD’s website at The risk map produced June 24th (see below) shows how the risk for the development of  fusarium head blight has increased over the past few days based on temperature and moisture.


The changes over the past week signal to producers to continually scout their fields for local conditions as their crop progresses.  But remember the disease triangle – the existence of a disease requires three factors: the interaction of a susceptible host, a virulent pathogen, and an environment favorable for disease development. Therefore, although the most current risk map shows high risk levels due to environment in some areas of the province, disease is prevented if the winter/spring wheat is not at the proper stage for infection.

Submitted by:  Pam de Rocquigny, Provincial Cereal Crops Specialist, MAFRD


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