Updated spore counts are available for the Lower Columbia Basin of Oregon:

The final week of May began with extremely large spore counts (>40,000 spores/day), but spore production tapered off as the month wound down. However, the number of spores captured per day was still relatively high (>600 spores/day) compared to other locations.

Protective fungicides should be applied at the onset of anthesis to protect unfertilized flowers from infection, and cultivars with prolonged flowering periods may require more than one application.

Please refer to the PNW Plant Disease Management Handbook for more information on fungicide options for ergot (https://pnwhandbooks.org/plantdisease/host-disease/grass-seed-ergot), or contact Jeremiah Dung using the “Leave a reply” link above.

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