Ergot ascospores have been detected in the Grande Ronde Valley at spore trap sites KBG2 and KBG3.
It is recommended that growers scout fields as grass seed crops approach anthesis.
Protective fungicides should be applied prior to the onset of anthesis to protect unfertilized flowers from infection.
Cultivars with prolonged flowering periods may require multiple applications.
Please refer to the PNW Plant Disease Management Handbook for more information (https://pnwhandbooks.org/plantdisease/host-disease/grass-seed-ergot).