Upper Columbia Basin: Burkard spore trap and rotating arm sampler in a Kentucky bluegrass seed field near Paterson, WA (naturally occurring inoculum). Spore production is increasing at this site:

Central Oregon: Burkard spore trap in Kentucky bluegrass plant growth regulator test plots at the Central Oregon Agricultural Research and Extension Center (naturally occurring inoculum). Spores have been detected at this site:

Union County: Rotating arm samplers placed in two Kentucky bluegrass seed fields with moderate and high histories of ergot (naturally occurring inoculum). As of May 19, spores have not been detected at these sites.

Many fields are in full flower (anthesis). Protective fungicides should be applied immediately prior to onset of anthesis and throughout the flowering period to protect unfertilized ovaries from infection. 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 if you have any questions.

This work is funded by the Eastern Oregon Kentucky Bluegrass Working Group, the Washington Turfgrass Seed Commission, the Oregon Seed Council, and the Agricultural Research Foundation.