Spore trap results confirmed the presence of airborne ergot ascospores in the Lower Columbia Basin of Oregon (top) and Washington (bottom):
*Figure updated on 5/21/20 to reflect the average number of cells per ascospore (Tiffany 1948).
*Figure updated on 5/21/20 to reflect the average number of cells per ascospore (Tiffany 1948).
The spore counts presented above are intended to show daily trends in spore production in their respective areas and do not necessarily indicate inoculum pressure in your field(s). Spore production can vary from field to field, and inoculum pressure tends to be higher in older fields with a history of ergot in the previous season, or in new fields planted next to established fields with a history of ergot.
