Plant Health Progress
Effects of Nitrogen Source on Microdochium Patch of Annual Bluegrass in Western Oregon
Microdochium patch, caused by the fungal pathogen Microdochium nivale, damages putting greens during cool and humid conditions. Previous research has determined that frequent winter sulfur applications reduce disease severity, although no research to date has focused on sulfate applied with nitrogen. A field experiment was initiated on an annual bluegrass putting green in western Oregon, a region without prolonged snow cover, to evaluate the effects of autumn and winter nitrogen rates and sources with and without s …