Predicting bentgrass dead spot

Bentgrass dead spot, caused by the fungus Ophiosphaerella agrostis, is a relatively new disease that was first described in 1998. It has been documented as causing problems on bentgrass greens in 11 states (IL, MA, MD, MI, MO, NC, NJ, NY, OH, PA, VA) and on bermudagrass greens in 2 states (FL and TX). While it has been known for some time that preventive fungicide applications are optimal for control of this disease, information on the timing of preventive sprays…