This research was designed to determine the efficacy of formulations of Trichoderma harzianum as a biocontrol for dollar spot disease on creeping bentgrass turf. Prepared inoculum was applied to the turfgrass at various times throughout the season when dollarspot disease is prevalent. Canopy reflectance data illustrated significant differences among treatments for both Rounds 1 and 2. Differences among canopy reflectance were attributed to dollarspot pressure. NDVI was show to be a useful estimator of the effect of dollar spot on turf quality. While infection of Round 1 was successful, and showed expected disease symptoms, Round 2 was infected much later in the season and only developed mild symptoms of the disease. From the data collected from Round 1, there was significant evidence of some treatment differences by the end of the season.